Back End Developer Mock Interview

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

Question 1 of 30

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

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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.

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.

William Swansen

"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."

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Anonymous Answer

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.

Marcie's Feedback

Nice job! This is a strong answer because it is thorough, clear, and direct. You do a great job of explaining which programming languages you like best and why. Great answer!

Anonymous Answer

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.

Marcie's Feedback

Excellent! Your answer is very direct and clear. You do a great job of explaining why Python is your favorite programming language. Nice job!

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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 programming languages do you prefer to work with and why?

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?