29 Toughest Questions Asked in Facebook Job Interviews

Brain-scratching puzzles as well as technical questions for you!


Mark Zuckerberg created Facebook 11 years ago with an aim to connect the college students. Today, apart from connecting the college students and obviously many others, it’s one the favorite places to work at in the tech industry.

The interns working at Facebook make $25,000 more than the average US citizen. Also, the employees on Glassdoor voted Facebook as the #1 company to work for. But, getting a job there isn’t an easy job. To accomplish that, you’ll have to answer some tricky Facebook interview questions to prove your caliber.

Most of the questions are inclined towards the technical side. We have collected some of the toughest questions asked from Glassdoor and many of these are extra-challenging.

Let’s take a look at these Facebook interview question for different jobs:

Recommended: Toughest interview questions asked at the biggest tech companies

Question #1

There is a building with 100 floors. You are given 2 identical eggs. How do you use 2 eggs to find the threshold floor, where the egg will definitely break from any floor above floor N, including floor N itself.

(Data Scientist candidate)

Question #2

If you were going to redesign an ATM machine, how would you do it? 

(Product Designer Candidate)

Question #3

How many birthday posts occur on Facebook on a given day?

(Data Scientist Candidate)

Question #4

Do you think that Facebook should be available to China?

(User Operations Analyst candidate)

Question #5

How much do you charge to wash every window in Seattle? 

(Online Sales Operations Candidate)

Question #6

Describe how the website works. (That’s the whole question, with no context.)

(Technical Project Manager Candidate)

Question #7

How much money is spent on the internet?

(Account Manager Candidate)

Question #8

How would you design a simpler TV remote control?

(Product Designer Candidate)

Question #9

How do you deal with communicating less than favorable information?

(Training Candidate)

Question #10

You’re at a casino with two dice, if you roll a 5 you win, and get paid $10. What is your expected payout? If you play until you win (however long that takes) then stop, what is your expected payout? 

(Data Scientist Candidate)

Question #11

You have two light bulbs and a 100-story building. You want to find the floor at which the bulbs will break when dropped. Find the floor using the least number of drops.

(Software Engineer Candidate)

Question #12

How would you set up an interview in this room? 

(Content Producer Candidate)

Question #13

How many vacuums are there in the USA? 

(Risk Analyst Candidate)

Question #14

What options do you have, nefarious or otherwise, to stop people on a wireless network you are also on (but have no admin rights to) from hogging bandwidth by streaming videos? 

(Production Engineer Candidate)

Question #15

How many Big Macs does McDonald sell each year in the US?

(Data Scientist Candidate)

Question #16

How would you build Facebook for blind people? 

(Product Manager Candidate)

Question #17

Tell me your plan of action if you saw that photo uploads suddenly dropped by 50%.

(Operations Associate User Intelligence Candidate)

Question #18

A Russian gangster kidnaps you. He puts two bullets in consecutive order in an empty six-round revolver, spins it, points it at your head and shoots. *click* You’re still alive. He then asks you, do you want me to spin it again and fire or pull the trigger again. For each option, what is the probability that you’ll be shot? 

(Internet Marketing Analyst Candidate)

Question #19

Should Facebook continue to add features or rely on 3rd party apps?

(Product Designer Candidate)

Question #20

If you were an animal what kind would you be and why?

(User Operations Analyst Candidate)

Question #21

What are you least proud of on your resume?

(Media Solutions Specialist Candidate)

Question #22

Given access to all the data Facebook collects, what would you do with it?

(Product Analytics Candidate)

Question #23

Pre-IPO, they asked me to write a paper on the valuation of Facebook. They also asked me what I thought the greatest technological advancement was in the past 20 years. 

(Software Engineer Candidate)

Question #24

If you have 100 credit card numbers (and all info) how would you make as much $ possible in 24 hours using only online transactions? (Many follow-up questions of how to get around certain fraud deterrents.) 

(Ads Risk Associate Candidate)

Question #25

You are trying to rob houses on a street. Each house has some amount of cash. Your goal is to rob houses such that you maximize the total robbed amount. The constraint is once you rob a house you cannot rob a house adjacent to that house.

(Software Engineer Candidate)

Question #26

The most difficult question was the 8-hour test, which involved deriving a novel and fairly-involved algorithm, significant CSS/HTML/JS coding, and plenty of opportunities to get something subtly wrong.

(User Interface Engineer Candidate)

Question #27

25 racehorses, no stopwatch. 5 tracks. Figure out the top three fastest horses in the fewest number of races.

(Software Engineering Summer Intern Candidate)

Question #28

What is the process you would go about in spotting a fake profile?

(User Operations Analyst Candidate)

Question #29

You’re about to get on a plane to Seattle. You want to know if you should bring an umbrella. You call 3 random friends of yours who live there and ask each independently if it’s raining. Each of your friends has a 2/3 chance of telling you the truth and a 1/3 chance of messing with you by lying. All 3 friends tell you that ‘Yes’ it is raining. What is the probability that it’s actually raining in Seattle?

(Data Scientist Candidate)

Ishu Luthra

Ishu Luthra

Social Media Manager and Tech Journalist at Fossbytes For relevant queries, contact me at [email protected]
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