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Google Software Developer Mock Interview

To help you prepare for a Software Developer interview at Google, here are 30 interview questions and answer examples.

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Question 1 of 30

What are some of the testing and debugging processes you use in your software development?

"I typically use unit testing tools to identify errors in my code when I develop software. I follow this with a debugging process and additional testing of the bug fixes. This is known as White Box Testing. The debugging tools I use most often are GDB and DBX, which are both public domain products. I prefer these because they provide command-line interfaces. I used command-line when in school, and it has always been easier for me to work with than a GUI. Some other tools I use are code-based tracers, profilers, and interpreters."

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Google Software Developer Interview Questions & Answers

Below is a list of our Google interview questions. Click on any interview question to view our answer advice and answer examples. You may view 5 answer examples before our paywall loads. Afterwards, you'll be asked to upgrade to view the rest of our answers.

  • Behavioral

    1. What are some of the testing and debugging processes you use in your software development?

  • Behavioral

    2. What are some of the software design patterns that you use, and in what situations do you use them?

  • Behavioral

    3. How do you approach implementing an LRU Cache in your favorite programming language?

  • Behavioral

    4. What software development process do you prefer to use?

  • Behavioral

    5. Describe how do you implement an insertion sort algorithm, and what's the easiest way to do it?

  • Behavioral

    6. How would you define software configuration management?

  • Competency

    7. How much do you know about object-oriented programming?

  • Competency

    8. What method do you use to find the missing number in an integer array of 1 to 100?

  • Competency

    9. I've heard applications referred to as both software and programs. Which terminology do you use, and how do these differ?

  • Competency

    10. Making a comparison, how would you differentiate between Quality Assurance and Quality Control, as you believe it is implemented here at Google?

  • Competency

    11. Talk about the differences between structured English and Pseudo Code.

  • Competency

    12. Explain how duplicates are removed from an array without using a library.

  • Competency

    13. Prior to starting any software development project here at Google, we perform a feasibility study. What is your opinion on a feasibility study, and when should it be done?

  • Competency

    14. What is software scope, and what does the process involve?

  • Competency

    15. If hired by Google, one of your tasks will be to debug your and other developer's code. As a software developer, explain the meaning of debugging and why it's used?

  • Competency

    16. What are verification and validation, and why are they important?

  • Competency

    17. Describe at a high level what the software development life cycle process is.

  • Competency

    18. Can you list for me the important categories of software development?

  • Competency

    19. Google software developers use a variety of different sorting algorithms. Tell me the difference between a Comparison and Non-Comparison Sorting Algorithm?

  • Competency

    20. Can you walk me through the meaning behind a Depth First Search Algorithm for a binary tree?

  • Competency

    21. How do you find the starting node of a cycle if a link contains a cycle?

  • Competency

    22. Here at Google, our developers work with Java quite a bit. Tell me how you find duplicate numbers in an array in Java containing multiple duplicates?

  • Experience

    23. As part of software development, were you involved with working on functional and non-functional requirements?

  • Experience

    24. What is your experience with implementing a Binary Search Algorithm without recursion?

  • Experience

    25. What are some of the types of development projects you have worked on in your past positions?

  • Experience

    26. Based on your experience, what's the best way to find a node that begins with two single link lists?

  • Experience

    27. Can you describe a challenging software development project you recently completed and the results?

  • Experience

    28. What are some of the QA processes you are familiar with and have worked with in the past?

  • Personal

    29. Do you have a preferred language that you like to write programming algorithms?

  • Personal

    30. Are you familiar with Agile and Waterfall? Which of these software development methodologies do you prefer?