Tata Communications interview experience Real time questions & tips from candidates to crack your interview
System Engineer
Tata Communications
3 rounds | 3 Coding
problems
Selected Interview preparation journey
Preparation
Duration: 4 months
Topics: HARDWORK , DETERMINATION, PRACTICE, LEARN, FOCUS
Tip 1 : Concentrate on what you want to achieve
Tip 2 : Do not give up
Application process
Where: Campus
Eligibility: 6 CGPA
Tip 1 : Have some technical projects on resume
Tip 2 : Do not put false things on resume
Interview rounds
01
Round
Medium
Online Coding Interview
Duration40 Minutes
Interview date11 Nov 2021
Coding problem1
1. Count Number of Subsequences
Moderate
15m average time
85% success
0/80
Asked in companies
Given an array of non-negative integers ‘A’ and an integer ‘P’, find the total number of subsequences of ‘A’ such that the product of any subsequence should not be more than ‘P’.
A subsequence is a sequence that can be derived from another sequence by deleting some or no elements without changing the order of the remaining elements.
Note
You need to print your answer modulo 10^9 + 7.
For Example
Let us take A = [1,2,3] and P = 4.
All the subsequences not having product more than ‘4’ are {1}, {2}, {3}, {1,2}, {1,3}. Therefore count is equal to ‘5’.
Problem approach
Step 1 : I first applied bubble sort. It was not good enough.
Step 2 : Interviewer asked me to optimise the solution.
Step 3 : Then i gave solution with merge sort and interviewer was happy.
02
Round
Medium
Video Call
Duration15 minutes
Interview date11 Nov 2021
Coding problem1
1. OS Questions
What are semaphores?
What is virtual memory?
Problem approach
Tip 1 : Read Galvin for OS thoroughly.
Tip 2 : Do practice for SQL queries
03
Round
Medium
HR Round
Duration10 minutes
Interview date12 Nov 2021
Coding problem1
1. Basic HR Questions
LOCATION PREFERENCE
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Skill covered: Programming
What is recursion?
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