Build the right foundation
Start with arrays, strings, hash maps, stacks, queues, linked lists, trees, graphs, sorting, searching, recursion, and complexity analysis.
Use a repeatable interview process
Clarify the problem before coding, work through examples, state a simple solution, improve it, then test the final implementation.
- Restate requirements
- Ask about constraints
- Explain tradeoffs
- Test edge cases aloud
Practice communication
Interviewers evaluate how you reason as well as whether the code works. Explain assumptions, name variables clearly, and discuss time and space complexity.