What is difference between hashtable and hashmap?
Can a tree be empty?
Differentiate between failfast and failsafe.
Can we insert null in hashset?
What is dynamic array how is it created?
Which is the parent class of deque<e> class?
What is a hash index?
Is treemap thread safe?
What is faster array or arraylist?
Describe tree database.
What type of data structure is used to perform recursion?
What are linked lists good for?
What is the difference between set and unordered_set?