Cracking the top 40 Facebook coding interview questions

Cracking the top 40 Facebook coding interview questions

A look at the top 40 Facebook coding interview questions and best practices for preparing strategically. Cracking the Facebook coding interview is any developer's dream. Today, we'll walk through the ins and outs of the Facebook interview with 40 ...

This article was written by Amanda Fawcett and was originally published at Educative, Inc.

Landing a job at Facebook is a dream for many developers around the globe. Facebook is one of the top tech companies in the world, with a workforce of over 52,000 strong. Facebook is known for its growth-based company culture, fast promotion tracks, excellent benefits, and top salaries that few companies can match.

But competition is fierce, and with a swell of new hires, Facebook is on the lookout for the top candidates. Facebook focuses on your cultural fit, generalist knowledge, ability to build within constraints, and expert coding skills.

To help you prepare, today I will walk through everything you need to crack an Facebook interview, including coding questions and a step-by-step preparation guide.

Today we will go over:

  • Overview of the Facebook coding interview
  • Top 40 Facebook coding interview questions
  • How to prepare for a Facebook interview
  • Wrapping up

Overview of the Facebook coding interview

To land a software engineering job at Facebook, you need to know what lies ahead. The more prepared you are, the more confident you will be. So, let’s break it down.

  • Interview Timeline: From resume submission to job offer, the process lasts 1.5 to 2 months.
  • Types of Interviews: The interview process consists of 6 to 7 interviews. This includes 1 pre-screen interview (20 minutes), 1 technical phone interview (50 minutes, 1–2 coding questions), and 4–5 on-site interviews (45 minutes each).
  • On-site interviews: Facebook breaks the on-site interviews into three sections. The Ninja portion consists of 2 coding interviews using a whiteboard. The Pirate portion includes 2 system design interviews. The Jedi portion includes 1 cultural/behavioral interview.
  • Coding Questions: Facebook interview questions focus on generalist knowledge on algorithms, data structures, and time complexity. They also test on architecture and system design (even entry level).
  • Hiring Levels: Facebook normally hires at level E3 for entry level software roles with E9 behind the height of levels. E5 is considered an entry-level manager role.
  • Hiring Teams: Central hires for Oculus, Facebook Groups, and WhatsApp.
  • Programming languages: Facebook prefers most standard languages, including Java, C++, Python, Ruby, and Perl.

What’s different about Facebook interviews?

System design interview: At Facebook though, you can expect these questions no matter what level you are interviewing for.

Structured interviewing: Facebook will pair you with interviewers who have either held the position you’re interviewing for or with individuals who work directly with the position you’re interviewing for.

Core values and your behavioral interview: Facebook interviewers will also evaluate your ability to embody their five core values: Move Fast, Be Bold, Focus on Impact, Be Open, and Build Social Value.

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