Register for our webinar

How to Nail your next Technical Interview

1 hour
Enter details
Select webinar slot
*Invalid Name
*Invalid Name
By sharing your contact details, you agree to our privacy policy.
Step 1
Step 2
You have registered for our webinar
Oops! Something went wrong while submitting the form.
Enter details
Select webinar slot
*All webinar slots are in the Asia/Kolkata timezone
Step 1
Step 2
You are scheduled with Interview Kickstart.
Oops! Something went wrong while submitting the form.
Iks white logo

You may be missing out on a 66.5% salary hike*

Nick Camilleri

Head of Career Skills Development & Coaching
*Based on past data of successful IK students
Iks white logo
Help us know you better!

How many years of coding experience do you have?

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Iks white logo

FREE course on 'Sorting Algorithms' by Omkar Deshpande (Stanford PhD, Head of Curriculum, IK)

Thank you! Please check your inbox for the course details.
Oops! Something went wrong while submitting the form.
Our June 2021 cohorts are filling up quickly. Join our free webinar to Uplevel your career

Facebook Technical Interview Questions to Crack the Coding Interview

Last updated on: 
September 6, 2023
Dipen Dadhaniya
The fast well prepared banner
About The Author!
Dipen Dadhaniya
Dipen Dadhaniya
Engineering Manager at Interview Kickstart. A passionate and versatile web developer packed with full-stack development skills and a curiosity to explore computer languages.

Cracking technical interviews at FAANG companies is often seen as a daunting challenge even for experienced programmers. A popular opinion within the programming community is that Facebook has the toughest and most demanding interview-testing standards in the tech world.

For all you aspiring Facebookers, cracking the Facebook interview isn’t going to be clear sailing. By employing a dedicated and structured learning approach, however,  an offer from your favorite company can be well within reach.

Here's what this article entails:

1. Facebook Interview Questions on Data Structures, Systems Design and Algorithmic Coding

  • 1.1 Technical and Coding Questions
  • 1.2 Behavioral Questions

The Facebook coding interview tests candidates on a diverse set of skills, with the interview typically consisting of 3 rounds viz.

  • The Phone-Screen
  • Technical On-Site
  • Behavioral Rounds. 

Technical questions asked are usually based on  common programming concepts such as Data Structures, Algorithms and Systems Design. 

These categories have equal representation in the interview, and candidates are required to solve complex coding problems by applying these concepts.  

In this article, we’ll look at the most commonly asked Facebook technical Interview Questions to crack the Facebook coding interview. 

Facebook Interview Questions on Data Structures, Systems Design and Algorithmic Coding

Technical and Coding Questions

  1. Given two large strings A and B, multiply the strings and return the result “R” as a string. 
  2. Write a program to add two binary strings A and B. 
  3. Write a program function to check if a given Binary Tree “A” is a valid Binary Search Tree.
  4. Write a code to find the longest increasing subsequence for an array of integers, “A”. 
  5. For a given array “A” where the nth element is the price of a stock on the nth day of the month, write an algorithm to find the maximum profit during the month. 
  6. For a given integer array “A” and an individual integer “K”, write a program to find the total number of subarrays where all elements are lesser than the value of integer K. 
  7. For a given histogram where the largest rectangle can be formed by clubbing contiguous bars, write a program to find the largest area that can be formed. 
  8. Write a program to find the minimum and maximum depth for a given Binary Tree “X”. 
  9. Explain the different types of greedy algorithms and their core functions. 
  10. For a given string containing integers and alphabets in random order, write a program to print all the alphabets in order followed by the product of all mentioned digits. 
  11. For two separate Linked Lists representing two positive integers, if each of their nodes contain separate digits themselves, add the two numbers and return the result as a Linked List. 
  12. For an Unordered Binary Tree with two given values, write a code to find the Lowest Common Ancestor.
  13. Design a comprehensive Distributed Key Value Store that is tolerant to network partitions.
  14. Explain the procedure to design a Web Search Engine. 
  15. Explain the procedure to design a URL Shortener.
  16. Explain why Greedy Algorithms are more efficient than Dynamic Programming in solving complex graphs problems. 
  17. For a given dictionary that is represented by a grid MxN wherein every cell has a single character, write a code to get all possible words that can be constructed through a series of adjacent characters.
  18. For a given set of integers read from a particular data stream, write a code to find the Median. 
  19. Write a code to find out if a given string AB is a K-Palindrome or not. 
  20. For a given array represented by a positive number, write a program to find the largest subset in the array where all the elements are numbers in the Fibonacci Sequence. 
  21. For a given string “S”, write a program using Recursion to find out whether it contains an additive sequence. Note that a string must contain a minimum of 3 digits for it to possess an additive sequence.
  22. What are Binary Trees and Slacks? Explain with examples.
  23. Explain the steps involved to perform popular sorting techniques including Insertion Sort, Merge Sort, Quick Sort and Heap Sort. 
  24. For “n” number of sorted arrays of varying sizes, write a program to find the mth smallest value in the newly merged array.
  25. Write an algorithm to find the number of ways to travel “N” metres by doing jumps of 1,2,3,4 and 5 metres in length. 

Behavioral Questions

  1. How do you stay motivated at work?
  2. Tell us about the one project you’re particularly proud of.
  3. How do you build relationships in a workplace?
  4. Why do you think you should be hired at Facebook?
  5. Are you aware of Facebook’s culture? If yes, describe it briefly.
  6. Describe yourself from the lens of a coworker?
  7. Tell us about a time when you had a disagreement with your superior.
  8. How would you go about resolving conflict between two subordinates?
  9. What do you think are the most important challenges Facebook will face in the coming years?
  10. What was your biggest challenge in preparing for this role?
  11. What is your opinion on vacations impacting productivity at work?
  12. Tell us about a time when you had to access important information from a colleague who was uncooperative?
  13. How do you deal with negative feedback at work? Tell us about a time you made improvements after receiving feedback on your work?
  14. Tell us about a time when you were under pressure to deliver a project on time. How did you handle it?
  15. What is your take on team-building exercises and routine outings with your team?

Additional Reading: Understand the interview processes at other FAANG Companies! Check out our Interview Guides for:

Want to get started with your interview prep? Sign-up for our free Webinar today!

Posted on 

Dipen Dadhaniya

Engineering Manager at Interview Kickstart

Attend our Free Webinar on How to Nail Your Next Technical Interview


Worried About Failing Tech Interviews?

Attend our webinar on
"How to nail your next tech interview" and learn

Hosted By
Ryan Valles
Founder, Interview Kickstart
blue tick
Our tried & tested strategy for cracking interviews
blue tick
How FAANG hiring process works
blue tick
The 4 areas you must prepare for
blue tick
How you can accelerate your learnings
Register for Webinar

Recent Articles