Can a tree be empty?
Is json a data structure?
What do you mean by Base case, Recursive case, Binding Time, Run-Time Stack and Tail Recursion?
What is the difference between hashset and arraylist?
Define a tree?
What is an expression tree?
Is selection sort greedy?
How do you find the time complexity of a bubble sort?
How do you find the number of comparisons in bubble sort?
What is non linear structure?
Define an equivalence relation?
What is a circular singly linked list?
Differentiate between queue and deque.