CIS - Cyber Infrastructure interview experience Real time questions & tips from candidates to crack your interview
Associate Software Engineer
CIS - Cyber Infrastructure
2 rounds | 4 Coding
problems
Selected Interview preparation journey
Journey
In our college, there were not so many opportunities available so the only choice I was left with was to either work hard for placements or prepare for M.tech.But i was inclined towards getting a placement as I was good in DSA. Did a lot of practice on various online sites and was able to perform well in my off-campus as well as on-campus interviews
Application story
I saw an opening posted on an telegram group, applied straight to the career portal and got the test link. Cleared the test and was moved to the interview round.
Why selected/rejected for the role?
Selected. All the rounds went well. Pretty standard interviews. Just prepare well for DSA and Puzzles then it will be a cakewalk.
Preparation
Duration: 12 months
Topics: Data Structures, Algorithms, Database, System Design, Operating Systems
Tip 1 : Practice Data Structure questions as much as you can. Also, be confident during the interview about your solution. For practice, you can prefer Coding Ninjas and Geeks For Geeks.
Tip 2 : Read About Previously asked questions by the company
Application process
Where: Company Website
Eligibility: Above 7 CGPA
Tip 1 : Keep it short. Mention the academic and professional projects you've done. Add your educational details properly with the percentage or CGPA obtained.
Tip 2 : Only write those things in the resume which you are confident of and keep practicing.
Interview rounds
01
Round
Easy
Video Call
Duration75 minutes
Interview date1 Mar 2022
Coding problem3
After the online test was cleared, we started getting interview invites. In this round 2 DSA questions , some questions on computer subjects, projects and past work were asked.
1. Longest Valid Parentheses
Moderate
10m average time
90% success
0/80
Asked in companies
You are given a string ‘S’ containing only the characters ‘)’ and ‘(‘. You need to find the length of the longest valid i.e. well-formed parentheses substring.
For example:
Let the given string be “(()())((”.
Here the valid parentheses substrings are: “()”, “()” and “(()())”. Out of these the longest valid string is “(()())” which has a length 6.
Problem approach
Scan the string from beginning to end.
If current character is '(',
push its index to the stack. If current character is ')' and the
character at the index of the top of stack is '(', we just find a
matching pair so pop from the stack. Otherwise, we push the index of
')' to the stack.
After the scan is done, the stack will only
contain the indices of characters which cannot be matched. Then
let's use the opposite side - substring between adjacent indices
should be valid parentheses.
If the stack is empty, the whole input
string is valid. Otherwise, we can scan the stack to get longest
valid substring as described in step 3.
2. Letter Combinations of a Phone Number
Moderate
35m average time
65% success
0/80
Asked in companies
Given a string S containing digits from 2 to 9 inclusive. Your task is to find all possible letter combinations that the number could represent.
A mapping from Digits to Letters (just like in Nokia 1100) is shown below. Note that 1 does not map to any letter.
Problem approach
Used backtracking to generate all possible combinations.
3. OS Questions
Explain Scheduling algorithms?
What is virtual memory?
What is Process Management and Device Management?
What are semaphores?
Problem approach
Tip 1 : Learn basic OS questions
Tip 2 : Go through all the previously asked Questions
02
Round
Easy
HR Round
Duration15 minutes
Interview date4 Mar 2022
Coding problem1
In HR interview, he asked me what do I do apart from programming, about my past three years, what are my future plans, Strengths, Struggles.
1. Basic HR Questions
What do you do apart from programming?
Tell me about your past three years.
What are my future plans and strengths?
What do you know about Publicis Sapient?
Problem approach
Tip 1 : Practice HR questions
Tip 2 : Be confident.
Tip 3 : Ask all your doubts about the company and compensation.
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
How do you remove whitespace from the start of a string?
Choose another skill to practice
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