How can you reverse a double linked list?

Can you find a pair in array that will sum up to particular number?

I met three dragons. One always tells the truth, other one always lies and the last one alternates between lie and truth. Dragon 1: You may ask us one question, then you must guess which dragon is which Dragon 2: He’s lying. You may get three questions Dragon 3: Oh no. It’s definitely one question

An array of elements is given arr arr is of length n Right rotate array by k elements Time complexity O(n) and space complexity O(1) Sample Input: arr = {1,2 ,3,4,5} n = 5 k = 2 Output : arr = {4,5,1,2,3}

It is raining at midnight – will we have sunny weather in 72 hours?

A half is a third of it. What is it?

When was the last year that looked the same upside down? (1961)

A book costs $1 plus half its price. How much does it cost?

Question: You have two identical eggs. Standing in front of a 100 floor building, you wonder what is the maximum number of floors from which the egg can be dropped without breaking it. What is the minimum number of tries needed to find out the solution?

Suppose you had a Stack class. Write a new class MaxStack which, in addition to push() and pop(), has a method getMax() which returns the largest item in the stack. Use your existing Stack class to store the stack’s contents. Don’t just use pop() to “dig” through your stack to find the max—do something that… Read More »