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We are trying to list out the most frequently asked interview problems or the problem given in the coding rounds of IT giants.

questions

Title
Given a positive integer N, count all possible distinct binary strings of length N such that there are no consecutive 1\'s. Output your answer mod 10^9 + 7
Given a string str, find the longest palindromic substring. A substring need to be consecutive such that for any xixj i<j must be valid in the parent string too. Like \"incl\" is a substring of \"includehelp\" while \"iel\" is not
Given a string str, find total number of possible palindromic sub-sequences. A substring need to be consecutive such that for any xixj i<j must be valid in the parent string too. Like \"incl\" is a substring of \"includehelp\" while \"iel\" is not
Given a sequence of numbers, you have to find the maximum sum alternating subsequence and print the value
A list of n days is given to you and there are three columns. One is the day, the second one is high-effort value, and the another one is low-effort value
Given a tree, you have to find out the largest independent set. Independent elements are those that don’t have any common edges. Print the length of the largest independent set
Given a sequence of numbers you have to find out the longest alternating subsequence and print the length of the subsequence
Given a sequence of numbers you have to print the longest alternating subsequence. A sequence is an alternating sequence when it will be maintaining like, (increasing) -> ( decreasing ) -> (increasing ) -> (decreasing) or (decreasing) -> (increasing) -> (decreasing) -> (increasing)
You are trying to climb on a staircase. There are N number of steps. You can only climb one or two steps at one time. Now you have to find out the number of possible combinations to reach the final step
An N pair array is given to you. In every pair, the first number is always smaller than the second number. A pair (a,b) can follow another pair (c,d) if a is greater than d
Given a sequence of numbers you have to find out the length of the longest increasing odd even subsequence and print the length of the subsequence
You are standing in some location (x, y) on an island, given in form of a matrix of size N*M, you are allowed to move in all four directions left, right, up and down
Given N activities with their start and finish times. Select the maximum number of activities that can be performed by a single person, assuming that a person can only work on a single activity at a time
You are given a list of jobs where each job has a start time, finish time, and the profit associated with that job, find the maximum profit subset of non-overlapping jobs
Given a string, find out if the string is K-palindrome or not. A k-palindrome string transforms into a palindrome on removing at most k characters from it
You are given a staircase, you need to find the total number of ways to reach the nth stair from the bottom of the staircase when you are only allowed to climb 1, 2 or 3 stairs at a time
Given the mobile numeric keypad. You can only press buttons that are up, left, right or down to the current button. You are not allowed to press bottom row corner buttons (i.e. * and #)
You are given a set of n types of rectangular 3-D boxes, where the i^th box has length l(i), width w(i), and height h(i) (all real numbers)
You are given an array Arr, you have to find the maximum value of the expression (Arr[i1]-Arr[i2]+Arr[i3]-Arr[i4]) where i1>i2>i3>i4 and (0<=i1,i2,i3,i4<n)
Given a N X N Matrix, Matrix[N][N] of positive integers. There are only three possible moves from a cell Matrix[r][c]
total questions: 87

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