Can arraylist hold duplicates?
Can we sort hashmap?
Is a hashset ordered?
What is default size of hashmap?
What is sort order?
Does hashmap maintain insertion order?
What is the slowest sorting algorithm?
Explain the most efficient method to reverse a linked list?
What is a threaded binary tree? Explain its operation with example?
How do you insert a new item in a binary search tree?
Do you know what is linear search?
What is the use of substring?
What is the difference between file structure and storage structure?
Name few concurrent collection classes?
What is bubble sort in data structure?