Meta Coding Interview Questions (2026 Guide)
Meta builds products used by billions — and their interviews reflect exactly that. Every problem has a social graph underneath it: connections, feeds, recommendations, search.
This guide breaks down 500 real Meta interview questions: which patterns dominate, the exact difficulty mix, the top 20 problems you should solve right now, and a focused 30-day plan to get you ready.
This guide breaks down 500 real Meta interview questions: which patterns dominate, the exact difficulty mix, the top 20 problems you should solve right now, and a focused 30-day plan to get you ready.
📋 Table of Contents
Overview: What Meta Actually Asks
Based on 500 real interview questions from Meta, here's what you need to know:
Difficulty Breakdown:
Easy: 24% (118 questions)
Medium: 62% (309 questions)
Hard: 15% (73 questions)💡 Key Insight
Meta is heavily Medium-weighted at 62% — the highest among FAANG alongside Amazon. The bar isn't extreme difficulty but speed and accuracy on mediums. If you can't solve a medium in under 25 minutes cleanly, that's where to focus.Top 10 Patterns Asked at Meta
| Rank | Pattern | Frequency | Questions |
|---|---|---|---|
| 1 | Array | 47.8% | 239 |
| 2 | String | 27.6% | 138 |
| 3 | Hash Table | 17.6% | 88 |
| 4 | Two Pointers | 16.8% | 84 |
| 5 | Dynamic Programming | 13.8% | 69 |
| 6 | Math | 13.2% | 66 |
| 7 | Tree | 13.0% | 65 |
| 8 | Depth-First Search | 13.0% | 65 |
| 9 | Binary Tree | 13.0% | 65 |
| 10 | Sorting | 10.8% | 54 |
Pattern Strategy
- Master patterns 1–3 first — covers ~40–50% of Meta questions
- Patterns 4–7 are your "insurance" — covers another 20–30%
- Patterns 8–10 are bonus for senior roles or hard rounds
Top 20 Meta Interview Questions
The most frequently asked and recent problems from Meta, grouped by difficulty:
🟢 Easy
| # | Problem | Patterns | Link |
|---|---|---|---|
| 1 | Valid Word Abbreviation | Two Pointers, String | LeetCode → |
| 2 | Valid Palindrome II | Two Pointers, String, Greedy | LeetCode → |
| 3 | Diameter of Binary Tree | Tree, DFS, Binary Tree | LeetCode → |
| 4 | Two Sum | Array, Hash Table | LeetCode → |
| 5 | Best Time to Buy and Sell Stock | Array, Dynamic Programming | LeetCode → |
| 6 | Valid Parentheses | String, Stack | LeetCode → |
🟡 Medium
| # | Problem | Patterns | Link |
|---|---|---|---|
| 1 | Minimum Remove to Make Valid Parentheses | String, Stack | LeetCode → |
| 2 | Binary Tree Vertical Order Traversal | Hash Table, Tree, DFS | LeetCode → |
| 3 | Lowest Common Ancestor of a Binary Tree III | Hash Table, Two Pointers, Tree | LeetCode → |
| 4 | Kth Largest Element in an Array | Array, Divide and Conquer, Sorting | LeetCode → |
| 5 | Binary Tree Right Side View | Tree, DFS, BFS | LeetCode → |
| 6 | Basic Calculator II | Math, String, Stack | LeetCode → |
| 7 | Lowest Common Ancestor of a Binary Tree | Tree, DFS, Binary Tree | LeetCode → |
| 8 | Find Peak Element | Array, Binary Search | LeetCode → |
| 9 | Nested List Weight Sum | DFS, BFS | LeetCode → |
| 10 | Random Pick with Weight | Array, Math, Binary Search | LeetCode → |
🔴 Hard
| # | Problem | Patterns | Link |
|---|---|---|---|
| 1 | Merge k Sorted Lists | Linked List, Divide and Conquer, Heap | LeetCode → |
30-Day Meta Prep Plan
Week 1–2 Core Patterns (Focus on Top 3)
- Daily Goal: 2–3 problems from #Array, #String, #Hash Table
- Day 1–7: Solve 15–20 easy/medium problems
- Day 8–14: Re-solve Day 1–7 problems from memory (spaced repetition)
- Track: Tag all problems with "Meta" in DSAPrep.dev
Week 3 Mixed Difficulty Practice
- Daily Goal: 1 easy (warm-up) + 1–2 medium (challenge)
- Morning: Review problems from Week 1–2 (DSAPrep "Due Today" queue)
- Afternoon: Solve 2 new Meta-tagged problems
- Evening: Watch one mock interview video (YouTube: "Meta interview")
Week 4 Mock Interviews & Hard Problems
- Monday/Wednesday/Friday: Full mock (2 problems, 90 mins total)
- Tuesday/Thursday: Solve 1 hard problem + review weak patterns
- Saturday: Review ALL problems from this month
- Sunday: Rest or light review
Self-Assessment — by end of Week 4 you should:
- ✅ Solve 70%+ Meta easy problems in <10 mins
- ✅ Solve 50%+ Meta medium problems in <25 mins
- ✅ Recognize top 5 patterns within 2 mins of reading a problem
- ✅ Explain time/space complexity without hesitation
What Makes Meta Interviews Unique
🔄 Iterative Problem Solving
Meta gives you a basic problem, then progressively adds constraints mid-interview. They're testing adaptability, not just correctness. Stay calm, narrate your thinking out loud, and cleanly modify your solution rather than rewriting from scratch.🌐 Graph Heavy — Know It Cold
Social networks are graphs. Friend recommendations, mutual connections, news feed ordering — all graph problems. Know BFS, DFS, shortest path (Dijkstra, BFS on unweighted), and connected components fluently before walking in.⚙️ Practical Design Awareness
Even pure coding rounds touch on design thinking at Meta. When relevant, mention "At scale, I'd use a hash map here instead of a nested loop" or "This could be cached to avoid recomputation." It signals seniority.⚡ Move Fast, Stay Correct
Meta's culture values speed and correctness together. Don't overthink the setup — start coding quickly, but cleanly. Sloppy fast code is worse than clean fast code. Aim for both.How to Track Your Meta Prep with DSAPrep.dev
Step 1: Filter by Company
- Open DSAPrep.dev → Filter by "Meta"
- See all Meta-tagged problems in one focused view
Step 2: Track Pattern Coverage
- Dashboard shows: "Meta Tree Problems: 6/25 done (24%)"
- Prioritize patterns with low coverage % first
Step 3: Schedule Reviews
- Every Meta problem auto-scheduled for spaced repetition review
- "Due Today" queue keeps you consistent daily
- After 3–5 reviews, patterns become automatic muscle memory
Step 4: Mock Interview Mode
- Pick 2 random Meta mediums
- Set timer for 45 mins each
- Practice adapting your solution when you add a new constraint mid-solve
Common Mistakes in Meta Prep
⚠️ Mistake 1: Only Solving Meta-Tagged Problems
Why it fails: LeetCode company tags are often incomplete or outdated.
Better: Learn the patterns Meta favors, then solve ANY problem in those patterns. Pattern fluency > memorizing specific questions.⚠️ Mistake 2: Freezing When Constraints Change
Why it fails: Meta deliberately adds follow-up constraints to test adaptability. Candidates who rewrite from scratch or freeze lose significant time.
Better: Practice "constraint injection" — after solving a problem, add a random constraint yourself and modify your solution. Train the muscle.⚠️ Mistake 3: No Spaced Repetition
Why it fails: You solve 50 problems but forget 40 by interview day.
Better: Review problems 3–5 times over 2–4 weeks. DSAPrep.dev automates this scheduling for you.Conclusion: Your Meta Interview Roadmap
Today
- Add the top 5 Meta problems above to DSAPrep.dev
- Identify your weakest pattern from the top 10 list
This Week
- Solve 10–15 problems in your weakest pattern
- Practice adding a constraint after every medium solve and adapting your solution
This Month
- Complete 60–80 Meta-tagged problems
- Run 3–4 timed mock interviews with follow-up constraint practice
- Review every problem at least twice using spaced repetition
🚀 Start Today
You'll recognize graph patterns instantly. You'll adapt cleanly when constraints change. You'll pass because you prepared strategically — not randomly.→ Start Tracking Meta Prep on DSAPrep.dev (Free)