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Meta Front End Interview Questions

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Find the latest version of this page on GreatFrontEnd's Meta Front End Interview Guide.

Meta does not delete leaked questions from its question bank. Working through the top 100–250 Meta-tagged LeetCode questions is a high-leverage prep strategy. Frontend pipeline interviews are FE-focused: candidates have reported being caught off guard by JS-utility-style questions like Event Emitter and classnames when expecting pure DSA.

JavaScript coding questions​

  • Implement an Event Emitter (Emitter Pattern).
  • Implement classnames — combine class names from strings, arrays, and conditional objects.
  • Implement a Decryption class — focuses on managing async operations and a callback queue. The provided decryptEncrypt(key, payload, callback) generates a new key per call; your class must enqueue callbacks and process them in order as decryption completes. (The name is misleading — it's an async-operations question, not a security question.)
  • Find the identical DOM node in two identical trees: given a node in one tree, locate the equivalent node in the other tree by reference. Efficient solution: walk up via parentNode, record the path, then replay the path in the other tree (avoids touching unrelated nodes vs. DFS/BFS).

User interface coding questions​

  • Sticky ads on scroll: implement an ad element that follows the user as they scroll. Throttle is preferred over debounce here because the ad must reposition during the scroll, not after it ends.

System design questions​

  • Design a Data Table component (frequent FE system design round).
  • Design Autocomplete (common Meta system design question).
  • Design a News Feed (Facebook-style).
  • Use the RADIO framework to approach Meta FE system design rounds.

Insider tips from the GreatFrontEnd community​

These tips were shared by GreatFrontEnd users who have completed interviews with Meta.

22nd May 2025:

17.5 mins to solve per question. and there are 2 questions in a 40 mins round. Meta asks variants. 😢

31st Jan 2025:

I did meta last year. It was 2 leetcodes for frontend positions.

7th Jan 2025:

No, every company has preselected questions in a question bank. Google will delete leaked questions, Meta does not.

If you do the top 100/250 of Meta leetcode questions, you have a really good chance at getting one of the questions during the interview.

11th May 2024:

Appreciate the response! I interviewed with Meta and was caught off guard with Emitter Pattern & Classnames fn when I expected DSA 😦

23rd Apr 2024:

Hi, if you are in the front end pipeline, the questions will be focused on front end. For me, I am interviewing for IC 4/5. I have gone through a phone screen and the onsite was 4 rounds: 2 coding, 1 BQ and 1 system design. The coding is similar to the type of js questions on GreatFrontEnd and for system design, I used the RADIO framework to approach it. If you are interviewing for IC6 and above, I think you will need to go through one more design round but one less coding The next step is team matching. It could take a while, so it depends

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