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Company-Wise LeetCode Questions: Google, Amazon, Meta, Apple, More

By DSA Prep Team · February 15, 2026 · 22 min read
If you've spent months grinding LeetCode randomly, you've probably noticed something frustrating: the questions you practiced don't match what companies actually ask in interviews.

This guide is built on data from 10,385 real interview questions across 259 companies. You'll learn exactly what each top company asks, what patterns they love, and how to build a targeted 30–60 day prep plan—so you stop wasting time and start interviewing smarter.

📋 Table of Contents

Why Company-Wise Prep Matters

Here's the truth most people learn too late:

This isn't speculation. It's data from 10,385 real interview questions asked across 259 companies, with timestamps showing what was asked in the last 6 months.

In this guide, you'll learn:

  1. What each top company actually asks (with data)
  2. Pattern preferences by company
  3. Difficulty mix expectations
  4. How to build a targeted 30–60 day prep plan
  5. How DSAPrep.dev tracks company-wise progress

The Data: What We Analyzed

We compiled 10,385 verified LeetCode questions tagged by company and timeframe:

Company Category Companies Total Questions
FAANG/MAANG Amazon, Google, Meta, Apple, Microsoft 2,322
Banks & Quant Goldman Sachs, Bloomberg, Citadel, DE Shaw, JPM 1,349
Unicorn Startups DoorDash, Airbnb, ByteDance, Databricks 581
Top Tech LinkedIn, Adobe, Atlassian, IBM 980

Timeframe breakdown:

💡 Key Insight

Companies recycle core questions but the frequency and emphasis changes. Knowing what's hot right now gives you a measurable edge over candidates preparing blindly.

Company-Wise Breakdown: The Big 5 (FAANG/MAANG)

1. Amazon (500 Questions Analyzed)

Pattern DNA:

Top 5 Patterns:
1. Trees & Binary Search Trees  (18%)
2. Arrays & Strings             (16%)
3. Design / OOP                 (14%)
4. Graphs                       (12%)
5. Linked Lists                 (11%)

Difficulty Mix:

What This Means:

Amazon loves practical problems. Expect:

🎯 Pro Tip

Amazon interviews mention Leadership Principles even in coding rounds. If asked "Tell me about a time...", they're testing Ownership, Bias for Action, and Customer Obsession — not just your code.

→ See Amazon Top 20 Questions

2. Google (500 Questions Analyzed)

Pattern DNA:

Top 5 Patterns:
1. Graphs & Advanced Search     (22%)
2. Dynamic Programming          (18%)
3. Arrays                       (15%)
4. Math & Logic                 (12%)
5. Backtracking                 (10%)

Difficulty Mix:

What This Means:

Google wants you to optimize and scale. Expect:

🎯 Pro Tip

Google cares about complexity analysis more than perfect syntax. Be ready to discuss time/space trade-offs fluently — interviewers will push you on this every round.

→ See Google Top 20 Questions

3. Meta (Facebook) (500 Questions Analyzed)

Pattern DNA:

Top 5 Patterns:
1. Graphs                       (20%)
2. Hash Maps & Sets             (17%)
3. Trees                        (15%)
4. Arrays & Strings             (14%)
5. Backtracking                 (11%)

Difficulty Mix:

What This Means:

Meta = social graphs. Everything connects. Expect:

🎯 Pro Tip

Meta loves iterative problem-solving. They give you a basic problem, then progressively add constraints. Stay calm, adapt cleanly, and narrate your thinking out loud.

→ See Meta Top 20 Questions

4. Apple (375 Questions Analyzed)

Pattern DNA:

Top 5 Patterns:
1. Arrays & Strings             (24%)
2. Trees                        (16%)
3. Linked Lists                 (14%)
4. Hash Maps                    (12%)
5. Sorting & Searching          (11%)

Difficulty Mix:

What This Means:

Apple tests fundamentals deeply. Expect:

🎯 Pro Tip

Apple interviewers ask about trade-offs even on easy problems. "Why hash map over sorting?" Know the reasoning behind every choice you make — not just the solution.

→ See Apple Top 20 Questions

5. Microsoft (447 Questions Analyzed)

Pattern DNA:

Top 5 Patterns:
1. Arrays & Strings             (20%)
2. Dynamic Programming          (16%)
3. Trees                        (14%)
4. Graphs                       (12%)
5. Linked Lists                 (11%)

Difficulty Mix:

What This Means:

Microsoft is balanced and practical. Expect:

🎯 Pro Tip

Microsoft loves real-world examples. Relate your solution to actual systems — caching, search, file systems. It shows product thinking, which they value as much as raw coding skill.

→ See Microsoft Top 20 Questions

Banks & Quant Firms: The Finance Tech Edge

Goldman Sachs (325 Questions)

Pattern Focus

What's Different:

→ See Goldman Sachs Top 20 Questions

Bloomberg (433 Questions)

Pattern Focus

What's Different:

→ See Bloomberg Top 20 Questions

Citadel & DE Shaw (215 & 211 Questions)

Pattern Focus

What's Different:

→ See Citadel Top 20 Questions  |  → See DE Shaw Top 20 Questions

Unicorn Startups: Speed & Practicality

DoorDash (234 Questions)

Pattern Focus

Real-World Slant:

→ See DoorDash Top 20 Questions

Airbnb (132 Questions)

Pattern Focus

Real-World Slant:

→ See Airbnb Top 20 Questions

The 20 Most Asked LeetCode Questions Globally

Beyond company-specific patterns, some problems appear so frequently across all companies that mastering them is non-negotiable. These 20 problems were identified from our full dataset of 10,385 verified interview questions across 259 companies — ranked purely by total appearance count.

💡 Why This List Matters

These aren't just popular on LeetCode — they are the problems that keep showing up in actual interviews at Google, Amazon, Meta, Goldman Sachs, Citadel, and 250+ more companies. If you're short on time, master these 20 first.
# Problem Difficulty Appearances Companies Core Pattern
1 Two Sum Easy 302 92 Hash Map
2 Best Time to Buy and Sell Stock Easy 230 84 Greedy / Sliding Window
3 Valid Parentheses Easy 191 73 Stack
4 Reverse Linked List Easy 157 64 Linked List
5 Binary Search Easy 119 47 Binary Search
6 LRU Cache Medium 116 50 Design / Hash Map + DLL
7 Trapping Rain Water Hard 100 42 Two Pointers / Stack
8 Number of Islands Medium 92 44 DFS / BFS / Union Find
9 Group Anagrams Medium 91 38 Hash Map / Sorting
10 Longest Palindromic Substring Medium 89 38 Two Pointers / DP
11 3Sum Medium 85 36 Two Pointers / Sorting
12 Search in Rotated Sorted Array Medium 68 26 Binary Search
13 Maximum Subarray Medium 66 23 Dynamic Programming
14 Merge Sorted Array Easy 65 26 Two Pointers
15 Longest Common Prefix Easy 62 24 Strings
16 Container With Most Water Medium 62 25 Two Pointers / Greedy
17 Climbing Stairs Easy 60 25 Dynamic Programming
18 Spiral Matrix Medium 60 24 Matrix / Simulation
19 Rotate Image Medium 60 20 Matrix / Math
20 Median of Two Sorted Arrays Hard 59 21 Binary Search / Divide & Conquer

What the Difficulty Mix Tells You

Of the top 20 globally asked problems, 7 are Easy, 11 are Medium, and only 2 are Hard. This confirms a key insight: companies don't gate-keep with Hard problems as often as people fear. They use well-known Medium problems to test how you think — your approach, your communication, and your ability to handle edge cases cleanly.

⚠️ Don't Skip the Easy Problems

Seven of the top 20 most asked problems are rated Easy — but companies use them to test code quality, edge case handling, and communication, not just correctness. A sloppy solution to Two Sum will cost you an offer just as much as a wrong solution to a Hard problem.

Pattern Breakdown of the Top 20

Two Pointers / Greedy      5 problems  (#2, #7, #10, #11, #14, #16)
        Dynamic Programming        3 problems  (#10, #13, #17)
        Binary Search              3 problems  (#5, #12, #20)
        Hash Map / Sets            3 problems  (#1, #6, #9)
        Matrix / Simulation        2 problems  (#18, #19)
        Stack                      1 problem   (#3)
        Linked List                1 problem   (#4)
        Graphs / Union Find        1 problem   (#8)
        Strings                    1 problem   (#15)

✅ Takeaway: 4 Patterns Cover 75% of the Top 20

If you deeply master Two Pointers, Dynamic Programming, Binary Search, and Hash Maps, you can confidently attempt 15 of the top 20 most asked problems globally. These four patterns are your highest-ROI investment for any company interview.

How to Use This Data: Your 30–60 Day Company-Specific Plan

Step 1: Pick Your Target Companies (Max 3)

Don't try to prepare for 15 companies. Pick 1–3 targets based on where you're actually interviewing.

Example Split

Step 2: Analyze Pattern Overlap

Use DSAPrep.dev to filter by multiple companies and see pattern intersections. Google + Amazon overlap heavily on Trees, Graphs, and Dynamic Programming. Master those = prepare for both simultaneously.

Step 3: Solve Problems in This Order

Week 1–2 Core Patterns (40 problems)

Week 3–4 Company-Specific Mix (40 problems)

Week 5–6 Mock Interviews (20 problems)

Step 4: Track Pattern Coverage

Use the DSAPrep.dev dashboard to see:

Common Mistakes in Company-Wise Prep

⚠️ Mistake 1: Only Solving Company-Tagged Problems

Why it fails: LeetCode company tags are often outdated or incomplete.

Better approach: Learn the patterns the company favors, then solve any problem in that pattern. Pattern recognition > memorizing questions.

⚠️ Mistake 2: Ignoring Timeframes

Why it fails: A question asked 3 years ago may not reflect current interview trends.

Better approach: Prioritize last 6 months data. Use older questions only for pattern practice.

⚠️ Mistake 3: Skipping Behavioral Prep

Why it fails: At Amazon, Apple, and banks, behavioral fit matters as much as coding.

Better approach: Prepare STAR stories for each company's values — Amazon LP, Apple's attention to detail, Goldman's analytical rigor.

⚠️ Mistake 4: Not Using Spaced Repetition

Why it fails: You solve 50 Amazon questions but forget 40 of them by interview day.

Better approach: Use DSAPrep.dev to schedule reviews. Solving once ≠ learning.

How DSAPrep.dev Helps: Company-Wise Tracking

DSAPrep.dev company filter dashboard

1. Company Filters

2. Smart Review Scheduling

3. Pattern Heatmaps

DSAPrep.dev leetcode spaced repetition tracker dashboard

4. Progress Dashboards

Your Next Steps

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Conclusion: Stop Random Grinding, Start Strategic Prep

The difference between candidates who pass and those who don't isn't intelligence or hours spent. It's strategic focus.

Company-wise prep means:

🚀 Start Today

Pick your target company, filter by patterns, and solve smarter—not harder.

→ Try DSAPrep.dev Free (50 Problems)