Meta SDE1 Interview Guide
Evidence-backed preparation playbook for Meta SDE1 interviews. 3 reported questions, top topics, difficulty breakdown, and a free assessment.
Know your gaps before the interview
Answer 10 questions from this exact pool. Get a personalised readiness score for Meta SDE1 and a focused study plan targeting only your weak areas.
Top Questions — Ranked by Community Votes
These 3 questions appeared most in Meta SDE1 reports. Master these first.
Tell me about a time you had to make a decision with incomplete data. Meta values moving fast — how did you balance the need for speed against the risk of being wrong? What would you do differently today?
Given a social graph, find all users within K hops of a given user. Implement BFS with a visited set. Then discuss how you would scale this to Meta's 3 billion user graph using partitioning.
Given an array of N integers, find the maximum product subarray. Explain why you need to track both the maximum and minimum product ending at each position, and handle zeros and negative numbers.