What do you know about different sorting algorithms?
Which is faster array or arraylist?
Which is faster hashmap or hashset?
How to get top two numbers from an array?
which is the simplest file structure? (Sequential, indexed, random)
What is huffman’s algorithm?
What is difference between list and set?
Can you sort a hashset?
Why null is not allowed in treemap?
What is the best sorting technique?
What is difference between hashset and linkedhashset?
Is any implicit arguments are passed to a function when it is called?
How can you insert a node to the beginning of a singly linked list?