Why arraylist is not efficient for manipulation?
Define rehashing?
Can a null element added to a treeset or hashset?
How does sort function work?
What are priority queues?
Is copyonwritearraylist thread safe?
Can we store a string and integer together in an array?
Treemap orders the elements on which field?
which is the simplest file structure? (Sequential, indexed, random)
What stack means?
What is the advantage of circular linked list?
Define a stack?
How does a dynamic array work?