10. Sliding Window

Top 10 DSA Questions in C#

🚀 Top 10 DSA Questions in C#

With Output

1. Reverse String

Input: "hello"
Output: "olleh"
Output: olleh

2. Palindrome

Input: "madam"
Output: Palindrome

3. Max in Array

Input: [1,5,3,9,2]
Output: 9

4. Fibonacci

n = 5
Output: 0 1 1 2 3

5. Two Sum

nums = [2,7,11,15], target = 9
Output: index 0,1

6. Remove Duplicates

Input: [1,2,2,3]
Output: 1 2 3

7. Missing Number

Input: [1,2,4,5]
Output: 3

8. Binary Search

Target = 4
Output: Found

9. Valid Parentheses

Input: "()[]{}"
Output: Valid

10. Sliding Window

Input: [2,1,5,1,3,2], k=3
Output: 9

Created by Koustubh Javheri

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DSA Easy Notes (C#)

DSA Easy Notes (C#) 🚀 DSA Easy Notes (C#) 1. Reverse String Input: "hello" Output: "olleh" Explanation: We reverse characters order. string str = "hello"; char[] arr = str.ToCharArray(); Array.Reverse(arr); Console.WriteLine(new string(arr)); Difference: Original: h e l l o Reversed: o l l e h 2. Palindrome Input: "madam" Output: Palindrome Explanation: Same forward & backward. string str = "madam"; string rev = new string(str.Reverse().ToArray()); Console.WriteLine(str == rev ? "Palindrome" : "Not"); Difference: Forward: madam Backward: madam → Same ✔ 3. Max in Array Input: [1,5,3,9,2] Output: 9 Explanation: Compare all values and keep largest. int[] arr = {1,5,3,9,2}; int max = arr[0]; foreach(int i in arr) { if(i > max) max = i; } Console.WriteLine(max); Difference: Compare: 1→5→9 → Max found = 9 4. Fibonacci Inpu...
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