Round 1: Online Coding Round conducted on HackerEarth platform. The test was of 1hr 15min. It comprised of 8MCQ questions and 3 programming questions. MCQ questions were on Java and C++. Basic OOPs and algorithm questions (no negative marking).
The three programming questions were:
Question1: Given an integer n, denoting an n*n empty matrix. You are given K tasks, in each task you are given a cell(i,j) where cell(i,j) represents the ith row and jth column of the given matrix.
For each task, you have to place X in each cell of row I and each cell of column j. You are required to print empty cells after each task, in the matrix.
Input: 3 3 1 1 1 3 3 2 Output: 4 2 0
Question 2: Given, a string S of length n and only lowercase letters, you have to perform q queries, each having two spaced separate integers l and r. For each query, you have to print the number of substrings in string S that start and end with the same character.
Input: 6 4 abcaab 1 1 2 5 3 6 1 6 Output: 1 5 5 10
Question 3: Another question based on performing queries in an array, which I don’t remember clearly. Unfortunately, I wasn’t selected for the further rounds.
Hope this information helps.