Some of the interesting problems from Cracking the Coding Interview and common Interview Questions found Online .
Below is the list of Problems .
Matrix Rotation by 90 degree
Loop Detection using Rabbit and Tortoise algorithm
Permutations of a String
Coin Change or make sum from subset
All subsets of an array
Find pair of sums
First recurring character in a string
Implement a queue with single stack
Sum of triplets
Maximum square of 1's in a matrix of 0's and 1's