✅ Top 10 Coding Interview Questions (2025) 💼👨‍💻

1️⃣ Subarray with given sum 
Find continuous subarray that sums to a target value.

2️⃣ Count triplets with given sum 
Find triplets in array whose sum equals a target.

3️⃣ Kadane’s Algorithm 
Find maximum sum subarray in O(n).

4️⃣ Missing number in array 
Find the one number missing from 1 to N.

5️⃣ Sort an array of 0s, 1s and 2s 
Dutch National Flag problem — sort in a single scan.

6️⃣ Depth First Traversal (Graph) 
Traverse graph nodes using stack or recursion.

7️⃣ Topological Sort 
Order nodes in a Directed Acyclic Graph (DAG).

8️⃣ Activity Selection (Greedy) 
Select max non-overlapping activities.

9️⃣ Longest Increasing Subsequence (DP) 
Find length of longest increasing subsequence in array.

🔟 N-Queen Problem (Backtracking) 
Place N queens on an N×N board so none attack each other.

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