30+ Tester Interview Questions and Answers

Answers to common software testing interview questions.

• SDLC (Software Development Life Cycle) is a process followed by software development teams to design, develop, and test high-quality software.

• STLC (Software Testing Life Cycle) is a process followed by software testing teams to ensure that the software meets the requirements and is free of defects.

• RTM (Requirement Traceability Matrix) is a document that maps and traces user requirements with test cases to ensure that all ...read more

The question is about a tester interview and includes various topics such as output manipulation, finding largest and smallest elements, OOPs concepts in Python, difference between find_element and find_elements, negative indexing in Python, and list comprehension.

• 1. The desired output is 'TTHHEE'.

• 2. Find the largest and smallest elements from a given list.

• 3. Discuss the OOPs concepts used in Python.

• 4. Explain the difference between find_element and find_elements.

• 5. Explain h...read more

Testing is the process of evaluating a system or its component(s) with the intent to find whether it satisfies the specified requirements or not.

• Testing is a process of identifying defects or errors in software applications.

• Waterfall model is a linear sequential approach where testing is done at the end of the development cycle.

• Agile method is an iterative approach where testing is done throughout the development cycle.

• Test case is a set of conditions or variables under which...read more

Test scenario is a high-level description of the functionality to be tested, while test case is a detailed step-by-step procedure to test a specific scenario.

• Test scenario is a broad description of what needs to be tested

• Test case is a specific set of steps to test a particular scenario

• Test scenario can have multiple test cases

• Test case includes preconditions, inputs, expected outputs, and post-conditions

• Test case should be repeatable and independent

ADAS system in Powertrain helps optimize engine performance for fuel efficiency and emissions control.

• ADAS in Powertrain can adjust engine timing and fuel injection to improve efficiency

• It can also monitor exhaust emissions and adjust systems to reduce pollution

• Example: ADAS in Powertrain can detect when a vehicle is idling unnecessarily and shut off the engine to save fuel

The bug life cycle refers to the stages a bug goes through from discovery to resolution.

• Bug is reported

• Bug is assigned to a tester

• Tester reproduces the bug

• Bug is logged in a bug tracking system

• Bug is prioritized and assigned to a developer

• Developer fixes the bug

• Tester verifies the fix

• Bug is closed

Python is a high-level programming language known for its simplicity and readability. ADAS stands for Advanced Driver Assistance Systems, which are technologies designed to assist drivers in the driving process.

• Python is a versatile programming language used for web development, data analysis, artificial intelligence, and more.

• ADAS systems include features like adaptive cruise control, lane departure warning, and automatic emergency braking.

• Python is commonly used in developi...read more

Java is a programming language known for its object-oriented programming (OOP) features.

• Java is a high-level, class-based, object-oriented language.

• It supports encapsulation, inheritance, and polymorphism.

• Objects are created from classes, allowing for modular and reusable code.

• Java uses OOP principles to organize and structure code efficiently.

Test cases for project

• Verify login functionality with valid credentials

• Verify login functionality with invalid credentials

• Verify user can create a new account

• Verify user cannot create an account with existing email

• Verify user can add items to cart

• Verify user can remove items from cart

• Verify user can checkout with valid payment information

• Verify user cannot checkout with invalid payment information

• Verify user can view order history

• Verify user can update account information

Black box testing is a software testing technique where the internal structure, design, and implementation of the system are not known to the tester.

• Black box testing focuses on the functionality of the system.

• Test cases are designed based on the system's requirements and specifications.

• The tester does not have access to the source code or the internal workings of the system.

• It verifies if the system behaves as expected from the end-user's perspective.

• Examples include input v...read more

Alpha testing is done by internal teams before the software is released to external users, while beta testing is done by external users before the software is officially released.

• Alpha testing is done by internal teams within the organization, while beta testing is done by external users outside the organization.

• Alpha testing is conducted in a controlled environment, while beta testing is conducted in a real-world environment.

• Alpha testing focuses on finding bugs and issues w...read more

Test cases can be prioritized based on risk, importance, complexity, and frequency of use.

• Identify critical functionalities and prioritize test cases accordingly

• Consider the impact of failure on end-users and prioritize tests that cover those scenarios

• Prioritize tests that cover high-risk areas of the application

• Prioritize tests that cover frequently used features

• Prioritize tests that cover complex functionalities

• Use risk-based testing to prioritize tests based on the likelih...read more

Approximately 70% of our testing process is automated.

• We have automated regression tests for critical functionalities

• Automation scripts are used for load testing and performance testing

• Continuous integration pipelines include automated tests

• Approximately 70% of test cases are automated

Regression testing is the process of retesting a software application to ensure that new code changes have not adversely affected existing functionality.

• Regression testing is performed after code changes to verify that existing features still work correctly.

• It helps in identifying any defects introduced by new code changes.

• Automated testing tools are often used for regression testing to save time and effort.

• Examples of regression testing include running test cases that cover ...read more

Yes, I have experience with automation testing using tools like Selenium and Appium.

• Experience with automation testing tools like Selenium and Appium

• Ability to write test scripts in languages like Java, Python, or JavaScript

• Knowledge of test automation frameworks like TestNG or JUnit

I am familiar with various testing frameworks to efficiently organize and execute test cases.

• I have experience with popular testing frameworks such as Selenium, JUnit, TestNG, and Cucumber.

• Frameworks help in structuring test cases, providing reusable components, and generating detailed reports.

• Familiarity with frameworks allows for easier maintenance and scalability of test suites.

C# is a programming language developed by Microsoft for building applications on the .NET framework.

• C# is widely used for developing Windows applications, web applications, and games.

• It is an object-oriented language with features like type safety, garbage collection, and scalability.

• C# allows for easy integration with other languages and libraries, making it versatile for various development needs.

OOP (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data and code to manipulate that data. Design refers to the process of creating a plan or blueprint for a system or application.

• OOP focuses on creating objects that interact with each other to accomplish tasks

• Design involves creating a structure or layout for a system or application

• In OOP, classes define the blueprint for objects, while design patterns provide soluti...read more

Java program to find all links in a given text

• Use regular expressions to match URLs in the text

• Iterate through the text and extract all URLs

• Store the URLs in an array of strings

Java program to reverse a String

• Create a char array from the input String

• Use two pointers to swap characters from start and end of the array

• Convert the char array back to a String and return

Scrum is an agile framework for managing work on complex projects.

• Scrum involves breaking down work into small, manageable tasks called user stories.

• It emphasizes frequent communication and collaboration among team members.

• Scrum uses time-boxed iterations called sprints to deliver incremental value.

• Roles in Scrum include Product Owner, Scrum Master, and Development Team.

• Popular tools for Scrum include Jira, Trello, and Asana.

I use Selenium for automated testing of web applications.

• Creating test scripts using Selenium WebDriver

• Executing test scripts on different browsers

• Verifying expected outcomes against actual results

• Generating test reports

Automation testing is the use of software to execute test cases and compare actual outcomes with expected outcomes.

• Automation testing saves time and effort by automating repetitive tasks.

• It increases test coverage and accuracy.

• Tools like Selenium, Appium, and JUnit are commonly used for automation testing.

API testing is a type of software testing that involves testing APIs directly.

• API testing involves testing the functionality, reliability, performance, and security of APIs.

• It focuses on verifying that the API meets the requirements and works as expected.

• API testing can be done manually or using automated tools like Postman or SoapUI.

• Examples of API testing include testing RESTful APIs, SOAP APIs, and web services.

Static testing is a type of software testing where the code is not executed. Blackbox testing is a type of testing where the internal logic of the system is not known to the tester.

• Static testing involves reviewing the code, requirements, and design documents to find defects early in the development process.

• Blackbox testing focuses on testing the functionality of the software without knowing the internal code structure.

• Examples of static testing include code reviews, walkthro...read more

A framework is a set of guidelines, libraries, and tools used to develop and test software applications.

• Frameworks provide a structure for organizing code and implementing common functionalities.

• Examples include Selenium for automated testing, JUnit for unit testing, and TestNG for test management.

• Frameworks help improve efficiency, maintainability, and scalability of testing processes.

A program to reverse a number input by the user.

• Take input from user

• Convert the number to a string

• Reverse the string

• Convert the reversed string back to a number

• Output the reversed number

Attributes of test cases include clarity, completeness, correctness, efficiency, and effectiveness.

• Clarity: Test cases should be easy to understand and follow.

• Completeness: Test cases should cover all possible scenarios and conditions.

• Correctness: Test cases should accurately reflect the expected results.

• Efficiency: Test cases should be designed to be executed in a timely manner.

• Effectiveness: Test cases should be able to identify defects in the system.

• Example: A test case fo...read more

Selenium is a popular open-source automation testing tool used for web applications.

• Selenium is used for automating web browsers.

• It supports multiple programming languages like Java, Python, C#, etc.

• Selenium WebDriver is the most popular component used for writing test scripts.

• Selenium Grid is used for parallel testing across different browsers and environments.

Testing is the process of evaluating a system or application to identify defects or errors.

• Testing involves executing a system or application to find bugs or issues.

• It ensures that the software meets the specified requirements and works as expected.

• Types of testing include functional testing, performance testing, and security testing.

• Examples of testing tools include Selenium, JUnit, and LoadRunner.

Software testing life cycle is a process of testing software from planning to deployment.

• STLC includes planning, designing, executing, and reporting.

• It ensures that the software meets the requirements and is of high quality.

• STLC involves functional, non-functional, and regression testing.

• It also includes test environment setup and test data creation.

• STLC ends with the release of the software.

• Example: STLC phases - requirement analysis, test planning, test case design, test ex...read more

Implement a stack data structure without using any inbuilt functions or libraries.

• Create a class or struct to represent the stack

• Use an array to store the elements of the stack

• Implement push, pop, and peek operations

• Handle stack underflow and overflow conditions

• Example: class MyStack { int[] arr; int top; void push(int x) { // implementation } }

Selenium has limitations such as browser support, handling dynamic elements, and lack of built-in reporting.

• Limited browser support compared to other automation tools

• Difficulty in handling dynamic elements on web pages

• Lack of built-in reporting capabilities, requiring integration with other tools

• Slower execution speed compared to other automation tools

• Challenges in testing mobile applications