Discuss how to implement queue using stack.
What are the four types of variables?
How will you check the validity of an expression containing nested parentheses?
Differentiate between singly and doubly linked lists?
When will you use array over arraylist?
What is a matrix?
What is adt and its advantages?
What is time complexity of arrays sort?
What is data structure and data type?
Why entry interface is used in map?
How do you replace an element in an arraylist?
Is arraylist faster than array?
Is arraylist synchronized?