CIS - Cyber Infrastructure interview experience Real time questions & tips from candidates to crack your interview
Associate Software Engineer
CIS - Cyber Infrastructure
3 rounds | 7 Coding
problems
Selected Interview preparation journey
Journey
I am a B.Tech. graduate from Information Technology branch. Before my college I was engrossed into IIT-JEE prep due to which I had no knowledge of coding unlike others during my first-year. But in the summer vacations after my first year I kept practising on various coding platforms and built my concepts. The lockdown gave me enough time for preparation. Though I will honestly say that still I was not that much apt in coding unlike some of my peers during placements but my knowledge of core CS subjects and aptitude was strong which helped me a lot in cracking this job. I would suggest keep practising day by day initially you will find everything difficult but eventually you will get a fair idea of the kind of questions asked. Apart from coding have a good grasp of core CS subjects as standard questions are asked from them and practice aptitude questions and puzzles.
Application story
It was an on-campus opportunity for us. The company came for hiring for ASDE-1 post. The application process was standard. First we sent a Job Description along with all other details. Apart from filling the college form we were also required to make a profile and apply on Smartr portal also. In the portal we had to fill all the necessary details along with resume, GitHub and LinkedIn profile link. The eligible candidates had to give a online proctored coding test. The entire process was online.
Why selected/rejected for the role?
Though I was not prepared for system design questions but I tried to answer them with best possible solutions coming to my mind. I had a sound understanding of core CS subjects so I was able to answer most of the subjective questions. Coming to the coding part, I explained my approach properly to the interviewer while coding.
Preparation
Duration: 6 Months
Topics: OOPS, System Design, Operating System, DSA, Web Development
Tip 1 : Do at least 1 proper working project to showcase in interview
Tip 2 : Study basic concepts from core CS subjects as they are frequently asked
Tip 3 : Solve as many coding questions as you can for practice
Application process
Where: Campus
Eligibility: Above 6.5 CGPA(for girls), 7( for all)
Tip 1 : Have a good project in your resume and understand it thoroughly to answer the questions
Tip 2 : Put only those things in your resume on which you can handle questions
Interview rounds
01
Round
Medium
Online Coding Interview
Duration90 Minutes
Interview date12 Aug 2021
Coding problem1
There was an online coding test conducted on HakerRank platform in morning. It had two coding questions and the time limit was 90 minutes.
1. Alternate Print
Easy
10m average time
90% success
0/40
Asked in companies
You have two strings “A” and “B”. Your task is to print these two strings in an alternative fashion according to indices i.e. first character of “A”, the first character of “B”, the second character of “A”, the second character of “B” and so on.
Note:
If all characters of one string are printed and some characters of other string are remaining, then you have to print the remaining characters of the other string at the end of the resulting string.
Follow Up :
Can you solve the problem in O(N) time complexity and O(1) space complexity?
For Example:
A = “abc” B = “fdh” then answer will be afbdch.
02
Round
Medium
Video Call
Duration50 minutes
Interview date14 Aug 2021
Coding problem5
The interview was scheduled at morning on Microsoft Teams platform.
1. URL Shortener
Easy
10m average time
90% success
0/40
Asked in companies
You have given a URL id – 'N' consisting of only digits. Your task is to generate a short URL for the given URL id.
To generate a short URL, you need to convert the given URL id to 62 base number where digits of the number are:[“0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ”] i.e “0” corresponds to 0, “a” corresponds to 10, “Z” corresponds to 61, and “10” corresponds to 62, “11” corresponds to 63, and so on….
Follow Up:
Can you solve this in logarithmic time and space complexity?
2. OS Questions
There were some questions from Operating systems like deadlock, race condition and process threads. He asked me to explain Producer-consumer problem which is a popular synchronization problem of Operating System. I explained him then he gave me a link of an IDE in which I was required to code it in whichever language I am comfortable in.
Problem approach
Tip 1 : According to me, explaining your approach properly to the interviewer while coding is very important.
Tip 2 : Basic concepts of OS should be very clear
3. Technical Questions
The interviewer was asking some questions from things in my resume like my previous internships and project. I made a simple movie review portal and hosted the site on webhost. So the interviewer opened the link of the site and asked various questions regarding the project like-
- what are it’s features,
- what new functionally can I add
- questions regarding the tech stack
- the coding structure of the project.
-What all modules and objects I used in the code and how will I do the authentication.
Problem approach
Tip 1 : It’s better to add a quite decent project in your resume and be prepared for questions regarding it during the interview.
Tip 2 : A full stack working project will be better
4. OOPS Questions
Some concepts of OOPS like polymorphism and abstraction. As he was short of time I was required to give a short definition with a practical example.
Problem approach
Tip 1 : Prepare basic principles of OOPS with proper example
5. Technical Question
He asked me difference in time complexity and space complexity and nothing much was asked from DSA part
Problem approach
Tip 1 : Overall the interview had many questions from OS, web dev and system design and it’s advisable to be clear with fundamental topics of core CS subjects
03
Round
Easy
HR Round
Duration45 minutes
Interview date14 Aug 2021
Coding problem1
It was conducted virtually on Microsoft Teams platform at morning. After clearing the technical interview round I got the mail for HR round in around 15-20 minutes. The interviewer was very polite.
1. Basic HR Questions
This round started with questions like-
-Tell me about yourself
-My internship experience
-What are you passionate about
-What your friends do
-What are your ambitions and hobbies
-Tell me something you are proud of
-My overall experience in college
Problem approach
Tip 1 : It was more of a discussion about myself
Tip 2 : Descibe your internship details/experience properly
Tip 3 : Overall this round went very well and my suggestion is to stay confident and calm for this round.
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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