Moolya Software Testing Sdet Interview Questions and Answers

Round duration - 30 minutes
Round difficulty - Medium

This was a MCQ round. 30 ques in 30 mins consisting of difficult quantitative aptitude questions were to be solved.

Round duration - 60 minutes
Round difficulty - Medium

In this test round, 2 coding questions were given. Either write the code or pseudo code

Q1. 
N Queens Problem
Given an integer N, find all possible placements of N queens on an N x N chessboard such that no two queens threaten each other.
Explanation:
A queen can attack another queen if they ar...read more
Ans. 
The N Queens Problem involves finding all possible placements of N queens on an N x N chessboard without threatening each other.
• Use backtracking algorithm to explore all possible configurations.

• Keep track of rows, columns, and diagonals to ensure queens do not threaten each other.

• Generate all valid configurations and print them out.
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Q2. 
Sort 0 1 2 Problem Statement
Given an integer array arr of size 'N' containing only 0s, 1s, and 2s, write an algorithm to sort the array.
Input:
The first line contains an integer 'T' representing the n...read more
Ans. 
Sort an array of 0s, 1s, and 2s in linear time complexity.
• Use three pointers to keep track of 0s, 1s, and 2s while traversing the array.

• Swap elements based on the values encountered to sort the array in-place.

• Time complexity should be O(N) and space complexity should be O(1).
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Round duration - 60 minutes
Round difficulty - Easy

This was a technical round with questions on DSA.

Q1. 
Reverse Words in a String: Problem Statement
You are given a string of length N. Your task is to reverse the string word by word. The input may contain multiple spaces between words and may have leading o...read more
Ans. 
Reverse words in a string while handling leading, trailing, and multiple spaces.
• Split the input string by spaces to get individual words

• Reverse the order of the words

• Join the reversed words with a single space in between
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Q2. 
Circular Linked List Detection
You are provided with the head of a linked list containing integers. Your task is to determine if the linked list is circular.
Note:
• A linked list is considered circula...read more
Ans. 
Detect if a given linked list is circular by checking if it forms a closed loop.
• Traverse the linked list using two pointers, one moving at double the speed of the other.

• If the two pointers meet at any point, the linked list is circular.

• If the faster pointer reaches the end of the list (NULL), the linked list is not circular.
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Round duration - 30 minutes
Round difficulty - Easy

HR round with typical behavioral problems.

Q1. Tell Me something about yourself.
Ans. 
I am a highly experienced consultant with a strong background in problem-solving and strategic planning.
• Over 10 years of experience in consulting for various industries

• Expertise in analyzing complex business problems and providing effective solutions

• Proven track record of successfully leading teams and managing projects

• Strong communication and presentation skills

• Ability to build and maintain strong client relationships

• ...read more
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Q2. Why do you want to join this company?
Ans. 
I want to join this company because of its strong reputation, diverse client base, and opportunities for professional growth.
• Strong reputation: The company has a proven track record of success and is highly regarded in the industry.

• Diverse client base: Working with a wide range of clients will provide me with valuable experience and the opportunity to learn from different industries and challenges.

• Professional growth: ...read more
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Q1. What are the important HTTP methods in postman ?
Ans. 
Important HTTP methods in Postman include GET, POST, PUT, PATCH, and DELETE.
• GET: Used to retrieve data from a server. Example: GET request to fetch user details.

• POST: Used to submit data to a server. Example: POST request to create a new user.

• PUT: Used to update data on a server. Example: PUT request to update existing user details.

• PATCH: Used to partially update data on a server. Example: PATCH request to update user'...read more
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Q2. Explain the difference between functional and non-functional testing
Ans. 
Functional testing focuses on testing the functionality of the software, while non-functional testing focuses on testing the performance, usability, and other non-functional aspects.
• Functional testing ensures that the software functions as expected based on the requirements.

• Non-functional testing evaluates aspects such as performance, usability, reliability, and scalability.

• Examples of functional testing include unit t...read more
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Q1. What is the assertions in postman and its importance
Ans. 
Assertions in Postman are validation points to ensure the expected response from an API
• Assertions in Postman are used to validate the response of an API request

• They help ensure that the response meets the expected criteria

• Common types of assertions include status code, response body content, response time, etc.

• Examples of assertions in Postman: checking if status code is 200, verifying specific data in response body
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Q2. What are the seven principles of testing
Ans. 
The seven principles of testing are guidelines that help testers in their testing activities.
• Testing shows the presence of defects, not their absence.

• Exhaustive testing is impossible.

• Early testing saves time and money.

• Defect clustering occurs.

• Pesticide paradox - if the same tests are repeated over and over, eventually the same set of test cases will no longer find any new bugs.

• Testing is context dependent.

• Absence-of-er...read more
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Q1. Common HR discussion
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Prime number and reverse a string

2 sum program from Geeks for Geeks

Q1. Ruby basics Eigen class Callbacks
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Q2. Lazy and Eagar loading N+1 problem
Ans. 
Lazy loading delays loading of related data until it is specifically requested, while eager loading loads all related data upfront. N+1 problem occurs when lazy loading results in multiple additional queries being made.
• Lazy loading is used to improve performance by only loading related data when needed

• Eager loading loads all related data upfront to reduce the number of queries made

• N+1 problem occurs in lazy loading whe...read more
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Q3. Puzzles
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Q1. AWS basics with CI/CD
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Q2. Deployment to AWS
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Q1. Basic introduction and salary discussion
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