Is boolean a data type?
What is complete binary tree and almost complete binary tree?
What is difference between hashset and treeset?
Differentiate between singly and doubly linked lists?
How will you check the validity of an expression containing nested parentheses?
Which is faster hashmap or hashtable?
an array of size N in which every number is between 1 and N, determine if there are any duplicates in it. You are allowed to destroy the array if you like. [ I ended up giving about 4 or 5 different solutions for this, each supposedly better than the others ].
Is file a data structure?
Which is the parent class of printerstatereasons class?
Which sort show the best average behavior?
Can we change the size of an array at run time?
Does hashset allow duplicates?
Is bubble sort faster than selection sort?