Facebook Software Engineer Interview Questions

Updated Apr 4, 2015
Updated Apr 4, 2015
102 Interview Reviews

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Software Engineer Interview

Accepted Offer
Positive Experience
Average Interview
Accepted Offer
Positive Experience
Average Interview

Application

I applied in-person. The process took 2 weeksinterviewed at Facebook (Ann Arbor, MI) in September 2014.

Interview

Met at career fair and talked with a recruiter. Received an email to do an onsite interview. Within a couple days of the interview I was asked to attend a Campus day (on site) and was given a couple of possible dates. FB arranged flights and hotels (really really nice hotels) for the visit. Offers were extended within a week of the interview

Interview Questions

  • Find lowest common ancestors of a tree given nodes.   1 Answer

Other Interview Reviews for Facebook

  1. Helpful (16)  

    Software Engineer Interview

    Accepted Offer
    Positive Experience
    Average Interview
    Accepted Offer
    Positive Experience
    Average Interview

    Application

    I applied through a recruiter. The process took 4+ weeksinterviewed at Facebook (Menlo Park, CA) in July 2014.

    Interview

    I was hiring specifically for an iOS position. The recruiters start with Obj-C 5 multiple choice questions, which required some surprising depth. I won't get into specifics, but take time to understand memory management (even with arc), blocks, addresses and pointers.

    After was a phone interview which mostly involved a collaborative coding question. The questions asked here were very typical algorithmic questions, the answers usually involved a hash to cache meta values to increase performance.

    Protip: Be familiar with NSSet and NSOrderedSet. These data structures are more performant than NSArrays for some operations, and I found myself using them in almost every answer.

    Then you have an onsite visit, with 4 additional interviews: 2 coding, 1 design, and 1 "culture fit" which, for me, was really another coding interview.

    Your recruiter will contact during the next week or two afterwards to give you updates on your status. I believe there are three different meetings where your interviewing notes are reviewed and given consideration.

    Interview Questions

    • What is something other people misunderstand about you?   1 Answer

    Negotiation

    I went back and forth once between a competing company and received higher offers each time. Ask your recruiter for honest assessments of your interviews - if you did well FB will be much more willing to "one up" the competition.

  2. Helpful (2)  

    Software Engineer Interview

    Accepted Offer
    Positive Experience
    Difficult Interview
    Accepted Offer
    Positive Experience
    Difficult Interview

    Application

    I applied through an employee referral. The process took 2 weeksinterviewed at Facebook (Menlo Park, CA) in July 2014.

    Interview

    Introduced into the whole process via a referral, so I was able to move quickly to an onsite interview. This was easily the best interview experience I've had in a long time - recruiter was friendly and extremely responsive, and each of the interviews was engaged during the interview.

    Everything moved very quickly once I indicated that I felt prepared to interview.

    Interview Questions

    • Nothing terribly surprising - be prepared to talk through CS fundamentals, large scale design, and code code code.   Answer Question
  3. Helpful (4)  

    Software Engineer Interview

    Accepted Offer
    Positive Experience
    Average Interview
    Accepted Offer
    Positive Experience
    Average Interview

    Application

    I applied through college or university. The process took 2+ weeksinterviewed at Facebook (Seattle, WA) in April 2014.

    Interview

    Two interviews - one on my university campus, one on the nearest Facebook campus. Got back promptly after the second interview. The culture is amazingly open, any intern can look at any piece of code in the company - nothing is secret. Additionally a lot of trust is put in interns and employees.

    Interview Questions

    • Standard rotated binary search question. You have a sorted array that has been shifted/cycled, perform a search on it   2 Answers

    Negotiation

    No negotiation, there seemed to be a formula for salary for interns.

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  5.  

    Software Engineer Interview

    Declined Offer
    Positive Experience
    Declined Offer
    Positive Experience

    Application

    I applied through a recruiter. The process took 2+ monthsinterviewed at Facebook (Menlo Park, CA) in February 2014.

    Interview

    The interview process for me was uberly long. I wasn't planning on applying to Facebook, but a recruiter reached out to me mid-december on LinkedIn. I thought "what the heck, it's a great company" and got back to her the next day, but she was leaving for the XMas break. No more communication until early Jan. Connecting on the phone was a pain, as first she didn't call until 15 minutes after she said she would. I had stopped standing by the phone and went to email her when she did call, so missed it. We emailed and set something up for an hour later. This time she called 30 minutes late. No apologies or anything. Sigh. She advised that I put all of my other interviews before the Facebook one so that I could get practice, and then signed me up for a free interview review course they run. I went and things were all great, so I told them I was ready. Queue another 2 week pause while they tried to answer a question I had asked before scheduling me. When I finally made it onsite for an interview (mid-late feb), I had expected it to be a full day of interviewing, but instead it was a 30 minute screen before I could do the *actual* interview. In all fairness, I should have seen that coming. But anyways, did the screen and got a response before I had even left the parking that they wanted to schedule my full interview. I also got a call from my recruiter that afternoon to give me interview feedback. I thought that was awesome, as most people don't do that. I can't say how useful it was as I had no negative feedback from my interviewers and her advice was just "wow, keep doing whatever you just did!" but it sounds like it could be useful if things don't go perfectly the first time around. Anywho, by this time I had multiple other offers with deadlines on them. I went ahead and scheduled the final round interview for the following week, but ended up canceling the day before as I had decided to go with another company. This seemed to irk my recruiter, despite the fact that she was the one who told me to interview with other companies first and I had been upfront about that and the associated timelines during the whole process. When initial contact and end offer are 2.5 months apart, you can't expect someone to be sitting idle that whole time...

    The only reason I still rank this as a positive experience is because I had a secondary recruiter I worked with coordinating onsite logistics (the girl who first contacted me was out of state) and he was awesome. If any of you get the chance, work with Charlie. He's direct and super straight forward and knows that candidates are people with multiple options and treats you as such. I do a lot of mentoring and will certainly be sending any of my mentees who expresses interest in Fbook Charlie's way; he's a real gem.

    Interview Questions

    • One of the questions I got was around bit manipulation and built on itself by layers (i.e. how would you do x? ok, say you have a function for x, how would you do this new thing y?). The other question was a modification of a sorting question (i.e. the question itself was sort the array, but there were some parameters on the data type that made things extra fun/not standard sorting algorithm)   Answer Question
  6.  

    Software Engineer Interview

    Accepted Offer
    Positive Experience
    Difficult Interview
    Accepted Offer
    Positive Experience
    Difficult Interview

    Application

    I applied through an employee referral. The process took 6 weeksinterviewed at Facebook (Menlo Park, CA) in February 2014.

    Interview

    The whole process took around 6 weeks. I did my first phone screen in beginning of January and had my onsite in February. Involved algorithm and design problems. Not too hard.

    Negotiation

    It was a very good offer so din't have to negotiate

  7.  

    Software Engineer Interview

    Accepted Offer
    Accepted Offer

    Interview

    Fairly standard. 4 technical rounds and 1 phone interview in a period of 2-3 weeks. NDA got my hands tied.

    Interview Questions

  8. Helpful (3)  

    Software Engineer Interview

    Accepted Offer
    Positive Experience
    Difficult Interview
    Accepted Offer
    Positive Experience
    Difficult Interview

    Application

    I applied through an employee referral. The process took 4+ weeksinterviewed at Facebook (Menlo Park, CA) in December 2013.

    Interview

    Internal Referral -> Phone Interview -> Onsite Loop -> Offer
    The process was quick, however I interviewed before the holidays and had to wait until afterwards to hear the results. Everyone is really friendly and helpful. HR always keeps you updated on the process.

    Interview Questions

    Negotiation

    Had a competing offer from another giant so I was able to negotiate.

  9. Helpful (2)  

    Software Engineering Interview

    Accepted Offer
    Positive Experience
    Average Interview
    Accepted Offer
    Positive Experience
    Average Interview

    Application

    I applied through an employee referral. The process took 2 weeksinterviewed at Facebook (Menlo Park, CA) in December 2013.

    Interview

    I got email from the recruiter shortly after my friend in Facebook referred me. The recruiter asked me a few basic questions in the phone and arranged a phone interview. The phone interview took about 1 hour and the interviewer asked two questions. Shortly after that they told me to have an on-site interview in their campus. The on-site interview is 1-on-1 and the interviewer asked me two questions that is of average difficulty. But it is very important to communicate your solution clearly to the interviewer. Then within one week, I got the internship offer from Facebook.

    Interview Questions

    • K nearest points to the origin on a 2D plane; one-pass reverse linked list with constant space.   5 Answers
  10. Helpful (6)  

    Software Engineer Interview

    Accepted Offer
    Positive Experience
    Difficult Interview
    Accepted Offer
    Positive Experience
    Difficult Interview

    Application

    I applied through a recruiter. The process took 4+ weeksinterviewed at Facebook.

    Interview

    Whole process took about a month but that's because I request about 1 week of prep time for each stage of my interview. I had 3 on-site interviews in total - my screening was on-site because I live very close to HQ. I also did a 3rd round interview because my feedback for 2nd round was somewhat mixed. Overall, very pleased with the whole interview experience. The internal recruiter was very friendly and helpful in helping me prep, and also very communicative of each step and process that they're going through. Was never kept in the dark. Almost every interviewer was super friendly and knowledgeable. I had mix feelings before the interview but after the whole process, I was convinced that Facebook is a great place to work.

    Interview Questions

    • No question stood out as most difficult or unexpected. Just know your algorithms and data structures, as well as your specific domain knowledge.   Answer Question

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