CIS - Cyber Infrastructure interview experience Real time questions & tips from candidates to crack your interview
SDE - 1
CIS - Cyber Infrastructure
4 rounds | 11 Coding
problems
Selected Interview preparation journey
Preparation
Duration: 2 months
Topics: Fundamentals of C, Javascript, DBMS, OOPS, Python
Tip 1 : Explore and attend every coding challenges.
Tip 2 : Learn from someone's code.
Tip 3 : Always do hands-on coding related things.
Application process
Where: Linkedin
Eligibility: Above 6.5
Tip 1 : Keep Resume short and clean. No need to explain all things you have attended or achieved.
Tip 2 : Just keep the technical knowledge you are completely confident.
Interview rounds
01
Round
Medium
Online Coding Interview
Duration90 mins
Interview date25 Feb 2021
Coding problem1
Timing was afternoon.
There were no technical issues. Environment was good.
Interviewer was friendly.
1. OS Questions
What is semaphores?
What is virtual memory?
Problem approach
Tip 1: thoroughly learn about OS
Tip 2: require the functional knowledge about operating system
02
Round
Medium
Online Coding Interview
Duration90 mins
Interview date25 Feb 2021
Coding problem4
1. Debugging question
In coding part sometime the questions use case will be clumsy, but read those use cases carefully sometime to crack the Coding challenge, will requires only 2-3 lines of code.Choose the platform you are completely confident with.
Problem approach
Step 1: from the use case, got the condition to be executed.
Step 2 : I have used python to crack the challenge with if else condition.
Step 3 : In optimised manner was able to complete the coding challenge quickly
2. Puzzle
Identify the cube face
Problem approach
Tip 1: lots of cube related tutorials available in YouTube. Refer those.
Tip 2: thorough with cube equations
3. OS Questions
System Partition, Round Robin
Problem approach
Tip 1: Know about evaluating the OS related problems
Tip 2: Go through the section thoroughly.
4. DBMS Questions
DML operations
Problem approach
Tip 1: Have idea about DBMS both theory and technical things.
Tip 2: Aware about every query operations.
03
Round
Medium
Online Coding Interview
Duration90 mins
Interview date25 Feb 2021
Coding problem1
1. Two Sum
Easy
10m average time
90% success
0/40
Asked in companies
You are given an array of integers 'ARR' of length 'N' and an integer Target. Your task is to return all pairs of elements such that they add up to Target.
Note:
We cannot use the element at a given index twice.
Follow Up:
Try to do this problem in O(N) time complexity.
04
Round
Medium
Online Coding Interview
Duration90 mins
Interview date25 Feb 2021
Coding problem5
Afternoon,
No technical issues,
Interviewer was friendly
1. Design question
Remember the rabbit and turtle race? Please write a program in python simulate two players (Rabbit and Turtle) roll a dice (1-6) iteratively and run until Hints: use random number generator, loops, and if/else statement Design a program to play this game
Problem approach
Step 1 : Applied if else condition inside for loop iteration.
Step 2 : Optimised the code.
2. Puzzle
Cube face Identification
Problem approach
Tip 1: Identify the opposite faces by the given hints.
Tip 2: reassemble the cube
3. COA Question
Computer Architecture
Problem approach
Tip 1: Read the functional parts thoroughly
Tip 2: Have idea about Computer Architecture
4. OS Questions
Scheduling of resources and jobs
Security
Problem approach
Tip 1: Read the OS topics thoroughly.
Tip 2: Have the idea to evaluate the OS related problems.
5. DBMS Questions
Importance of Keys
SQL commands
Problem approach
Tip 1: Go through the theoretical parts in DBMS
Tip 2: Must be aware of DML and other SQL operations
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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