Red Hat Interview Questions, Process, and Tips

Hackerrank

Q1. Mostly related to the projects you've done in the past
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Assignment on Java, Bash

Q1. Question related to assignment
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Round duration - 90 minutes
Round difficulty - Medium

Q1. 
String Compression Problem Statement
Implement a program that performs basic string compression. When a character is consecutively repeated more than once, replace the consecutive duplicates with the coun...read more
Ans. 
Implement a program to compress a string by replacing consecutive duplicates with the count of repetitions.
• Iterate through the string and keep track of consecutive characters and their counts.

• Replace consecutive duplicates with the count of repetitions.

• Ensure the count of repetitions is ≤ 9.

• Return the compressed string.
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Round duration - 90 minutes
Round difficulty - Easy

This was my first technical round. he asked me about all my projects and the technologies used. some questions were on c and c++. what is heap , stack, memory allocation methods. Basically they covered all the concepts of c from string to pointers. Then they gave me one coding question which was on arrays. Best part was interviewers were very friendly.

Q1. 
Jumping Numbers Problem Statement
Given a positive integer N, your task is to find and display all jumping numbers that are less than or equal to N.
A number is termed a jumping number if every adjacent ...read more
Ans. 
Find all jumping numbers less than or equal to a given positive integer N.
• Iterate through numbers from 0 to N and check if each number is a jumping number.

• For each number, check if the absolute difference between adjacent digits is 1.

• Include single-digit numbers as jumping numbers by default.

• Output the jumping numbers that satisfy the conditions.
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Round duration - 75 minutes
Round difficulty - Hard

This round was completely on data structures . he asked me all the questions related to linked list like detect a loop, remove a loop and graphs like BFS and DFS algorithms and some on trees. even on Adjacency matrix and adjacency list.

Round duration - 60 minutes
Round difficulty - Medium

Q1. First round will be either with Recruiter to check your CV and match it to profile or Directly with Manager after that to see you are fit culturally, technically. It wont be much technical just about your ...read more
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Q2. Second will be with manager if first was with Recruiter/HR, where he will be asking you about your experience and exposure to RH and he will check if you are fit culturally as well as professionally to his...read more
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Q3. If all fine, third would be Manager/HR drawing your offer letter without asking your expectation, you can do bargaining here though.
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Q4. 1. How you would troubleshoot a process hanging? 2. How would you troubleshoot slow system performance? 3. Network latency issue? 4.Cluster failover issue? 4. Application unable to start issue? 5. Last tim...read more
Ans. 
Troubleshooting various technical issues in a support role
• For a process hanging, check the system logs and identify the process causing the issue. Use tools like strace or lsof to identify the root cause.

• For slow system performance, check CPU, memory, and disk usage. Use tools like top, iostat, and vmstat to identify the bottleneck.

• For network latency issues, use tools like ping, traceroute, and tcpdump to identify the...read more
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