MockQuestions

Facebook Software Engineer Interview Questions

To help you prepare for a Software Engineer interview at Facebook, here are 26 interview questions and answer examples.

Facebook was written by and updated on March 24th, 2021. Learn more here.

Question 1 of 26

Facebook is very proud of our products and the people who develop them. In your opinion, what distinguishes a great software engineer from an average one?

How to Answer

When an interviewer asks this type of question, they seek to understand what your perception of excellence in this role is. When answering the question, you should align your response with the job requirements, as defined in the job posting. You can also incorporate your past performance to demonstrate that you are aware of what excellence is and strive to achieve it.

Written by Audra Kresinske on March 25th, 2021

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Facebook Software Engineer Interview Questions & Answers

  • Behavioral

    1. Facebook is very proud of our products and the people who develop them. In your opinion, what distinguishes a great software engineer from an average one?

      How to Answer

      When an interviewer asks this type of question, they seek to understand what your perception of excellence in this role is. When answering the question, you should align your response with the job requirements, as defined in the job posting. You can also incorporate your past performance to demonstrate that you are aware of what excellence is and strive to achieve it.

      Written by Audra Kresinske on March 25th, 2021

      1st Answer Example

      "I believe the trait which distinguishes a great software engineer from an average one is being able to balance excellence and performance. While I strive to write perfect code, I recognize that the project has a deadline and needs to be accomplished on time and under budget. If I have to compromise the quality of my code, it is done in such a way that it will not impact the final performance of the product."

      Written by Audra Kresinske on March 25th, 2021

  • Behavioral

    2. Here at Facebook, we value work life balance and initiative. What personal software development projects have you worked on outside of work?

      How to Answer

      In addition to seeking candidates who have the skills and experience necessary to perform the job, hiring managers at Facebook want to make sure the individual will fit into their organization. This is why they are likely to ask you about activities outside of the workspace and personal interests you may have. Your ability to contribute to the corporate culture is equally as important as your ability to do the job. You should have some stories about your personal life prepared, just in case the interviewer asks about this.

      Written by William Swansen on March 25th, 2021

      1st Answer Example

      "As odd as it sounds, I do enjoy programming and creating applications outside of work. I enjoy this because it allows me to test my skills and utilize new methods on applications I find interesting without the pressure of meeting a deadline or end-user requirements. I recently created a program that allows me to control several different Wi-Fi LTE devices in my home from my phone. The app has features similar to Amazon Alexa or Facebook, but with a customized interface and more efficient code."

      Written by William Swansen on March 25th, 2021

  • Operational

    3. If hired by Facebook, can you estimate what portion of your day will involve coding and other activities you will perform when not coding?

      How to Answer

      This operational question is seeking to understand how you go about doing your job on a day-to-day basis. Operational questions will ask you about the processes you use to accomplish the tasks required by this position. The best way to answer operational questions is directly and briefly. The Facebook interviewer will ask you a follow-up question if they need more information or want to explore the topic in more detail.

      Written by William Swansen on March 25th, 2021

      1st Answer Example

      "During a normal day, I spend about 60% of my time writing code. The remainder of the day is spent reviewing my work, meeting with my manager, collaborating with other coders on my team, and learning new coding technologies and methodologies."

      Written by William Swansen on March 25th, 2021

  • Operational

    4. Many Facebook Software Engineers prefer to program in Java. Can you describe how you would implement linear search in JavaScript?

      How to Answer

      This question asks you to detail the process you use to perform a specific operation within a software programming language. During an interview, you should listen carefully to each question the interviewer asks. Always make sure that the interviewer completes the question before you begin to formulate your answer. This will ensure that you respond to the right question and provide the interviewer with the information they are seeking.

      Written by William Swansen on March 25th, 2021

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  • Operational

    5. How would you implement Dijkstra's Shortest Path using a programming language with which you are familiar?

      How to Answer

      When asked about how you would implement a procedure or perform an operation, the interviewer hopes to learn more about how you go about doing the job for which you are interviewing. This is known as an operational question. When answering an operational question, you should step the interviewer through the process briefly and directly. It may help break the process down into smaller steps to help the interviewer better understand your methodology. You should be prepared for follow-up questions any time you answer an operational question.

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  • Operational

    6. How do you go about organizing CSS files, and why do you prefer this approach?

      How to Answer

      This is an example of an operational question that has technical aspects to it. The interviewer is interested in learning more about how you go about doing your job related to this specific topic. No two interviewers are the same, so the questions you will be asked may vary from interview to interview. The best way to prepare for this is to research the company, review your resume, and spend some time reviewing the operations you perform and the technologies with which you work.

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  • Operational

    7. Walk me through the steps to build a single page application with multiple sections using the programming framework in which you typically work.

      How to Answer

      You can often identify the type of question you're being asked by how the interviewer asks it. When you hear a phrase such as 'walk me through the steps...,' you know that this is an operational question. The best way to respond to this sort of question is to break down the process into individual steps and briefly describe each one. The interviewer at Facebook will likely ask you a follow-up question so they can better understand your methodology, so come prepared with a few examples.

      Written by William Swansen on March 25th, 2021

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  • Operational

    8. What process do you use to test and find bugs in an application you've developed?

      How to Answer

      The Facebook interviewer will likely ask a series of questions regarding your process because they seek to understand the steps you generally take in scenarios such as this one. As an experienced software engineer, you should be able to easily describe the procedures you use to test and debug the application you develop. Since this is an operational question, your answer should be direct and to the point. You should anticipate follow-up questions.

      Written by William Swansen on March 25th, 2021

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  • Operational

    9. Which do you prefer - a micro-service approach or a monolithic app?

      How to Answer

      When asking about a preference, the interviewer is seeking to understand how you approach your work. Your response to this question is based on two factors. The first is your experience and skill set in this job. The second is the research you have done about Facebook and your understanding of their preferences for the type of operations they perform. Your answer can either align with Facebook's processes or conflict with them. If you choose to conflict with them, you should be able to rationalize your answer based on your experience.

      Written by William Swansen on March 25th, 2021

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  • Operational

    10. How do you go about addressing errors in your code?

      How to Answer

      Nobody is perfect, even the highly-skilled software engineers Facebook hires. Every software engineer has errors in the code they create. Denying this will be a red flag, which will make the interviewer skeptical of your qualifications. A better approach to answering this question is to acknowledge that you make errors, and you have a process you use to identify and correct them.

      Written by William Swansen on March 25th, 2021

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  • Operational

    11. Describe the process you use to create a program, from requirements definition to delivery.

      How to Answer

      When the interviewer asks you to describe a process, they are seeking to understand how you go about doing your job. When preparing for these types of questions, you should review the job description to fully understand the position's requirements and how the organization will expect you to do your job. You should also review the processes you currently use to ensure they align with this role's requirements. Your answer should describe each step of the process in a sequential manner. Make sure to keep your response simple and to the point.

      Written by Audra Kresinske on March 25th, 2021

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  • Operational

    12. Walk me through your process for designing scalable applications.

      How to Answer

      A Facebook interviewer will ask this type of question to understand how you go about doing your job. When asked to walk somebody through the process you use, you should divide it into several distinct steps and briefly describe each one. Be careful not to talk too much or over complicate your answer. If the interviewer needs more details, they will request them.

      Written by William Swansen on March 25th, 2021

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  • Situational

    13. How would you accelerate the response time of a website you created for us here at Facebook?

      How to Answer

      When conducting an interview, hiring managers like the ones at Facebook are interested in one of three things - how you can help their organization make money, save money, or save time. The questions they ask will be specific to these objectives. You can prepare for the interview by understanding the organization's mission, the role of the job you are interviewing for, and how you can help them achieve one of these three objectives. In this case, the interviewer is seeking to understand how you can save time.

      Written by William Swansen on March 25th, 2021

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  • Situational

    14. Can you describe a tough software development problem you encountered in your last job and discuss how you solved it?

      How to Answer

      This is an experience-based question. Experience-based questions ask about a specific situation and seek to understand how you resolved it. This provides the Facebook interviewer with information about your background and your ability to do the job. When responding to this type of question, keep your answer simple using plain language the interviewer is likely to understand.

      Written by William Swansen on March 25th, 2021

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  • Technical

    15. Can you define black box testing and white box testing and discuss the differences between them?

      How to Answer

      Often during an interview, you are asked to define two terms used in the job and contrast them. This is an example of that type of question. When practicing interview questions, you'll note that your response is typically structured in a specific way. This makes responding to questions during the interview easier because you don't have to think about how to structure your answer. In this case, you want to first define each term and then describe the differences between them. You may also want to provide an example of how the concepts are used and the work you do.

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  • Technical

    16. What are the differences between an array and a stack?

      How to Answer

      This technical question is asking you to compare two concepts used in the role of a Facebook software engineer. When comparing two concepts, you should first define each of them and then discuss how they differ. It may be helpful if you provide examples of how the concepts are used and the work you do to demonstrate your understanding of the subject matter.

      Written by William Swansen on March 25th, 2021

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  • Technical

    17. Facebook web developers are incorporating HTML5 in their most recent websites. Can you describe the functions of web workers in HTML5?

      How to Answer

      When interviewing for a software engineering position at Facebook, the interviewer will ask various types of technical questions. These can range from very simple to very complex. Typically, the interviewer will start with simpler questions and progress to more complex ones. This indicates they are gaining confidence in your ability to do the job and are willing to explore your background in more detail. Regardless of their complexity, technical questions should always be answered briefly and to the point. You should anticipate follow-up questions any time you provide an answer to the interviewer.

      Written by William Swansen on March 25th, 2021

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  • Technical

    18. What are the differences between blocking and non-blocking calls in the context of Node.js?

      How to Answer

      During an interview as a software engineer, you can anticipate that most questions will be technical or operational. The best way to prepare for this type of interview is to first conduct research on the company to understand the type of programming they do and the products they produce. Next, you should carefully review the processes you use as a software engineer to develop programs. Having a clear understanding of these will help you respond to any question the interviewer may ask.

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  • Technical

    19. What are some of the programming languages you are familiar with, and which ones do you prefer?

      How to Answer

      This is a general question that an interviewer at Facebook will ask to determine your proficiency in programming, and whether the languages you prefer are the same ones Facebook uses. During an interview, you will be asked a mix of general, operational, technical, and behavioral questions. Interviewers will ask these in random order, so you need to be prepared for each type of question.

      Written by William Swansen on March 25th, 2021

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  • Technical

    20. Please describe a stack and the two operations it performs.

      How to Answer

      When the Facebook interviewer asks you to describe something, you should immediately identify the question as being technical. When responding to a technical question, you first define the term or concept and then describe how it is used in the work you are performing. If the interviewer asks you follow-up questions, they are expressing a strong interest in this topic and indicating that it is important to their operations. This is a signal for you to expand on your answer and give them more details than you normally would.

      Written by William Swansen on March 25th, 2021

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  • Technical

    21. Please describe responsive design and the difference between fixed and fluid layouts.

      How to Answer

      You should immediately recognize this is a technical question. Technical questions ask you to define a term or concept and then discuss how it is used in your work. When responding to this question, you should be brief and to the point. The interviewer at Facebook will request additional information if they need it. You should also provide an example if possible to further demonstrate your knowledge of the subject.

      Written by William Swansen on March 25th, 2021

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  • Technical

    22. Here at Facebook, we have embraced Agile methodology. How experienced are you with the Agile software development process?

      How to Answer

      This question is asking about your familiarity with a specific process used in software development. It may be a follow-up question to a previous answer you provided the interviewer. When asked this type of question, you should first define the concept or topic and then explain how it is used in your job. This will demonstrate your knowledge of the subject and your experience employing it in the work you do.

      Written by Audra Kresinske on March 25th, 2021

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  • Technical

    23. Can you describe Facebook's software development life cycle, as you understand it?

      How to Answer

      This is an example of a hybrid operational and technical question. It asks you to define a concept relative to this profession and describe how you go about doing this job. When answering these types of questions, you should be direct and to the point. The Facebook interviewer is likely to ask several follow-up questions to explore this topic in more detail. Your answer should also be aligned with the requirements for this job, as defined in the job posting.

      Written by William Swansen on March 25th, 2021

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  • Technical

    24. What do you look for or check when reviewing another team member's code?

      How to Answer

      This is a hybrid question, which has elements of both operational and technical questions. Since both operational and technical questions are responded to directly and succinctly, your answer should be the same. This question's broad nature also indicates that the interviewer will likely ask a follow-up question regardless of how you respond to their original question.

      Written by Audra Kresinske on March 25th, 2021

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  • Technical Engineer

    25. What do you feel are the critical principles of good software engineering?

      How to Answer

      This is a general question that asks you to characterize what makes a software program efficient and effective. Your ability to do this will help the interviewer at Facebook understand your qualifications for the position. Your answer should incorporate both the requirements for the job, as stated in the job description, and your previous experience writing code. You should limit your answer to two to three important principles and anticipate a follow-up question from the interviewer.

      Written by William Swansen on March 25th, 2021

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  • Technical Engineer

    26. How would you go about explaining Facebook's cloud computing environment to someone who doesn't have a technical background?

      How to Answer

      The purpose of this question is to gain an understanding of your communication skills. Throughout the interview, the hiring manager will seek to understand some of the soft skills you have that pertain to this job. These include communication, teamwork, conflict resolution, and others. Every time you answer a question, you are being evaluated for both your experience and skills as well as your ability to communicate. This question relates directly to this objective.

      Written by William Swansen on March 25th, 2021

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  • Facebook
    Account Manager Interview Questions

    27. What does it mean to use a consultative approach with clients?

    28. How do you build good client relationships?

    29. How would your coworkers describe you?

    30. Describe a time when you had to deal with a challenging client. How did you handle this?

    31. How knowledgeable are you about Facebook's advertising platform?

    32. Talk about a time when you helped your team execute a marketing strategy.

    33. What does customer service mean to you?

    34. If we hired you, what would you do during your first 30 days?

    35. Can you tell me how do you deal with stress?

    36. What is your ideal work environment?

    Facebook
    Internship Interview Questions

    37. What do you do to stay motivated?

    38. What research methods are you familiar with?

    39. What is your favorite Facebook group or page?

    40. What would you change about Facebook?

    41. How do you build professional relationships?

    42. How do you deal with conflict in the workplace?

    43. Can you walk me through your education and tell me how it's going to help you succeed as an intern here?

    44. Besides Facebook, what is your favorite social media platform?

    45. Where do you see yourself in 5 years?

    46. How will this internship prepare you for your career goals?

    Facebook
    Java Developer Interview Questions

    47. Since many Facebook applications are developed using Java. can you tell me what the key elements of the Java programming language are ?

    48. Within Java, what are the differences between Path and Classpath variables?

    49. Can you discuss the importance of the main() method in Java?

    50. How is Enum used in Java?

    51. In your opinion, Is Java Pass By Value or Pass By Reference?

    52. Can you define the final keyword in Java?

    53. How is a volatile keyword used in Java?

    54. Can you discuss what a static import is and what the pitfalls of using this are?

    55. Facebook developers usually write their programs using Java. Can you describe how access modifiers are used in Java?

    56. What is Composition, as used in Java?

    Facebook
    Market Specialist Interview Questions

    57. What is your experience working with cross-functional teams?

    58. How do you identify "good" vs. "bad" users?

    59. How do you prioritize tasks?

    60. What if a government official asks you to remove a post ?

    61. How do you identify a FB account created by underage children?

    62. How would you rate your problem-solving abilities?

    63. Are you comfortable working with large data sets?

    64. What types of abuse cases are you familiar with?

    65. Tell me about yourself.

    66. Why are you leaving your current role?

    Facebook
    Marketing Interview Questions

    67. Describe a marketing campaign or initiative you’ve worked on from start to finish. How were you successful? How could you have done better?

    68. How well do you take criticism?

    69. If hired, what will be your contribution to our team culture?

    70. Have you ever been in a challenging team situation? What did you do to move towards a resolution?

    71. Why is Facebook the best social media platform?

    72. Describe your own personal experience on Facebook.

    73. Tell me what you know about Facebook EdgeRank? Why does it matters?

    74. What would you do in the first 30 days of working at Facebook?

    75. Describe the personality of a manager you’d never want to work for.

    76. Describe your typical workday.

    Facebook
    Product Manager Interview Questions

    77. Facebook Product Managers work with cross-functional teams of engineers, designers, data scientists, and researchers to build products. Talk about your cross-functional work experience and how it will benefit our world-class team.

    78. Facebook is hiring an entrepreneurial Product Manager who moves quickly and can help innovate and drive product initiatives. Give us an example of a time when you acted as a highly entrepreneurial PM.

    79. Facebook Product Managers lead and motivate while maintaining team health. If hired, how will you develop rapport and earn the trust of your new team?

    80. We seek candidates with at least five years of product management or related industry experience. Please take a few minutes to walk us through your resume and related experience.

    81. Facebook Product Managers should have a Bachelor of Arts or a Bachelor of Science in a relevant field. Please walk us through your education.

    82. Facebook Product Managers are expected to display strong leadership, organizational, and execution skills. How do you maintain the highest standards during project delivery?

    83. As a Product Manager, you are the primary driver for identifying significant opportunities and driving product vision, strategies, and roadmaps. Talk about your proudest time developing, implementing, or managing a new service or strategic program.

    84. As a Facebook Product Manager, you will deliver products aligned with our mission and goals. What do you know about Facebook's mission and strategic competitive position?

    85. Facebook Product Managers work to maximize efficiency in a constantly evolving environment where the process is fluid and creative solutions are the norm. Please share your favorite approach to maximizing team efficiency.

    86. Walk us through your experience going through an entire product lifecycle.

    Facebook
    Program Manager Interview Questions

    87. What type of pace do you try to set for yourself and the teams you work with?

    88. What does a successful mentoring relationship look like?

    89. What qualities of a company's culture do you appreciate the most?

    90. What qualities of a company's culture would be a red flag for you?

    91. What is your upward communication style?

    92. How can you help to facilitate "executive synthesis" as a program manager at Facebook?

    93. At Facebook, we ask that our program managers develop domain expertise. Please describe your process for obtaining the domain specific knowledge required for the role.

    94. Facebook program managers are "go-to" individuals who bridge groups together. What steps would you take to establish yourself in that role?

    95. Describe a time when the data-driven analysis you performed informed an impactful decision.

    96. Describe your experience leading enterprise operations initiatives.

    Facebook
    Recruiter Interview Questions

    97. As a Facebook Recruiter, you should have a broad understanding of human resources topics and recruitment best practices. Walk us through your related education and training, and describe how it will benefit you in this role.

    98. Facebook is looking for a Recruiter with a proven track record of building strong working relationships with leaders and influencing cross-functional partners. Do you consider yourself a persuasive person?

    99. As a Facebook Recruiter, you will know how to prioritize business needs and push back on stakeholders when appropriate. Tell us about a time when you influenced hiring practices.

    100. Facebook seeks a Recruiter experienced in partnering with hiring managers, interviewers, and team members throughout the hiring process. How do you help your current company to make sound hiring decisions?

    101. Facebook Recruiters are consultative in nature and leverage their interpersonal experience to communicate across all levels of the organization, internally and externally. In which ways do you act as a partner and consultant to your colleagues?

    102. Recruiting in the technology industry requires a broad depth of knowledge. As a Facebook Recruiter, you may be recruiting for a position with which you are unfamiliar. How do you quickly learn industry terminology for roles that are new to you?

    103. Facebook is looking for a Recruiter with experience mapping target companies, leveraging open source communities, and using creative sourcing techniques. Tell me about a time when you utilized your industry network to source exceptional talent.

    104. Facebook seeks a Recruiter with impactful and strategic diversity sourcing and recruiting experience. If hired, how will you help Facebook continue to improve its diversity recruitment plan?

    105. Facebook seeks a Recruiter with a proven interest in learning to identify and engage diverse talent. Name one creative idea you have that could enhance Facebook's diversity recruitment strategy.

    106. Facebook Recruiters must have an in-depth knowledge of full-cycle recruitment. Please walk us through your experience in full-cycle recruitment, including sourcing, screening, engaging, and closing candidates.

    Facebook
    Software Engineer Interview Questions

    107. What are some of the programming languages you are familiar with, and which ones do you prefer?

    108. If hired by Facebook, can you estimate what portion of your day will involve coding and other activities you will perform when not coding?

    109. Facebook is very proud of our products and the people who develop them. In your opinion, what distinguishes a great software engineer from an average one?

    110. What do you look for or check when reviewing another team member's code?

    111. What do you feel are the critical principles of good software engineering?

    112. Walk me through your process for designing scalable applications.

    113. Describe the process you use to create a program, from requirements definition to delivery.

    114. How do you go about addressing errors in your code?

    115. Can you describe Facebook's software development life cycle, as you understand it?

    116. Here at Facebook, we have embraced Agile methodology. How experienced are you with the Agile software development process?

    Facebook
    Technical Program Manager Interview Questions

    117. What excites you about working as a technical program manager at Facebook?

    118. Describe a time when you identified a new product, project, or program.

    119. What are the main components of a program-level technology roadmap?

    120. At Facebook, part of our mission is to uplift the world through safe and inclusive communities. How would you contribute to the development of a safe and inclusive community within the teams you work with?

    121. At Facebook, part of our mission is to help others nurture connections. How would you develop healthy connections with your stakeholders?

    122. What is Facebook Marketplace and how is it used?

    123. Describe your experience managing technology programs and leading cross-functional teams.

    124. Describe your experience with managing system analysis and design initiatives.

    125. What level of engineering experience do you have?

    126. What is the concept of scalability in a technical setting?