Does arraylist have index?
What is the heap in data structures?
Is hashtable better than dictionary?
What is sequential mapping in data structure?
Does concurrenthashmap allow null?
Why do we need linked list?
What is data structure and why we need it?
Explain Array of pointers?
Does hashmap preserve insertion order?
How would you check if a binary tree is BST or not ? Write a program.
Now you are given an array of a characters (both ASCII and Kanji) and, an index into the array. The index points to the start of some character. Now you need to write a function to do a backspace (i.e. delete the character before the given index).
Give the example of validating the parenthesis of expression using stack.
Why do we use trees in data structures?