Red Hat Software Quality Engineer Interview Questions and Answers

Basic 10th standard level aptitude problem

Basic very easy level questions

Q1. Thorough with the basic knowledge of CS fundamentals
Add your answer
Q2. 1. coding question - count the frequency of all chars in a word. 2. ACID properties. 3. swap 2 numbers without using any extra variable.
Ans. 
Count frequency of characters in a word, explain ACID properties, swap 2 numbers without extra variable.
• To count frequency of characters in a word, create a hashmap to store character counts.

• ACID properties in database: Atomicity, Consistency, Isolation, Durability.

• To swap 2 numbers without extra variable, use XOR operation: a = a ^ b, b = a ^ b, a = a ^ b.

• Example: word = 'hello', frequency = {'h': 1, 'e': 1, 'l': 2, '
Answered by AI
Add your answer
Q3. What will be your first step if client reports any issue
Ans. 
My first step would be to gather more information about the issue from the client.
• Ask the client to provide specific details about the issue such as when it occurred, what actions were taken before the issue occurred, and any error messages received.

• Try to replicate the issue on a test environment to understand the root cause.

• Communicate with the client to keep them updated on the progress and potential solutions.

• Prior...read more
Answered by AI
Add your answer
Q4. Try to reproduce the issue
Add your answer

Q1. Resume, past experience based questions
Add your answer
Q2. Past projects accomplishments
Add your answer

Q1. Scenario based questions
Add your answer

Q1. Technology based questions
Add your answer

Q1. Feedback of all previous rounds
Add your answer

Q1. Tell me about your family
Add your answer
Q2. You are immediately join are noy
Add your answer

Q1. Tell me about yourself.
Add your answer

Q1. What are your salary expectations
Add your answer
Q2. What about your father
Add your answer
Q3. Why should we hire you
Add your answer

Q1. Why are you looking for a change?
Add your answer

Round duration - 60 Minutes
Round difficulty - Medium

three coding questions , no mcq, 1 hr limit

Q1. 
Reverse Linked List Problem Statement
Given a singly linked list of integers, return the head of the reversed linked list.
Example:
Initial linked list: 1 -> 2 -> 3 -> 4 -> NULL
Reversed link...read more
Ans. 
Reverse a singly linked list of integers and return the head of the reversed linked list.
• Iterate through the linked list and reverse the pointers to point to the previous node instead of the next node.

• Use three pointers to keep track of the current, previous, and next nodes while reversing the linked list.

• Update the head of the reversed linked list as the last node encountered during the reversal process.
Answered by AI
Add your answer
Q2. 
Triplets with Given Sum Problem
Given an array or list ARR consisting of N integers, your task is to identify all distinct triplets within the array that sum up to a specified number K.
Explanation:
A t...read more
Ans. 
The task is to identify all distinct triplets within an array that sum up to a specified number.
• Iterate through the array and use nested loops to find all possible triplets.

• Check if the sum of the triplet equals the specified number.

• Print the valid triplets or return -1 if no triplet exists.
Answered by AI
Add your answer
Q3. 
Intersection of Linked List Problem
You are provided with two singly linked lists containing integers, where both lists converge at some node belonging to a third linked list.
Your task is to determine t...read more
Ans. 
Find the node where two linked lists merge, return -1 if no merging occurs.
• Traverse both lists to find their lengths and the difference in lengths

• Move the pointer of the longer list by the difference in lengths

• Traverse both lists simultaneously until they meet at the merging node
Answered by AI
Add your answer

Round duration - 45 Minutes
Round difficulty - Medium

1st they asked area of interest like frontend or backend. I said backend 
Then thy asked a array based question followed by a linked list. 
Then he asked some computer fundametals.

Q1. 
Find Duplicates in an Array
Given an array ARR of size 'N', where each integer is in the range from 0 to N - 1, identify all elements that appear more than once.
Return the duplicate elements in any orde...read more
Ans. 
Find duplicates in an array of integers within a specified range.
• Iterate through the array and keep track of the count of each element using a hashmap.

• Identify elements with count greater than 1 as duplicates.

• Return the duplicate elements as the output.

• Handle edge cases like empty array or no duplicates found.
Answered by AI
Add your answer
Q2. 
Remove Nodes with Specific Value from Linked List
You are provided with a singly linked list consisting of integer values and an integer 'K'. Your task is to eliminate all nodes from the linked list that ...read more
Ans. 
Remove nodes with specific value from a singly linked list.
• Traverse the linked list and remove nodes with value equal to 'K'.

• Update the references of the previous node to skip the removed node.

• Handle edge cases like removing the head node or multiple nodes with the same value.

• Return the modified linked list after removal.
Answered by AI
Add your answer

Round duration - 60 Minutes
Round difficulty - Medium

mainly focused on dsa , dbms and working of an API

Q1. 
Sort Linked List Based on Actual Values
Given a Singly Linked List of integers that are sorted based on their absolute values, the task is to sort the linked list based on the actual values.
The absolute...read more
Ans. 
Sort a Singly Linked List based on actual values instead of absolute values.
• Traverse the linked list and store the values in an array.

• Sort the array based on actual values.

• Update the linked list with the sorted values.
Answered by AI
Add your answer

Q1. Explain your previous projects
Add your answer

Q1. How did you integrate MongoDB with Python in your earlier project
Ans. 
I used PyMongo library to connect to MongoDB and perform CRUD operations in Python
• Installed PyMongo library using pip

• Created a MongoClient object to connect to the MongoDB server

• Accessed the database and collection using the MongoClient object

• Performed CRUD operations using the collection object

• Used pymongo.cursor.Cursor to iterate over the query results
Answered by AI
Add your answer

English ang logical and aptitude test online

Q1. Round-1 tech after clearing aptitude test
Add your answer

Q1. Round-2 technical after clearing Round-1 technical
Add your answer

About Java

First round was mix of aptitude, cs fundamentals, quant, programming and flow chart based mcq.
Note-
1- There was timer for each sections and subsections.
2- Once you move ahead of a ques then u cant go back on previous ques.

Data Structure & Algorithm based ques.
Toughness- Leetcode medium.
Few ques on dbms in the end.
Note- Complete code from scratch to be written.

Data Structure &Algorithm based ques.
Toughness- Leetcode medium.
In the end, project was discussed briefly.
Note- Complete code from scratch.

Coding + HR combined.
Many coding ques were ask and then ques were manipulated to come up with new logic.
Here, only pseudo code based discussion.
In the end, entire resume was discussed from college, project, future goals and hr based ques.