← Data Structures & Algorithms learning pathData Structures & Algorithms · Module 10 of 10
Problem-solving patterns and interviews
Apply DSA to solve problems confidently.
📖 Key ideas
- Understand the problem; work examples by hand.
- Start with brute force, then optimise.
- Common patterns: two pointers, sliding window, binary search, BFS/DFS, DP, greedy, backtracking.
- Analyse time and space complexity aloud.
- Practise consistently: topic-wise, then mixed problems.
💡 Real-life example: Problem patterns are cricket shots: practise each one, then pick the right shot for every ball.
Brute forceTry all possibilities
Dynamic programmingReuse solutions of subproblems
GreedyChoose the best local option
BacktrackingTry and undo choices