Can a tree be empty?

821

What are the disadvantages of linked list?

862

Differentiate between hashset and treeset.

944

What are the disadvantages array implementations of linked list?

880

Define a priority queue?

1052

Write a data structure for a queue.

1171

How do you find the second largest element in an array of integers?

1001

How do you solve a selection sort?

829

What is data structure in programming language?

861

What is rule regarding overriding equals and hascode method?

869

What is the order of b tree?

892

What will you prefer for traversing through a list of elements between singly and doubly linked lists?

880

Questions related to arrays, such as given a 2 integer array, find the common elements.

878

an array t[100] which contains numbers between 1..99. Return the duplicated value. Try both O(n) and O(n-square).

872

Differentiate between set and map.

1068