Back End Developer Mock Interview

Master 30 Back End Developer interview questions covering APIs, databases, system design, and server architecture.

Question 11 of 30

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

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William Swansen has worked in the employment assistance realm since 2007. He is an author, job search strategist, and career advisor who helps individuals worldwide and in various professions to find their ideal careers.

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.

William Swansen

"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."

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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).

Marcie's Feedback

Great. You clearly list multiple advantages that MongoDB has over common SQL databases. Can you think of a real-life situation when you've used MongoDB instead of a SQL database and explain why you made this choice? Although these questions are testing your technical knowledge, you always want to personalize them as much as possible.

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30Back End Developer Interview Questions & Answers

Experience

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

Operational

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

Experience

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

Operational

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

Operational

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

Technical

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

Technical

7.What does the acronym REST stand for?

Technical

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

Hybrid

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

Operational

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

Technical

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

Operational

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

Technical

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

Operational

14.How can you prevent SQL Injection attacks?

Operational

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

Technical

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

Operational

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

Technical

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

Technical

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

Operational

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

Operational

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

Technical

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

Technical

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

Technical

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

Operational

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

Operational

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

Technical

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

Technical

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

Technical

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

Technical

Back End Developer Mock Interview

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

30Back End Developer Interview Questions & Answers

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

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

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

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

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

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

7.What does the acronym REST stand for?

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

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

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

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

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

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

14.How can you prevent SQL Injection attacks?

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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