Is hashmap an object?
Differentiate between iterable and iterator.
What is array simple?
What do you understand by stable sort?
Explain what is binary search?
What does abstract data type mean?
What is garbage collection in data structure?
How to copy an array into another array?
Write an algorithm to check if there is a loop in a doubly linked list.
Explain about circular linked list?
What exactly is a thread?
What is map keyset?
What is the difference between array and list?