DSA_basics.txt

30 Basic DSA Questions - Very Easy Level

ARRAYS
1. Find the largest element in an array
2. Find the smallest element in an array
3. Reverse an array
4. Calculate the sum of all elements in an array
5. Count occurrences of a specific element
6. Check if an array is sorted

STRINGS
7. Reverse a string
8. Check if a string is a palindrome
9. Count vowels in a string
10. Convert a string to uppercase/lowercase
11. Find the length of a string without using built-in functions
12. Check if two strings are anagrams

LINKED LIST
13. Traverse and print all nodes of a linked list
14. Find the length of a linked list
15. Insert a node at the beginning of a linked list
16. Delete the first node of a linked list
17. Search for an element in a linked list

STACK & QUEUE
18. Implement a stack using an array (push & pop)
19. Implement a queue using an array (enqueue & dequeue)
20. Check for balanced parentheses using a stack

SEARCHING & SORTING
21. Linear search in an array
22. Binary search in a sorted array
23. Bubble sort an array
24. Find the second largest element in an array

RECURSION
25. Find the factorial of a number using recursion
26. Find the nth Fibonacci number using recursion
27. Calculate the sum of digits of a number recursively

TREES
28. Find the height of a binary tree
29. Count the number of nodes in a binary tree
30. Print all leaf nodes of a binary tree