LeetCode vs Real Interview Questions: What Actually Gets Asked (2026)

LeetCode is where most people start preparing for coding interviews. It works well for one specific purpose: drilling algorithm and data structure problems. But it creates a blind spot if you treat it as your entire interview prep strategy.

Where LeetCode works

LeetCode problems are a reasonable proxy for the coding round at most companies. The question format — solve this algorithm problem in 30-45 minutes — matches what happens in a coding interview. The difficulty distribution is roughly right too: most coding rounds are LeetCode Medium level, with some Easy and occasional Hard.

Companies that lean heavily on LeetCode-style coding: Google, Meta, Amazon, Microsoft, and most startups. If your interview has a coding round, LeetCode practice helps.

Where LeetCode falls short

The problem: coding rounds are typically 1-2 of 4-6 total interview rounds. The other rounds test things LeetCode does not cover.

System design — 853 questions on PracHub. Not on LeetCode. "Design a URL shortener" or "Design Instagram" requires a completely different skill set: distributed systems knowledge, capacity estimation, tradeoff analysis. You cannot practice this on LeetCode.

Behavioral — 1,010 questions on PracHub. Not on LeetCode. Amazon asks behavioral questions in every single round. Google and Meta have dedicated behavioral rounds. Failing these can cost you an offer even if your coding is perfect.

SQL — 649 questions on PracHub. LeetCode has some SQL problems, but they do not match what data science interviews actually ask. Real SQL interviews use window functions, CTEs, and complex joins on messy data.

Machine learning — 583 questions on PracHub. Not on LeetCode. ML interviews test fundamentals, applied modeling, and system design for ML pipelines.

Product sense — 82 questions on PracHub. Not on LeetCode. "How would you measure the success of Facebook Marketplace?" requires product thinking, metrics design, and experiment design.

The numbers

Looking at the 7,589 questions on PracHub across 50+ companies:

• 33% are coding and algorithms (what LeetCode covers)
• 67% are everything else (what LeetCode does not cover)

That means if LeetCode is your only prep tool, you are prepared for roughly a third of the interview.

What real coding interviews look like vs. LeetCode

Even within coding rounds, there are differences between LeetCode problems and what companies actually ask:

LeetCode problems are self-contained. You get a clear problem statement, clear constraints, and one correct answer. The hard part is finding the right algorithm.

Real interview questions are often vague on purpose. "Process this stream of data" might have multiple valid approaches, and the interviewer wants to see how you clarify requirements and discuss tradeoffs. The algorithm is sometimes less important than your communication.

LeetCode rewards speed. Real interviews reward clarity. Talking through your approach, asking good questions, and writing clean code matters more than solving the problem 2 minutes faster.

A better preparation strategy

1. Use LeetCode for coding fundamentals. 100-150 problems is enough for most people. Focus on the patterns (two pointers, sliding window, BFS/DFS, dynamic programming) rather than memorizing solutions.
2. Use a broader platform for everything else. Practice system design with real prompts, behavioral questions with STAR-format answers, SQL with an actual query editor, and domain-specific questions for your target role.
3. Spend your time proportionally to the interview format. If your target company has 2 coding rounds and 3 non-coding rounds, spending 80% of your time on LeetCode is a bad allocation.

PracHub has all 7,589 questions searchable by company, role, and category. You can see exactly what a Google SWE interview or a Meta DS interview looks like, round by round.