How to prepare for DSA interviews
Core rule
- Understand the problem first.
- Identify the data structure.
- Think about time and space complexity.
- Write a clean solution.
- Test with edge cases.
Common interview patterns
- Two pointers
- Sliding window
- Prefix sums
- Hash map / frequency counting
- Stack / monotonic stack
- Queue / BFS
- DFS / recursion / backtracking
- Binary search
- Dynamic programming
- Greedy choice
- Graph traversal
- Heap / priority queue
Interview answer structure
When asked a DSA question, answer in this order:
- Understand the problem.
- Clarify input and constraints.
- Choose a data structure.
- Explain the approach.
- Write code.
- Discuss complexity.
- Mention edge cases.
Can you explain it without the notes?
How to prepare for DSA interviews
Use your own words. Explain an example and one limitation before checking the explanation.
Check your explanation
Core rule
Turn this concept into a clear answer.
Practice this conceptAdapted from 14_DSA_MASTER.md · “1. How to prepare for DSA interviews”. Examples are study fragments; framework behavior can depend on your version.