Explain pre-order and in-order tree traversal.
What is the difference between hashmap and linkedhashmap?
How null key is handled in hashmap?
Design a datastructure to represent the movement of a knight on a chess board
What is array and its types in data structure?
What is the limit of arraylist?
State the different types of linked lists?
Tell me real world example of polymorphism and encapsulation .
How can you insert a node to the beginning of a singly linked list?
How many types of sorting algorithms are there?
Is bucket sort stable?
Is arraylist faster than array?
What is mean by abstract data type?