Given a positive number n. The task is to check if the mirror image of the number is equal to given number or not if displayed on Seven Line Segment. A mirror image of a number is a reflected duplication of the number that appears almost identical but is reversed in the direction perpendicular to the mirror surface.Examples:...

Given a string S. Print the lexicographically smallest string possible. You can make minimal changes to the characters in the string and you can permute the string. Examples:...

Given an integer ‘n’, write a Python function that returns true if binary representation of x is palindrome else return false. Examples:...

Given a number n as a string, find the nth even-length positive palindrome number ....

Given a string of lowercase letters. Find minimum characters to be inserted in the string so that it can become palindrome. We can change the positions of characters in the string....

Given a string str of small alphabetic characters other than this we will be given many substrings of this string in form of index tuples. We need to find out the count of the palindromic substrings in given substring range....

Given a binary string, count minimum number of subsequences to be removed to make it an empty string....

Given string str, the task is to check if it is possible to split the given string S into three palindromic substrings or not. If multiple answers are possible, then print the one where the cuts are made the least indices. If no such possible partition exists, then print “-1”....

Given string str, the task is to find the minimum number of characters to be inserted to convert it to a palindrome....

Given an array arr[] consisting of N integers, the task is to find the array K[] of minimum possible length such that after performing multiple mirror operations on K[], the given array arr[] can be obtained....

I am a final year student of IIT Guwahati and the first phase of placements has just finished at our college. I was recruited by Directi but not before three grueling rounds of interview. I was also shortlisted by Microsoft, Facebook and Goldman Sachs as well but got rejected after the first round of interview from all the three companies :(. I will be posting questions relating to all the companies I was interviewed by as well as some interview preparation advice (which should be particularly useful for students sitting for on-campus placements). Following are Facebook interview questions...

Given a string, find the longest substring which is a palindrome. For example, if the given string is “forgeeksskeegfor”, the output should be “geeksskeeg”....