Why is hashmap faster than arraylist?
what is binary tree?
How would you check if a binary tree is BST or not ? Write a program.
Why do we need sorting algorithms?
What do you mean by external sorting?
What are data structures in programming?
List out the advantages of using a linked list?
Define double hashing?
Which one is the simplest sorting in data structure?
What is a graph?
Define a set?
How will you check the validity of an expression containing nested parentheses?
How do you sort an array in descending order?