Meta Coding & Algorithms Interview Questions

Preparing for Meta Coding & Algorithms interview questions requires focusing on algorithmic problem solving, writing production-minded code, and communicating tradeoffs under time

302 Questions 1 Company07.06.2026
Showing 20 results
Role
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Medium
Software EngineerSenior+ AI

Solve Parser, Trading, Tree, And Deck Tasks

You will solve several independent programming tasks. For each task, implement clean, tested code and state the time and space complexity. 1. Validate...

Coding & Algorithms
5
0
37 people solved
Apr 9, 2026
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Meta
Medium
Software Engineer Locked

Validate Sorted Order Under a Custom Alphabet

This question evaluates a candidate's ability to apply custom ordering rules and string comparison logic, a common variant of array and string validat...

Coding & Algorithms
2
0
18 people solved
Jun 20, 2026
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Meta
Medium
Software Engineer Locked

Find Shortest Unique Prefixes

This question evaluates string-processing skills and understanding of data structures for prefix management (e.g., tries), along with algorithmic effi...

Coding & Algorithms
2
0
14 people solved
Jun 18, 2026
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Meta
Medium
Data Engineer

Solve SQL and Python coding tasks

You are given a small library system with the following relational schema and several Python data-processing tasks. Answer the SQL questions and imple...

Coding & Algorithms
64
5
429 people solved
Nov 20, 2025
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Meta
Medium
Software Engineer Locked

Palindrome After Deleting at Most One Character

This question evaluates a candidate's ability to reason about two-pointer string traversal and palindrome verification under a single edit constraint....

Coding & Algorithms
1
0
15 people solved
Jun 20, 2026
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Meta
Medium
Software Engineer

Select words to maximize unique characters

Problem You are given an array of strings words. You may choose any subset of these strings and concatenate the chosen strings in any order. Your goal...

Coding & Algorithms
38
0
516 people solved
Dec 15, 2025
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Meta
Medium
Software EngineerSenior+ AI

Solve Three Coding Interview Problems

The interview included three coding tasks: 1. Common ancestor in an N-ary tree You are given the root of an N-ary tree and two target nodes. Dete...

Coding & Algorithms
4
0
53 people solved
Feb 2, 2026
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Meta
Medium
Software Engineer

Implement BFS-based maze solver

Maze Printing and BFS Solver You are given a 2D grid representing a maze. Each cell of the grid is one of: - '#' – wall (cannot be passed) - '.' – emp...

Coding & Algorithms
33
0
327 people solved
Dec 7, 2025
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Meta
Easy
Software Engineer

Implement four coding challenges

You are asked to solve the following four independent coding problems. --- 1) Block Placement Simulator (Tetris-like) You have an empty n x m grid (ro...

Coding & Algorithms
9
0
84 people solved
Feb 8, 2026
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Meta
Medium
Machine Learning EngineerIntern AI Locked

Implement Sparse Matrix Operations

This question evaluates proficiency in sparse linear algebra, efficient algorithms, and data-structure design for numerical and machine learning workl...

Coding & Algorithms
6
0
52 people solved
Feb 8, 2026
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Meta
Medium
Machine Learning Engineer

Solve linked list, tree, and grid problems

Problem A — Find cycle entry in a singly linked list You are given the head of a singly linked list. The list may contain a cycle. - Return the node w...

Coding & Algorithms
15
0
107 people solved
Dec 15, 2025
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Meta
Medium
Software Engineer

Count Distinct Values in a Sorted Array When K Is Small

Count Distinct Values in a Sorted Array When K Is Small Given an integer array sorted in nondecreasing order, return the number of distinct values. Le...

Coding & Algorithms
1
0
12 people solved
Mar 2, 2026
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Meta
Medium
Machine Learning Engineer

Find target using robot movement API

You control a robot in an unknown 2D grid. The grid layout and boundaries are unknown, and you cannot access the map directly. Some cells are blocked ...

Coding & Algorithms
13
0
100 people solved
Oct 30, 2025
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Meta
Medium
Software EngineerSenior+ AI

Build a FastAPI summarization service

Implement a minimal but production-ready FastAPI service for text summarization. Requirements: - Expose an endpoint POST /summarize. - The request bod...

Coding & Algorithms
5
0
52 people solved
Jan 19, 2026
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Meta
Medium
Software Engineer Locked

Compute Exclusive Execution Times

This question evaluates understanding of nested function execution and precise exclusive-time accounting derived from chronological logs, emphasizing ...

Coding & Algorithms
0
0
15 people solved
May 25, 2026
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Meta
Medium
Software EngineerSenior+ AI

Solve Maze and Suffix Problems

Solve the following two coding problems. Problem A: Find the shortest path through a maze with keys and doors You are given a 2D grid representing a m...

Coding & Algorithms
1
0
18 people solved
Apr 25, 2026
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Meta
Medium
Software Engineer

Resolve a cd Path Against the Current Directory

Resolve a cd Path Against the Current Directory Implement path resolution for a simplified Unix-like cd command. cwd is a normalized absolute path. ar...

Coding & Algorithms
0
0
12 people solved
Mar 2, 2026
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Meta
Hard
Data Engineer

Write SQL for car rental utilization by city

SQL / Data Query Prompt (Car Rental) You are given four tables: user - user_id location - location_id - city car - car_id - car_size (e.g., compact, m...

Coding & Algorithms
12
2
183 people solved
Dec 1, 2025
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Meta
Medium
Software EngineerSenior+ Locked

Solve Tree Diameter and Palindromic Counts

This two-problem prompt evaluates proficiency in tree algorithms and recursion for computing longest paths in binary trees, along with string processi...

Coding & Algorithms
2
0
17 people solved
May 21, 2026
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Meta
Medium
Software EngineerSenior+ AI Locked

Solve Tree Columns And Maze Variants

This question evaluates tree traversal and column-based grouping skills along with grid-based graph search, state modeling, and handling dynamic maze ...

Coding & Algorithms
2
0
22 people solved
May 21, 2026

Frequently Asked Questions

How difficult are Meta Coding & Algorithms interview questions?
Meta Coding & Algorithms questions are typically rated medium to hard and often grow tougher as you progress through rounds. Early screens usually aim to confirm correct problem solving and implementation ability, while onsite interviews expect robust algorithmic thinking, time and space optimality, and clear communication under pressure. Interviewers evaluate how you approach unfamiliar problems, move from brute force to optimized solutions, handle edge cases, and articulate complexity trade‑offs. Preparation should target speed, pattern recognition, and producing clean, testable code that can be reasoned about aloud during the interview.
Where in Meta's interview process do Coding & Algorithms questions appear, and how are they evaluated?
Coding and algorithms questions commonly appear in phone screens, technical online assessments, and the core onsite/virtual loop; they may be mixed with product or design conversations depending on role. Evaluations focus on problem decomposition, correctness, algorithmic efficiency, and code quality. Interviewers listen for clear problem statements, thoughtful trade‑offs, and how you validate solutions against edge cases and constraints. For more senior roles, emphasis shifts to selecting the right abstractions and reasoning about large inputs and performance. Communication, testing, and the ability to iterate from a simple approach to an optimized one are all part of the score.
How should I plan my interview preparation timeline for Meta Coding & Algorithms roles?
A disciplined timeline usually spans six to twelve weeks depending on experience and starting point. Begin with two to three weeks of fundamentals: solidify data structures, complexity analysis, and core algorithms. Follow with four to six weeks of focused practice on medium and hard problems, rotating topics and timing yourself, while documenting patterns and common mistakes. In the final two weeks, emphasize mock interviews, timed coding rounds, and refining communication and testing habits. Regularly review incorrect solutions to identify recurring gaps, and incorporate at least a few live mock interviews to habituate speaking through your thought process.
What key subtopics within Coding & Algorithms should I focus on for Meta interviews?
Concentrate on arrays and strings, trees and graphs (including BFS/DFS), hash maps, two‑pointer and sliding window techniques, recursion and backtracking, dynamic programming, and sorting/search algorithms. Also prepare on complexity analysis, space‑time tradeoffs, handling NULLs and edge cases, and writing robust test cases. For higher levels, emphasize understanding of algorithmic scalability, memory layout implications, and performance tuning. Equally important are clear coding style, readable variable names, and the ability to explain why a chosen data structure or algorithm best fits the constraints of the problem.
What standout tips, common pitfalls, and final advice for Coding & Algorithms interviews at Meta?
Start each problem by asking clarifying questions and describing a brute‑force approach before optimizing. Verbally outline your plan, write clean code with basic tests, and explain complexity at the end. Common pitfalls include diving into coding without validating edge cases, ignoring constraints, and failing to communicate assumptions. Avoid overfitting to memorized problems; instead, internalize patterns so you can adapt. Use mock interviews to sharpen pacing and feedback. Finally, remain calm if stuck: state hypotheses, try small examples, and iterate—interviewers value structured thinking and recoveries as much as perfect first attempts.

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