Given a string, return true if after jumbling/rearranging the characters of the string will it be a palindrome. and false if not. eg: given string "evlel", it can be rearranged to "level" and thus it is a palindrome, and return true. eg: 1234 cannot be rearranged to become a palindrome hence false.
Find the max k elements in an unsorted array.
Given two strings, find if they differ by exactly two letters.
Write a function to tell if three points are colinear.
Merge to sorted arrays into second array, both arrays has N elements, but second array size is N * 2. So you merge both arrays in second array in a sorted way.
Write a piece of code to find the square root of a number.
How do you find the middle of a linked list, rounding up in the case of an odd number of items but with no differentiation between an even or odd number?
Design a stack that has an O(1) max() method.
The second question is that there are 8 buttons, 7 of them are some, one is a bit little heavier, and you have a balance, how could find the heavier one, you can just use the balance twice.
You have 4 aces and a king in a set of cards, what's the probability of get kind before all aces.
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