## Serialize and Deserialize a Binary Tree

#### Posted at 6:50 pm by Keisha l, on September 23, 2016

Write code to serialize and deserialize a given binary tree.

## Compute X^Y For Floats and Negative Values

#### Posted at 6:47 pm by Keisha l, on September 23, 2016

How will you compute x^y such that it will work for floats and negative values?

## Reverse a doubly linked list

#### Posted at 6:46 pm by Keisha l, on September 23, 2016

How can you reverse a double linked list?

## Sum Up a Pair in Array

#### Posted at 6:45 pm by Keisha l, on September 23, 2016

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

#### Posted at 2:37 pm by Admin, on July 20, 2016

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

## Right Rotate an array by k elements

#### Posted at 7:13 am by Admin, on June 22, 2016

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}

## Can you forecast weather?

#### Posted at 12:57 pm by Admin, on May 13, 2016

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

## Half full

#### Posted at 12:49 pm by Admin, on May 13, 2016

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

## Upside down years

#### Posted at 3:25 am by Admin, on May 12, 2016

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

## Good (or really bad) icebreaker question

#### Posted at 3:19 am by Admin, on May 12, 2016

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