Reversing a doubly linked list
Given a doubly linked list. Write a function to reverse it. If given list is then output of our function should be
Gold bar puzzle
You have some work to be done by a worker in 7 days. The worker need to be paid every day after his work. The total cost of the work of 7 days is one gold bar (so every day the worker must be paid 1/7’th of the bar). You have only one gold bar, and […]
Points on globe – Interview puzzle
How many points are there on the globe, so that if you walk 1km south, then 1km east and then 1km north, you reach the place where you started.
Fastest horse Interview question
There are twenty five horses and you can conduct a race of only five horses at one time. There is no way to find out the absolute speed of a horse (we only know there relative speed). At least how many races will it take to determine the three fastest horses?
Check if two arrays are permutation of each other
Given two arrays of integers, write a code to check if one is permutation (arranging the same numbers differently) of elements present in the other. For example, the below two arrays are permutations of each other: int a[5] = {1, 2, 3, 4, 5}; int b[5] = {2, 1, 4, 5, 3};
Count all left nodes in a Binary tree
One way to ask this question is: Given a Binary tree that represent a family hierarchy. A parent can have at most two children (at most one girl child and at most one boy child). A girl child (if present) is always represented as left child in the binary tree, and a boy child (if present) […]
5 Pirates Puzzle dividing 1000 coins
There are 5 pirates, A, B, C, D and E. They have a strict hierarchy, A is senior to B, B is senior to C, C is senior to D and D is senior to E. So it is like (A > B > C > D > E). These pirates have 1000 gold coins […]
Storing Binary Tree in a file
Given a Binary tree, write two function. The first function should write the binary tree in a file and second function should read the file and should be able to construct the same binary tree. Here writing to file is not important, the important thing is to preserve the state of the Binary tree. Think […]
Keep Body Cameras Off Public-School Educators
Some of can’t rely on stable worlds economic, so learn, learn and learn everything new, this will help you anytime, dont be upset, believe yourself even in dark times!
US Teens Win International Rocketry Challenge
Throughout the United States, police officers are beginning to wear body cameras. Should principals in America’s public-school systems follow their example?
