Comviva Technology Interview Questions, Process, and Tips

Q1. All Related to work exp. That i had .
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Q2. Related to linux sql ,smsc,smpp,scripting
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Round duration - 150 minutes
Round difficulty - Medium

In this round, there were 4 sections of MCQs, along with two coding questions. It lasted for 2.5 hours in which the camera was on along with the microphone on the platform AMCAT. One coding question was of hard difficulty level of graph and another was of medium level difficulty question of dynamic programming. MCQ part was quite easy with a timer, on each sub part and can be easily solved.

Q1. 
Count Nodes within K-Distance Problem Statement
Given a connected, undirected, and acyclic graph where some nodes are marked and a positive integer 'K'. Your task is to return the count of nodes such that...read more
Ans. 
Step1 : I solved this problem using breadth first search.
Step 2 : Main thing to observe in this problem is that if we find two marked nodes which are at largest distance from each other considering all pairs of marked nodes then if a node is at a distance less than K from both of these two nodes then it will be at a distance less than K from all the marked nodes because these two nodes represents the extreme limit of a...read more
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Q2. 
Ways To Make Coin Change
Given an infinite supply of coins of each denomination from a list, determine the total number of distinct ways to make a change for a specified value. If making the change isn't ...read more
Ans. 
1. Firstly, I coded the problem using recursion, but I got TLE after submission.
2. Then, I optimized, using dynamic programming, but the time I could submit the code, the time was up, and I was not able to submit.
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Round duration - 30 minutes
Round difficulty - Medium

There were around 40 people shortlisted after round 1, for the interview, round, in the morning PPT was held, after which the interviews were scheduled, for 30 minutes till 6 pm in the evening, 
my interview was at 4.30 pm 
Interviewer was straight forward, and direct in approach, and did not waste even a single second of his or mine. Sharp after 30 minutes the interview was ended. 
through out the interview, he was friendly, and just observing.
Firstly, 3 coding questions, were asked, then 2 concepts of java and 1 concept of data structures was asked. 
the question related to java were, demon thread and platform independence. In data structures, I was asked to give brief intro regarding the AVL trees.

Q1. 
Count Occurrences of X in Sorted Array
Given a sorted array or list of integers with size N and an integer X, you need to determine how many times X appears in the array/list.
Input:
The first line of t...read more
Ans. 
1. I started with linear search
2. Then when I said Binary search, I was asked to write pseudo code and explain it.
3. I covered all the test cases, including the corner cases.
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Q2. 
Merge Sort Task
Given a sequence of numbers, denoted as ARR, your task is to return a sorted sequence of ARR in non-descending order using the Merge Sort algorithm.
Example:
Explanation:
The Merge Sort...read more
Ans. 
1. I was asked to directly code the solution.
2. I followed the same, and coded, it, in between the interviewer stopped me and said, I got you, lets move to next question.
3. I followed this approach, divided the input array into two halves, calls itself for the two halves, and then merge the two sorted halves. The merge() function is used for merging two halves. The merge(arr, l, m, r) is a key process that assumes that...read more
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Q3. 
Implement Stack with Linked List
Your task is to implement a Stack data structure using a Singly Linked List.
Explanation:
Create a class named Stack which supports the following operations, each in O(1...read more
Ans. 
1. Firstly, I made the structure of linked list.
2. Then, I made the four functions, of stack pop, push, empty and full.
3. And when I started to explain the written code, the interviewer was well convinced, and said no need, I understood, it and moved to theory questions of java.
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Round duration - 15 minutes
Round difficulty - Easy

The interview was scheduled at 4.30 pm again, and due to network issue, my audio was not clear to the interviewer, but the interviewer was highly cooperating, he called me over phone to take the interview, and video was on through the zoom meet only. 
The interview was like a discussion from both ends, which went very satisfying for me as a candidate and the interviewer too.
Before the interview in the morning, we were given the topics on which we had to write 100 words.

Round duration - 100 minutes
Round difficulty - Medium

It basically consisted of a 2hr test(approx) on AMCAT. The test consisted of 2 coding question and 20 questions of quantitative, reasoning and technical question based on DBMS, DS and small C coding.

Q1. 
Trapping Rainwater Problem Statement
You are given an array ARR of long type, which represents an elevation map where ARR[i] denotes the elevation of the ith bar. Calculate the total amount of rainwater t...read more
Ans. 
Step 1 : Find the highest bar on the left and right, array traversal is needed which reduces the efficiency of the solution.
Step 2 : To make this efficient one must pre-compute the highest bar on the left and right of every bar in linear time.
Step 3 : Then use these pre-computed values to find the amount of water in every array element.
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Round duration - 30 minutes
Round difficulty - Medium

The 2nd Round was technical interview round.
It started with the usual “Tell me something about yourself”. Then he asked questions based on resume, like I had mentioned that I am familiar with Concepts of Data Science and Machine, so he asked a few questions on them. Then he asked about OOPS concepts and he also asked few questions on my project.

Round duration - 45 minutes
Round difficulty - Easy

Round duration - 15 minutes
Round difficulty - Easy

The HR was pretty chill and she asked questions like:-
Tell Me something about yourself.
Do you plan to do Masters
All about my resume
About my club and project.