Data Structure

Array 

• Pair of array elements whose Sum equal to Target Integer
• Move all  zeroes to the end of array 
• Maximum 5 elements from 3 given Array
• Find all the duplicates in a given array

String 

• Remove Duplicate Character
• Reverse a string using pointer in C

• Reverse a String in Java using Recursion

Sorting

• External Sorting (Handy one in the case of Memory Limit )

LinkedList          

• Linked List Brush Up       
• Linked List Basic Programming Technique
• Circular Linked List Brush Up and Programming Technique
• Insert element in a sorted Circular Linked List
• Find loop in a Linked List  

• Stack Brush Up And Basic Programming Technique
• Stack Program Implementation
• Implementing Stack Using Queue
• Balancing of Brackets in Expression(Application of Stack)
• Postfix Evaluation(Application of Stack) 

Queue   

• Queue Brush Up
• Queue Program Implementation
• Implementing Queue Using Stack 

Tree

• Binary Tree Brush Up and Program  
• Level Order Traversal of binary search tree
• Count the number of nodes in a binary search tree
• Count number of leaf nodes in a binary tree

Bit Manipulation

• Power of 2