Interview Practice
Coding Interview Practice
The coding interview tests data structures, algorithms, and clean implementation under time pressure. It is the backbone of almost every tech loop.
Start a free mockWhat the coding interview tests
- Data structures and algorithms
- Pattern recognition (two pointers, BFS/DFS, DP, etc.)
- Edge-case handling
- Clean, correct code and complexity analysis
How to prepare
- Master the core patterns rather than memorizing problems.
- Practice talking through your approach before coding.
- Always state time and space complexity.
- Do timed problems in a real editor and run against tests.
Sample coding interview questions
- Two Sum and its variants (three sum, k-sum).
- Find the number of islands in a grid (BFS/DFS).
- Longest substring without repeating characters (sliding window).
- Implement an LRU cache.
Coding Interview FAQ
How many problems should I practice?
Quality over quantity — deeply understanding ~150 problems across the core patterns beats grinding 500 shallowly. The goal is to recognize the pattern, not recall the exact problem.
Should I talk while coding?
Yes. Interviewers score communication. Narrate your approach, tradeoffs, and edge cases as you go — silent correct code scores worse than communicated correct code.
Ready to practice?
Practice the coding interview with an AI interviewer. No signup — see your score in 3 minutes.
Start a free mock interview