meta interview | meta code proxy | meta system design | Interview Aids

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Meta's interview process has always been the fastest-paced and most intensive among major companies, especially for SDE positions. Today I will completely restore the Meta interview process. If you are preparing for Meta, or have already received an interview, this article can help you quickly establish an overall understanding and avoid falling behind in key rounds.

meta interview | meta code proxy | meta system design | interview cheating

Meta interview Complete process

Step 1: Screening (initial screening)This round evaluates the candidate on four dimensions: ability to parse the problem, ability to code, ability to validate the code, and ability to communicate, which is generally remote.

Once you've passed Step 1, it's time to move on to Step 2 Full Loop interviews, which are usually on-site

Coding Interviews(2-3 rounds of 45 minutes each): 3 rounds for interns and fresh grad, and 2 rounds for senior staff above E4.In Coding interviews, it may start with MEDIUM difficulty questions, but the interviewer will randomly change the requirements to increase the difficulty, such as a leetcode problem about balancing parentheses in a string. The normal practice would be to use a stack to solve it, but the interviewer will increase the difficulty by directing you to find a solution that doesn't take up extra space.

System Design Interview(1 round, 45 minutes): This round will be an in-depth discussion where the interviewer will carefully evaluate the candidate's ability to design complex systems. The content will be customized to the position applied for, whether the position is related to systems, product or front-end design. The key point of this round is that there is no single right answer, as meta's system design interviews are known for their open-endedness, allowing for a wide range of potential answers

Behaviour Interview(1 round, 45 minutes): Interviewers will dig deeper into the candidate's background, review past projects, and ask the candidate to tell stories of growth and conflict, etc.

Team MatchingAfter all the interviews, the meta will match the candidate with the right team, it's a two-way questioning and matching process to make sure the candidate is a good match for the team's skills and culture, this round is still quite important to determine if you can get into the team or product line of your choice!

Meta Interview Question

Coding 1

给定一个由左括号 、右括号 和小写英文字母组成的字符串 s,需要移除最少数量的括号(可以是左括号或右括号,位置任意),使得剩下的括号字符串是有效的,然后返回任意一个有效的结果字符串。 思路是通过两次遍历,我们以最少的删除操作确保括号合法,同时保留所有字母,最终得到有效字符串。最后的follow up问的是若存在多个有效解,如何返回所有可能的结果

Idea:By traversing twice, we ensure that the parentheses are legal with a minimum of deletion operations, while retaining all the letters to end up with a valid string. The final follow up asks how to return all possible results if there is more than one valid solution

Coding 2

Given a set of video durations and user attention durations, the requirement is to select a subset of videos such that the sum of the durations of any two consecutive videos does not exceed the user's attention duration while maximizing the total viewing duration.

Idea:We define dp[i][j] to denote the maximum viewing duration when the previous i videos are considered and the remaining attention duration is j. For state transfer, for each video, we have two choices: skipping keeps the original state; selected requires ensuring that the duration sum with the last selected video does not exceed the attention constraint, and updating the state if it is satisfied. To handle the constraints of consecutive videos, the selection history can be tracked by additionally recording the duration of the last selected video in the state, or by using an auxiliary array. The final solution is the maximum of all possible states.

Conclusion

After our strong interview assistance.OA ghostwritingThrough the analysis and communication of these interview questions, the interviewer not only understands the candidate's programming ability, but also sees my clear thinking and effective communication skills in the process of problem solving. These not only help to deal with Meta's interview, but also improve our ability to solve real programming problems. I wish you all good luck in your interviews!

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Alex Ma Staff Software Engineer
Currently working at Google, with more than 10 years of development experience, currently serving as Senior Solution Architect. He has a bachelor's degree in computer science from Peking University and is good at various algorithms, Java, C++ and other programming languages. While in school, he participated in many competitions such as ACM and Tianchi Big Data, and owned a number of top papers and patents.
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