Citrus Informatics QA Engineer Interview Questions and Answers

Q1. What is the main responsibility of a QA Engineer?
Ans. 
The main responsibility of a QA Engineer is to ensure the quality of software products by testing and identifying defects.
• Creating test plans and test cases

• Executing test cases and reporting defects

• Collaborating with developers to resolve issues

• Automating test cases using tools like Selenium

• Performing regression testing to ensure software stability
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Q2. Ensure software quality through testing.
Ans. 
Ensuring software quality through testing involves thorough testing of all functionalities to identify and fix any bugs or issues.
• Create test cases to cover all functionalities of the software

• Perform manual and automated testing to identify bugs

• Regression testing to ensure new changes do not impact existing functionalities

• Use tools like Selenium, JUnit, or TestNG for automated testing

• Collaborate with developers to fix
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Q1. What is JMeter?
Ans. 
JMeter is an open-source tool used for performance testing and load testing of web applications.
• JMeter allows testers to simulate heavy loads on servers, networks, or objects to test their strength and analyze overall performance.

• It can be used to measure performance under different load types, such as stress testing, spike testing, and endurance testing.

• JMeter supports various protocols like HTTP, HTTPS, FTP, JDBC, LD...read more
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Q1. What is Cucumber and Karate?
Ans. 
Cucumber and Karate are testing frameworks used for behavior-driven development (BDD) and API testing, respectively.
• Cucumber is a BDD tool that allows writing test cases in plain English using Gherkin syntax

• Karate is an API testing tool that combines API testing, test doubles, performance testing, and UI automation in one framework

• Both tools support automation testing and help in collaboration between technical and non
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Q1. Write scenarios on banking application
Ans. 
Scenarios on banking application for QA testing
• 1. User login with valid credentials

• 2. User login with invalid credentials

• 3. Transfer funds between accounts

• 4. Check account balance

• 5. Update personal information
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Q2. Write sql queries
Ans. 
SQL queries for QA Engineer interview
• Use SELECT statement to retrieve data from database

• Use WHERE clause to filter data based on specific conditions

• Use JOIN clause to combine data from multiple tables

• Use GROUP BY clause to group data based on specific columns

• Use ORDER BY clause to sort data in ascending or descending order
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Q1. Basic questions
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Round duration - 60 minutes
Round difficulty - Easy

Technical interview round with questions on DSA and DBMS mainly.

Q1. 
Maximum Sum Subarray Problem Statement
Given an array ARR consisting of N integers, determine the sum of the subarray with the maximum sum, including the possibility of an empty subarray.
A subarray is a...read more
Ans. 
Find the sum of the subarray with the maximum sum in a given array.
• Iterate through the array and keep track of the current sum and maximum sum.

• Update the maximum sum if the current sum becomes greater.

• Handle cases where the array has all negative numbers or empty subarray.

• Example: For input [-2, 1, -3, 4, -1], the maximum sum subarray is [4] with sum 4.
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Q2. 
Prime Numbers Identification
Given a positive integer N, your task is to identify all prime numbers less than or equal to N.
Explanation:
A prime number is a natural number greater than 1 that has no po...read more
Ans. 
Identify all prime numbers less than or equal to a given positive integer N.
• Iterate from 2 to N and check if each number is prime

• Use the Sieve of Eratosthenes algorithm for efficient prime number identification

• Optimize by only checking numbers up to square root of N for divisibility
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Q3. What are Joins in the context of databases?
Ans. 
Joins in databases are used to combine rows from two or more tables based on a related column between them.
• Joins are used to retrieve data from multiple tables based on a related column.

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• INNER JOIN returns rows when there is at least one match in both tables.

• LEFT JOIN returns all rows from the left table and the matched rows from the right ta...read more
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Round duration - 30 minutes
Round difficulty - Easy

Typical HR round with behavioral problems.