How to Revise DSA for Interviews in a Short Amount of Time
If your interviews are near and you don’t have much time left, the best way to quickly revise Data Structures and Algorithms (DSA) is to use InterviewBit.
I personally like it more than any sheet. The question list is extremely curated and structured in increasing difficulty, and the platform enforces tight time and memory limits — meaning you can’t get away with brute-force or unoptimized code.
Why InterviewBit Works So Well
- It’s topic-wise — Arrays, Strings, Linked Lists, Trees, Graphs, DP, and more.
- Every problem builds upon the previous one.
- Editorials are clean and to the point.
- Only optimized solutions pass — perfect for real interview conditions.
If you’ve already done DSA once and just want a strong revision before interviews, InterviewBit gives the best return on your time investment.
How to Approach Revision Efficiently
Here’s how you can complete your DSA revision even if you have just 10–15 days before your interviews:
- Day 1–2: Arrays, Strings, Hashing
- Day 3–4: Linked Lists, Stacks, Queues
- Day 5–6: Trees (Binary + BST), Recursion
- Day 7–8: Graphs, BFS/DFS, Topological Sort
- Day 9–10: Dynamic Programming and Greedy
- Day 11–12: Practice Mock Tests / Random Mixed Questions
Track Your Weak Areas
After every topic, note down questions you couldn’t solve on your own. Maintain a revision notebook or Google Doc for those problems.
Before the interview week, go through only these weak questions again — this gives you maximum output with minimal time.
Mix LeetCode With It (Optional)
If you want variety after InterviewBit, you can quickly solve 1–2 LeetCode medium questions per topic to stay confident with syntax and implementation speed.
- LeetCode Problems
- Sort by frequency — focus on most asked in interviews.
Right Before the Interview
- Revise core patterns — sliding window, binary search, recursion, two pointers, DP states.
- Revisit your most solved topics; don’t start new ones.
- Get enough sleep — a fresh mind is better than an extra 5 questions solved at midnight.