What is an expression tree?
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Define 2-3-4 tree?
How to get top two numbers from an array?
How do you determine if a binary tree is height balanced?
What are the types of linked list?
Why null is allowed in hashmap?
How arraylist increase its size?
What is arrays copyof?
How do hash tables work?
Write an algorithm to check if there is a loop in a doubly linked list.
Can we create a null as a key for a map collection?
What are linked lists used for?
ple.. briefly describe the purpose of having a base case and a recursive case in a recursive algorithm