What is the largest software project you have ever worked on? What was your role in the project?

"The largest software development project I have worked on was creating a database of automotive parts for a car manufacturing company. The challenge was to inventory each part used by the manufacturer and cross-reference them with the vehicles they could be used on since many parts could be applied to multiple vehicles. My role was to create the SQL queries so the workers could find the correct part by using common terminology they were familiar with."

The purpose of this question is to determine the scope of responsibility you had on previous projects and the capabilities you will bring to this position. The interviewer assumes that larger projects are more complex and require greater skills, including organization, collaboration, and attention to detail. By understanding this, you can answer that question to address these concerns. Again, try to provide an answer the aligns with the type of software development work the organization currently does.

"A full-stack Django application incorporating Stripe payments and AWS hosting for an author. I worked on this individually whilst learning Django. I had to think deeply about how to make checkout flow secure and efficient for users and I also was learning how to use AWS and manage IAM roles and s3 bucket permissions. I was very proud of the finished result and how much I learned from this project - during which I developed a great enjoyment of using Django with its extensible functionality."

What programming languages do you prefer to work with and why?

"The programming languages I prefer to work with include Python, PHP, and HTML5. I prefer these because they are object-oriented, use plain language, and have robust code libraries that I can reuse. Since these are common languages currently used in the industry, it makes it easier to collaborate with other programmers."

This is an opening question which the interviewer will ask to begin the conversation, learn more about your background, and collect information they can use throughout the interview. This provides you the opportunity to direct the interview to the subject area that you're most familiar with. Your answer should address the programming languages that the organization currently uses.

"The programming languages that I prefer to work with are Python, HTML, CSS, Java, and JavaScript. I prefer these languages because they are object-oriented and have a large library that can be reused. Since these are common languages currently being used in the industry, it makes it easier to collaborate with other programmers."

"Python. I like the high level, readable syntax and the use of indentation for scoping blocks of code - this makes the code more readable and maintainable. Python supports OOP so it is easy to encapsulate functionality and state to produce a modularized, extensible codebase. There are a huge number of libraries available for diverse use cases, great documentation, and a large support community which allows easier collaboration. Python's portability across environments also counts to its ease of use."

Can you describe an SQL injection attack? What measures can be taken to prevent it?

"A SQL injection attack is a common form of an attack in which a hacker takes advantage of a lack of separation between a program code and information input by the user. This allows the hacker to inject malicious code into the program. With this specific type of attack, the code is provided via SQL queries. There are several ways you can prevent this type of attack. These include careful definitions of the type of queries that can be made, storing procedures, and validating the users' input."

This is a hybrid of a technical and operational question. You first have to define a specific term and then describe how you would address it. During the interview process, hybrid questions are typical for a back end developer's position. Like their individual components, a hybrid operational and technical question should be answered briefly and to the point. You should also anticipate follow-up questions indicating that the topic is important to the interviewer and they want to explore it in more depth.

"Malicious SQL statements sent to servers are intended to corrupt the database or expose sensitive data. This is sometimes done by entering the SQL code as input on a webpage form so that the inputted SQL is run as part of an existing SQL query on the application's database. A lack of separation between server code and user input exposes this vulnerability which can be mitigated by validating user input and defining the types of queries that can be made at the database level."

Can you describe the software lifecycle methodology used in your current position?

"Currently, my organization uses the Agile methodology for software development. The benefit of this is that issues are identified and addressed in real time before impacting our team's work later in the software development lifecycle. It also allows for iterative improvements in the processes, which results in more efficient practices later in the project."

An interviewer will ask this question to determine if your current practices align with those used by their organization. When preparing for an interview, you should research the company to determine the programming languages and development practices they use. This will help you prepare to answer these questions. You could either confirm that you're using similar languages and methodologies or state that you use different ones. If you choose the latter option, make sure you can justify your answer and provide evidence as to why your methodologies may benefit the organization.

"I do not yet have industry experience but I have worked on a number of individual and collaborative projects following the agile development methodology. Work is divided into small tasks and assigned to members of the team to work on in sprints. Regular update meetings are convened to check progress and replan as necessary. Development progresses in high frequency, short iterations and is deployed quickly with multiple releases."

What are some of the performance testing best practices you use when creating website back ends?

"When I've completed developing the back end for a website, I test its performance to ensure it will function as it was designed and provide an exceptional user experience. Some of the best practices I employ during this testing phase include: -Testing each of the software units independently and as a unit -Establishing baseline measurements to track changes after addressing issues -Testing early and in each phase of development to identify potential issues -Conducting multiple tests to ensure the results are consistent -Performing tests in environments as close to the production systems as possible -Calculating averages and eliminating outliers to identify actionable items"

Throughout the interview, the interviewer is trying to learn about your skill sets, experience, and ability to do the job for which you are interviewing. They will ask many questions about the processes you use and the steps you take to create high-quality websites. You should be able to answer these easily because they address what you do every day. However, practicing questions like this will train you to structure your answers with familiar language and deliver them effortlessly.

Can you provide some reasons why you would utilize a microservices architecture?

"There are several reasons you would employ a microservices architecture when developing software. The first is that microservices are flexible and easily adapt to multiple frameworks and technologies. Another reason is that when one process fails within a microservices environment, the others are not affected. Microservices are also applicable across all sizes of organizations, and they can be deployed quickly when needed."

This technical question assumes that you are familiar with Microservices Architecture. When preparing for an interview, you should research the organization to determine its technologies and programming methodologies. Knowing this will help you prepare for questions like these. If you're not familiar with the topic the interviewer is asking you about, it is okay to admit this, as long as you state how you would go about acquiring the knowledge or the skills needed.

"A microservices architecture involves a suite of small separate services (each running its own process) communicating and working together to provide overall application functionality. Individual services are lightweight and can have independent implementations, and communicate via HTTP protocol. This architecture requires minimum central administration since the services can be designed and implemented independently, and all that matters is the API they expose. A microservices architecture provides modularity; each service is independently and automatically deployable and is more likely to fail independently. Amazon famously adopted this approach early on to great success and has been able to externalize these individual services via AWS."

What advantages do web services provide over hosted applications?

"There are several advantages that web servers offer over hosted applications. These include their interoperability, which refers to their ability to be accessed across a wide range of devices and from remote locations. This also refers to web services being developed on interoperable platforms. Another advantage is that a single service can host multiple applications. From a developer's perspective, the code is independent of the server's system software, which provides more flexibility when writing applications. Taken together, these advantages provide efficiencies to organizations using web services."

An interviewer will ask this type of question for several reasons. First, they are interested in learning about your expertise around this topic. Next, they want your opinion on which of these two methodologies for accessing applications is more effective. Finally, they want to see if your position on this subject aligns with their organization. The best way to respond to these types of questions is honestly, with a clear justification of your opinion and position on the topic.

"Web services can be accessed by a range of devices in different locations. The implementation of the service can be independent of the server system software, allowing a range of languages and frameworks to be used when writing applications. I have used Heroku and AWS to deploy multiple applications without needing any knowledge of their underlying implementations."

What are some of the techniques you use to manage user sessions on your websites?

"There are several different ways I can manage the user sessions on my websites. These involve creating sticky sessions, which are a form of load balancing. Load balancing ensures a specific machine always serves the user sessions. This avoids the need to store the user session information and making it available to all the machines which can serve it. All the requests for a particular session are always redirected to the machine associated with it using SessionId cookies. An issue with using this approach is that the client browser may not support cookies, and a load balancer will not identify it. Also, if one of the machines fails or goes down, the user information served by that machine will be lost along with the user session."

As the interview progresses, the interviewer is likely to ask you more in-depth technical questions. This helps them differentiate candidates and focus on those with greater skills applicable to the organization's type of websites. When responding to the more difficult questions, continue to keep your answers brief and to the point. Make sure you use plain language, avoiding acronyms and industry jargon. Never assume the interviewer understands as much about websites as you do.

Can you describe some steps used in performance testing?

"Some of the steps used when conducting performance testing include:- Creating a testing environment - Determining the test metrics - Designing the tests which will provide the metrics - Configuring the environment - Executing the tests - Analyzing the results, documenting them, and repeating the tests if necessary"

You can easily identify an operational question when the interviewer asks you to describe the steps used to accomplish a task or completed a process. When answering an operational question, you should keep your response brief and to the point and anticipate a follow-up question. If the interviewer does ask a follow-up question, it indicates that the topic is important to their operations. This signals you to provide more in-depth information when you answer the follow-up.

How can you prevent SQL Injection attacks?

"There are several ways you can prevent an SQL injection attack. One way is closely defining the parameters for queries. This identifies nonstandard queries, allowing systems administrators to block them. A similar one uses prepared statements for queries and defines the SQL code they use. Another way to prevent SQL injection attacks is using stored procedures, in which a database administrator calls a procedure when they need it. The final methodology I prefer is known as lists input validation. This blocks any input which has not been stored on what is known as a white input list."

If this question looks familiar, it is. Interviewers will often ask different versions of the same question throughout an interview. The reason for this is to calibrate your answers to questions and make sure you are consistent. The best way to ensure that your answers to questions are the same is to answer them honestly and accurately. That way, you do not need to recall your previous answer to a similar question.

I've heard about the DRY and DIE principles related to website backend development. Can you explain these principles?

"When developing back ends for websites, there are some informal guidelines most developers follow. DRY and DIE are two of these. DRY stands for Don't Repeat Yourself, and DIE means Duplication is Evil. While repeating or duplicating information on a website will not affect the website's functionality, doing this will impact the user experience. This may be fatal to the website's effectiveness if users decide not to visit it due to redundancy on the site. I try to follow these guidelines whenever I'm developing a back end for a website."

While this appears to be a technical question on the surface, it is actually more of a cultural question. The difference is that technical questions address specific technologies used in website development, while cultural questions address general behaviors, beliefs, or methodologies developers use when creating their websites. You can expect both types of questions during the interview for this job.

Which do you prefer, acceptance testing or functional testing?

"When given the option, I prefer functional testing to verify my code. This is because a functional test confirms that the product we developed works and performs the tasks we redesigned it for. The alternative is acceptance testing. This validates that we developed the product that the end-user requested and needs. It typically addresses whether the software solves the problem for the end-user. When using functional testing, it is important to clearly understand the end-users issue and the type of software they need to address it. Doing this enables the functional test to simultaneously perform the acceptance test."

When asked a question about which process you prefer, it is best to answer by picking the one you use and then describing why you prefer it. Your rationale should discuss the benefits of the process, the technology it employs, and the operational advantages realized from using it. If you have done your research, you also can choose the process currently used by the employer to confirm that you will fit into their operations seamlessly.

"I prefer functional testing. The purpose of functional testing is to verify that the application performs as intended by checking its behavior and output for various inputs and user interactions. It confirms that the product works and performs the tasks it was designed for. If the needs of the end-user are understood, then functional testing can also perform as acceptance testing to validate that the end user's goals and needs are met."

Can you describe the programming methodology known as Continuous Integration?

"Continuous Integration, or CI, is a development methodology in which developers collaborate by adding their code to a central repository. Every time a developer does this, the entire code goes through an automated build, and the tools identify any errors or bugs which need to be addressed. This methodology is very similar to Agile programming."

This technical question asks you to define a process used in your profession. As a back end developer, you can anticipate that most of the questions you will be asked will be technical or operational. The best way to prepare for these is to review the terminology, processes, and other aspects of your job before the interview. Also, research the company you are interviewing with to determine the practices they use to create the products they develop. This will help you align your answer to their current processes.

"Continuous integration (CI) is the practice of merging sub-branches being worked on by individual developers into the main branch of a remote repository whenever a commit is pushed to the sub-branch and also regularly pulling the latest version of the main branch into individual developer environment. When a new commit is pushed automated tools are used to run tests and check the build passes. This practice ensures that local and remote codebases are synchronized and minimizes potential merge conflicts."

Have you ever experienced a problem or encountered issues when using Object-Oriented Programming (OOP?)

"While it is rare, I do occasionally encounter issues when using one of the object-oriented programming languages. These typically are due to an unavailable library or set of code that I need, or having to rewrite the code for the object I need for my program. These issues are easily overcome. By adding my new code for the library, the issue is not likely to be encountered twice."

Questions like this can either stand on their own or be a follow-up to a previous question. During an interview, the interviewer will ask follow-up questions once you provide an answer. The reason for this is to explore a topic in more detail or confirm your knowledge of the topic. You should always be prepared for follow-up questions. Keeping your answers brief and to the point will encourage interviewers to ask follow-up questions and allow you to demonstrate your knowledge of the topic in more detail.

"When trying to reuse a class or import a class from a library, which is a subclass dependant on parent classes, it is necessary to run lots of extra code. The class you are trying to use comes with a whole unwanted 'environment.' Using inheritance can also be a problem if a parent or base class of a class you are using from a library is changed. This can break your code. The solution requires rewriting the code so that it works with the updated base class."

What experience do you have working with object-oriented programming (OOP) languages?

"I have a great deal of experience with object-oriented programming, as noted in my resume. I prefer working with programming languages that use OOP since they make it easier to organize the code and objectify code groups. I can also repurpose my code for various tasks, and I can use procedural programming which addresses rather than objectifies."

This may seem like an odd question since you probably provided this information on your resume or may have addressed it in a previous answer to one of the interviewer's questions. However, it is common for interviewers to ask questions like this to confirm your resume's content or calibrate the answers you provide to similar questions throughout the interview. As long as your answers are consistent and address your actual experience and knowledge, you should have no problem with this.

"I have worked mostly in Python, which fully supports an OOP approach with class encapsulation, inheritance, and composition. I have used the Django framework, which provides custom functionality by subclassing built-in classes. I have also written a program with an object-oriented structure in Javascript - a game where each class represented a component of the game and held its own state and functionality."

Can you discuss the differences between a clustered and a non-clustered index?

"While both of these are types of indexes that access stored data, the difference between them involves how the data is indexed. In a clustered index, the records in the tables are reordered. The leaf nodes of a clustered index contain the data pages. A table can only have one clustered index. The data in a non-clustered index does not match the physical stored order of the rows on the disk. The leaf nodes of a non-clustered index contain index rows. The purpose of each of these indexes is to make specific types of data easier and faster to retrieve."

Technical questions are often asked in the form of comparing two terms or topics. When responding to these types of technical questions, you should define each term and then compare and contrast them. You may want a finish your answer with an example that illustrates your response. This will confirm to the interviewer that you have a clear understanding of the topic they are asking about. If

Continuous integration, continuous delivery, and continuous deployment seem to be similar to each other. Can you explain the differences between them?

"While these three terms may sound similar, there are distinct differences between them. The practice of continuous integration involves merging changes to websites back to the main branch as often as possible. This avoids having to merge their changes into the release branch just before it is released. Continuous delivery is an extension of continuous integration that releases changes quickly in a sustainable way. This involves automating the testing and release processes so the application can be deployed at any time. Continuous deployment is the next step. This practice passes changes during all stages of production directly to the websites, with no intervention. Only failure of an automated test will prevent a change from being deployed."

The types of questions you will be asked during an interview for a back end developer role will differ depending on who is interviewing you. Some of the interviewers will be directly involved in website development and will have a deep technical background. Others may be from different departments or HR and may either be reading scripted questions or only peripherally aware of the topics they are asking about. In any case, you should keep your answers direct and to the point, using common, everyday language.

Please walk me through the differences between JOIN and UNION?

"Both JOIN and UNION are technologies associated with SQL operations and multiple data sets. JOIN allows users to lookup or query records on two tables based on the specified conditions between the tables. UNION is an operation that combines two similar data sets to generate a resulting data set that contains all the data from the original data sets. Union does not require any specified conditions for joining the data sets."

This is yet another question asking you to compare and contrast two technical terms. During a back end developer job interview, interviewers will ask you technical, operational, behavioral, and general questions. While they often start with general questions and sometimes end with behavioral questions, they can use all these types of questions throughout the interview. No two interviewers are alike, so you cannot anticipate the types of questions you will be asked and when they will be asked. The best way to perform well during an interview is to carefully listen to the question, provide the interviewer with an answer in clear and easy-to-understand language, and be prepared for follow-up questions used to explore the topic in more detail.

What are RESTful web services, and are there any disadvantages to using them when developing a website back end?

"RESTful web services use the Representational State Transfer (REST) architectural style to specify website properties such as the uniform interface. This helps the back end developer specify the website's properties, including its performance, scalability, and modifiability. In the REST architectural style, data and functionality are resources accessed using Uniform Resource Identifiers (URIs), which are web links. Some of the disadvantages of REST are that it has to be communicated through means such as documentation or emails, there can't be asynchronous calls, and sessions can't be maintained."

During a back end developer interview, most of the questions you will be asked will be technical or operational. These questions help the interviewer determine your ability to do this job and provide them information about the processes and technologies you use to create website back ends. You can prepare for these types of questions by researching the company and its websites and determining the technologies they currently use. It is also a good idea to contact both current and former website developers from the organization to learn about the technologies they use.

Can you discuss the ACID property of a relational database system?

"The properties of a relational database are often described using the acronym ACID. This stands for: Atomicity - A property that guarantees that if any part of a transaction fails, the entire transaction will fail. This prevents database errors. Consistency - This ensures that every transaction moves the database from one state to another valid one. Isolation - This addresses the concurrent execution of transactions resulting in the system state that serial transactions create. Durable - This ensures that executed transactions are maintained, even if the power is lost."

As a back end developer, the websites you create will interact with other hardware and software systems. One of the systems many websites exchange data with is a relational database. Even though it is not your responsibility to manage the databases, you should have a good working knowledge of them so your code can exchange data between your website and the database. The interviewer will expect you to at least be familiar with this and be able to discuss it.

Our organization uses Monolithic, SOA and Microservices Architectures. Are you familiar with these and how they differ?

"I am very familiar with each of these architectures and have used them in my web development practices. A Monolithic Architecture is like a big container in which all the software components of a web application are assembled together. An SOA or Service-Oriented Architecture is a compilation of services that communicate and work with each other. The communication can involve either sharing data or services coordinating activities. Finally, Microservice Architecture is a style that constructs a web application as a collection of small autonomous services. These are often focused on a single function or domain."

An interviewer will ask this type of question to confirm that you are familiar with the type of technologies they currently use in their website development operations. As a back end developer, you may not actively use each of these architectures, but you should at least be familiar with them. If you don't use them, you could admit this and then describe what resources you would use to educate yourself about them and incorporate them into your development practices. Another approach is to suggest alternative architectures. You should only do this if you believe this would help the organization improve its operations and can justify and defend your recommendations.

In your opinion, what is meant by high availability (HA)?

"In my opinion, high availability means being able to access the web site at any time from any location using any type of device. I always strive to attain five-nines availability for the websites I develop. This requires me to work with the systems and network engineering teams to ensure that the hardware is functioning properly, network communications allow access to the website, and that the software is backed up or has redundant functionality."

The back end developer position involves many technical terms and acronyms specific to the job. The interviewer is likely to ask you about these and define them or provide your perspective on what they mean. This is especially important for a role that involves developing high-availability websites. The purpose behind this question is to confirm that your definition of high availability is the same as the one their organization uses.

Can you discuss the difference between a WHERE clause and a HAVING clause?

"The difference between a WHERE clause and a HAVING clause is based on whether the program uses aggregated columns. A WHERE clause can only be used when there are no aggregated columns, and the program uses static non-aggregated columns. By default, the HAVING clause is used on aggregated columns."

This technical question asks you to compare two techniques utilized when developing a new software application. This is a typical example of a technical question. When responding to this type of question, first define each term and then compare them. In some cases, you may want to state the advantages one offers over the other, or provide an example of how they are used to strengthen your answer.

"Both clauses are part of an SQL SELECT command and act as filters. The WHERE clause applies filtering at the individual record level for a given condition, whereas the HAVING clause is used to filter aggregates of records by a given condition (after data has been aggregated via an aggregate clause, the set of groups is filtered by the HAVING condition). I have used the built-in ORM in Django for abstract writing SQL queries to RDBMS."

What is Containerization? What advantages does it offer over virtualization?

"Containerisation is a virtualization strategy that developers use to replace hypervisor-based virtualization. When using containerization, the OS is shared by each container. This is more efficient than cloning the OS for each virtual machine. It also makes them easier to manage by the systems administrators."

This is an example of a technical question. Technical questions ask you to define the topic, concept, process, or work term used in your profession. They may also ask you to define the advantages of the concept or compare one concept to another. When answering technical questions, you should keep your response brief and to the point. The interviewer will ask you a follow-up question if they need additional information or want to explore the topic in more detail.

"Virtualization is the simulation of the hardware of a machine including a kernel, VMware, for example. Containerization is a simulation of only the operating system; Docker and Kubernetes are examples of containerization services. Containerization is much more lightweight than virtualization, and multiple applications can run on the same hardware/VM since isolation occurs at the process level. Containerization allows portability; the application can be built and run in any environment (cloud or onsite) without extensive system configuration. I have used Docker images to deploy applications I have built to Heroku and AWS cloud hosting services where the build and process were defined by a config file in my directory and run in isolation in the cloud."

Are you familiar with Go? What advantages does it offer a programmer?

"Go is a relatively new language being introduced to the programming profession. The developers of GO claim the benefits lay in its unstructured nature, fast compilation, and low overhead. The main use of Go is to collect garbage within the code. It was specifically developed to create system software on multicore computing devices."

When asking this question, the interviewer is testing your knowledge of a specific technology that is likely in use within their operation. If the technology is a common one for your profession, you should know about it and be able to describe its function and advantages. If it is obscure or rarely used, it is OK to acknowledge that you don't know about it, and then describe how you would go about learning it.

Can you discuss the main elements of a web API?

"There are several critical elements when defining a web API. These include statements communication, XML and JSON formatting languages, HPPT for communication between the client and the server, and simple URI for services."

You know the technical question. When interviewing for a back end developer's role, most of the questions you will be asked will be technical. These questions allow the interviewer to confirm your skills and experience while determining if these match the requirements of the role they are interviewing for. The best way to prepare for an interview is to study the processes you use daily and the technical terminology associated with them. This will keep the information fresh in your mind. You should also practice answering questions like these.

"A web API handles requests and sends responses using HTTP protocol across the internet. A web API has a load balancer to allocate requests to servers running the application to prevent server overload. It has a router to direct each request to the appropriate resource on the server to handle it. It has views that handle requests, make queries to a database, and return responses typically formatted as JSON or XML."

What advantages does MongoDB have over common SQL databases, such as Oracle?

"Most SQL databases use very formal structures including tables, rows, columns and records to store and retrieve data. While this is easy to organize and manage, it is not very flexible. On the other hand, MongoDB uses a flexible structure that allows it to be modified and extended, based on the requirements of the data and the queries used by the program."

Many questions you will be asked during an interview will ask you to compare two or more items. Interviewers will use these types of questions for several reasons. First, they help to confirm your knowledge of the topics. Second, it enables them to understand your preferences. And finally, they can determine whether you are familiar with the processes or technology used by their organization. Reviewing the terms, concepts, and processes used in your job and researching the company to understand what technologies the employer utilizes will help you be prepared to respond to these types of questions.

"In a MongoDB collection, data is stored as documents that have a JSON-like structure and can be queried in the same way. This allows for a flexible data and query structure and nested data with no need for a rigid tabular schema like SQL relational database. The data can be structured specifically to meet the needs of the application and less data transformation is needed before adding to the database. MongoDB databases can be distributed across multiple nodes - this increases availability and enables horizontal scaling (e.g in a cloud computing environment) to handle a large volume of data - SQL databases only allow vertical scaling (increasing resources on one machine on which database runs)."

Can you describe a NoSQL database and how it differs from a relational database?

"A NoSQL database is a mechanism that allows for the storage and retrieval of data and information. It is similar to a relational database, except a NoSQL database does not depend on tabular relations. A NoSQL database's common elements include key values, graphs, and both column and document orientation."

Technical questions are defined as questions that ask you to discuss a term, process, or other aspects used in the work you perform. Technical questions will often ask you to compare one concept to another one. When answering this type of question, first define the term or concept, and then make the comparison. Keep your answer direct and to the point, and anticipate a follow-up question which the interviewer will ask to explore the topic in more detail.

"A NoSQL database (such as MongoDB) does not organize data into tables with a predefined schema like a relational database (such as Postgres) does. The structure of each record in a NoSQL database can be different and can contain nested data. NoSQL databases cannot be queried using SQL but require a different query structure. NoSQL databases typically do not provide an ACID guarantee, unlike relational databases."

What does the acronym REST stand for?

"The acronym REST stands for REpresentational State Transfer. It is a web architecture that uses HTTP Protocol for data communication. The main principle behind REST is that every component is a resource which is accessed by the user interface using HTTP standards."

This technical question simply asks you to define a concept used in this profession. It is important to carefully listen to the questions you are being asked during an interview. This will ensure that you understand the question and provide the answer the interviewer is looking for. You should also wait until the interviewer finishes asking the question before thinking about your answer. This will ensure that your answer is the right one for the question. This was one of the most common mistakes candidates make during an interview.

"Representational state transfer. It is an architectural style designed to standardize web communications using the HTTP protocol. REST-ful systems are stateless and separate the concerns of client and server so implementations can be independent."

What Is CAP Theorem? How do you use it in your work?

"The CAP Theorem was developed by Eric Brewer. It states that a distributed computer system cannot provide Consistency, Availability, and Partition tolerances at the same time. The programmer's role is to determine which of these three qualities are the most important for the program they are creating. Then, they optimize one or two of the three to match the program's requirements. The CAP Theorem is used by major computer service providers to optimize the services they provide to users."

This is an example of a technical question. Technical questions will ask you about concepts, processes, or elements used in your work as a back end developer. The appropriate way to respond to a technical question is first defining the term and then describing how it is used. When answering technical questions, keep your answer brief and to the point, and anticipate a follow-up question.

"A distributed database can only achieve a maximum of two out of three of the following guarantees: consistency, availability, and partition tolerance. This implies that in the presence of partitions, a system architect must choose between availability and consistency. I use the CAP theorem to inform trade-offs for system design decisions and optimize performance measured against requirements, specifically whether to prioritize up-to-date or accessible data, depending on the project specifications."

Back End Developer Interview Questions

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1. What is the largest software project you have ever worked on? What was your role in the project?
2. What programming languages do you prefer to work with and why?
3. Can you describe an SQL injection attack? What measures can be taken to prevent it?
4. Can you describe the software lifecycle methodology used in your current position?
5. What are some of the performance testing best practices you use when creating website back ends?
6. Can you provide some reasons why you would utilize a microservices architecture?
7. What advantages do web services provide over hosted applications?
8. What are some of the techniques you use to manage user sessions on your websites?
9. Can you describe some steps used in performance testing?
10. How can you prevent SQL Injection attacks?
11. I've heard about the DRY and DIE principles related to website backend development. Can you explain these principles?
12. Which do you prefer, acceptance testing or functional testing?
13. Can you describe the programming methodology known as Continuous Integration?
14. Have you ever experienced a problem or encountered issues when using Object-Oriented Programming (OOP?)
15. What experience do you have working with object-oriented programming (OOP) languages?
16. Can you discuss the differences between a clustered and a non-clustered index?
17. Continuous integration, continuous delivery, and continuous deployment seem to be similar to each other. Can you explain the differences between them?
18. Please walk me through the differences between JOIN and UNION?
19. What are RESTful web services, and are there any disadvantages to using them when developing a website back end?
20. Can you discuss the ACID property of a relational database system?
21. Our organization uses Monolithic, SOA and Microservices Architectures. Are you familiar with these and how they differ?
22. In your opinion, what is meant by high availability (HA)?
23. Can you discuss the difference between a WHERE clause and a HAVING clause?
24. What is Containerization? What advantages does it offer over virtualization?
25. Are you familiar with Go? What advantages does it offer a programmer?
26. Can you discuss the main elements of a web API?
27. What advantages does MongoDB have over common SQL databases, such as Oracle?
28. Can you describe a NoSQL database and how it differs from a relational database?
29. What does the acronym REST stand for?
30. What Is CAP Theorem? How do you use it in your work?

Back End Developer Interview Questions

1. What is the largest software project you have ever worked on? What was your role in the project?

2. What programming languages do you prefer to work with and why?

3. Can you describe an SQL injection attack? What measures can be taken to prevent it?

4. Can you describe the software lifecycle methodology used in your current position?

5. What are some of the performance testing best practices you use when creating website back ends?

6. Can you provide some reasons why you would utilize a microservices architecture?

7. What advantages do web services provide over hosted applications?

8. What are some of the techniques you use to manage user sessions on your websites?

9. Can you describe some steps used in performance testing?

10. How can you prevent SQL Injection attacks?

11. I've heard about the DRY and DIE principles related to website backend development. Can you explain these principles?

12. Which do you prefer, acceptance testing or functional testing?

13. Can you describe the programming methodology known as Continuous Integration?

14. Have you ever experienced a problem or encountered issues when using Object-Oriented Programming (OOP?)

15. What experience do you have working with object-oriented programming (OOP) languages?

16. Can you discuss the differences between a clustered and a non-clustered index?

17. Continuous integration, continuous delivery, and continuous deployment seem to be similar to each other. Can you explain the differences between them?

18. Please walk me through the differences between JOIN and UNION?

19. What are RESTful web services, and are there any disadvantages to using them when developing a website back end?

20. Can you discuss the ACID property of a relational database system?

21. Our organization uses Monolithic, SOA and Microservices Architectures. Are you familiar with these and how they differ?

22. In your opinion, what is meant by high availability (HA)?

23. Can you discuss the difference between a WHERE clause and a HAVING clause?

24. What is Containerization? What advantages does it offer over virtualization?

25. Are you familiar with Go? What advantages does it offer a programmer?

26. Can you discuss the main elements of a web API?

27. What advantages does MongoDB have over common SQL databases, such as Oracle?

28. Can you describe a NoSQL database and how it differs from a relational database?

29. What does the acronym REST stand for?

30. What Is CAP Theorem? How do you use it in your work?