What are doubly linked lists?
When will you use array over arraylist?
Tell me do array subscripts always start with zero?
Can arraylist store primitives?
How do you implement a stack?
Which interfaces are implemented by hashmap?
What is 2 dimensional linked list?
You are given a singly linked list. How would you find out if it contains a loop or not without using temporary space?
What is the structure of an array?
How do you sort an array in decreasing order?
What is the difference between hashset and linkedhashset?
List some applications of tree-data structure?
In what areas do data structures applied?