900+ Test Engineer Interview Questions and Answers

== checks reference equality; .equals() checks value equality, can be overridden for custom comparison.

• == compares memory addresses, while .equals() compares the actual content of objects.

• Example: new String('hello') == new String('hello') returns false, but 'hello'.equals('hello') returns true.

• For wrapper classes like Integer, small values (-128 to 127) are cached, affecting == behavior.

• Override equals() when logical equality is needed, especially in collections or compariso...read more

final, finally, and finalize serve different purposes in Java: constants, cleanup, and garbage collection respectively.

• final: Used to declare constants. Example: final int MAX_VALUE = 100;

• finally: A block that executes after try-catch. Example: try { /* code */ } catch (Exception e) { /* handle */ } finally { /* cleanup */ }

• finalize(): A method called by the garbage collector. Example: protected void finalize() { /* cleanup code */ }

• final variable cannot be reassigned after i...read more

The Java Memory Model defines thread interactions with memory, ensuring visibility and ordering in multithreaded environments.

• JMM specifies how threads read and write shared variables.

• Volatile keyword ensures visibility of changes across threads.

• Synchronized blocks provide mutual exclusion and visibility guarantees.

• Without synchronization, threads may see stale or inconsistent data.

• Compiler and CPU optimizations can reorder instructions, affecting execution order.

• The happens-...read more

Java Streams enable parallel processing using ForkJoin framework, but have pitfalls like race conditions and performance issues with small datasets.

• Use parallel streams for CPU-intensive tasks to leverage multiple cores.

• Avoid using parallel streams for small datasets as overhead may outweigh benefits.

• Minimize shared mutable state to prevent race conditions; prefer immutable objects.

• Use forEachOrdered() for order-sensitive operations, but be aware of performance trade-offs.

• Pro...read more

Different types of waits in Selenium include implicit wait, explicit wait, and fluent wait.

• Implicit wait: Waits for a certain amount of time before throwing an exception if an element is not immediately available.

• Explicit wait: Waits for a specific condition to be met before proceeding with the next steps.

• Fluent wait: Waits for a certain condition to be satisfied with a defined polling frequency.

• Examples: Thread.sleep(5000) for a static wait, WebDriverWait for explicit wait, ...read more

The latest video game console is the PlayStation 5.

• The PlayStation 5 (PS5) is the latest console released by Sony.

• It features advanced graphics, fast loading times, and a new DualSense controller.

• Some popular games for the PS5 include Demon's Souls, Spider-Man: Miles Morales, and Ratchet & Clank: Rift Apart.

Test cases for a Music Player

• Test playback of different file formats

• Test volume control functionality

• Test shuffle and repeat options

• Test playlist creation and management

• Test search functionality

• Test interruption handling (e.g. phone call)

• Test compatibility with different headphones/speakers

• Test battery consumption

• Test user interface and user experience

To measure 4 liters using a 3-liter mug and a 5-liter mug, fill the 3-liter mug, pour it into the 5-liter mug, refill the 3-liter mug, pour it into the 5-liter mug until it is full, leaving 1 liter in the 3-liter mug.

• Fill the 3-liter mug and pour it into the 5-liter mug.

• Refill the 3-liter mug and pour it into the 5-liter mug until it is full, leaving 1 liter in the 3-liter mug.

Regression is retesting of previously tested functionality to ensure that changes made to the software have not affected it.

• Regression testing is done to ensure that new changes or fixes have not introduced new bugs or issues.

• It is not necessary to do regression testing on every release, but it should be done on critical functionality or areas that have been changed.

• Regression testing can be done manually or through automation tools like Selenium.

• Examples of regression testin...read more

I would analyze the root cause of the production issue, communicate with the team, and work on a solution to fix the problem.

• Analyze the root cause of the production issue

• Communicate with the team to understand the impact and collaborate on a solution

• Work on fixing the problem and retesting the solution before deploying it to production

RPA stands for Robotic Process Automation. It is a technology that uses software robots to automate repetitive tasks.

• RPA can help reduce errors and increase efficiency in tasks such as data entry and report generation.

• If RPA is not an option, other solutions such as process optimization or manual task delegation may be considered.

• As a test engineer, I would work with the development team to identify the root cause of any issues and propose appropriate solutions.

• For example, i...read more

Yes, I am familiar with agile methodology and use Jira. My strength lies in test automation.

• I have experience working in agile teams and following agile principles

• I am comfortable using Jira for project management and issue tracking

• My strength is in test automation, where I have expertise in tools like Selenium and Appium

• I am also skilled in manual testing and have experience in creating test plans and test cases

Questions related to defect lifecycle, moratorium, NTC Customer, NPA, regression testing, functional testing, and corporate loan.

• Defect lifecycle refers to the stages a defect goes through from discovery to resolution.

• Moratorium is a temporary suspension of an activity.

• NTC Customer refers to a customer who has been declared as 'Not Traceable, Customer' by the bank.

• NPA stands for Non-Performing Asset, a loan that has not been serviced for a certain period of time.

• Regression te...read more

I will plan testing by analyzing the requirements, identifying test scenarios, creating test cases, and executing them.

• Analyze the requirements and identify test scenarios

• Create test cases based on the identified scenarios

• Execute the test cases and report defects

• Perform regression testing to ensure the fixes do not break existing functionality

• Collaborate with the development team to resolve issues

• Ensure the testing is completed within the given timeline

Defect leakage can be handled by identifying the root cause, fixing the issue, and implementing preventive measures.

• Identify the root cause of the defect leakage

• Fix the issue causing the defect leakage

• Implement preventive measures to avoid future defect leakage

• Conduct thorough testing to ensure the defect has been resolved

• Communicate the resolution and preventive measures to the team and stakeholders

Telecom technologies refer to the various technologies used in the telecommunications industry to transmit and receive information.

• Telephony: The technology of transmitting voice signals over long distances.

• Wireless Communication: The transmission of information without the use of physical connections.

• Internet Protocol (IP): The protocol used for transmitting data packets over the internet.

• Fiber Optics: The use of thin strands of glass or plastic to transmit data as pulses of...read more

Possible test cases for a login page

• Verify valid username and password combination

• Verify invalid username and password combination

• Verify login with empty username field

• Verify login with empty password field

• Verify login with special characters in username or password

• Verify login with incorrect case sensitivity in username

• Verify login with incorrect case sensitivity in password

Software Testing Life Cycle involves phases like planning, designing, executing, and reporting. Different methods and levels of testing are used.

• Phases in Software Testing Life Cycle: Planning, Test Design, Test Execution, Test Reporting

• Different methods of testing: Unit Testing, Integration Testing, System Testing, Acceptance Testing

• Different levels of testing: Unit Testing, Integration Testing, System Testing, Acceptance Testing

• Bug Life Cycle or Defect Life Cycle: New, Assi...read more

To convince developers to reject valid defects, it is important to provide clear and detailed evidence of the defect's validity.

• Gather all necessary information about the defect, including steps to reproduce, expected behavior, and actual behavior.

• Provide screenshots or video recordings that clearly demonstrate the defect.

• Include relevant log files or error messages that support the existence of the defect.

• Communicate the impact of the defect on the overall system or user exp...read more

Interview questions for Test Engineer position

• Defect life cycle includes identification, reporting, prioritization, fixing, retesting, and closure

• Regression testing is done to ensure that new changes do not affect existing functionality, while retesting is done to verify if a defect has been fixed

• Examples of testing techniques include black box, white box, and grey box testing

• Specific characteristics of a tester include attention to detail, analytical skills, communication sk...read more

Selenium can be used for testing responsiveness of mobile apps.

• Selenium can simulate user interactions on mobile apps to test responsiveness.

• It can be used to test how the app responds to different screen sizes and orientations.

• Selenium can also be used to test how the app responds to different network conditions.

• Examples of responsiveness testing using Selenium include checking if buttons and links are clickable, if images and videos load properly, and if the app adjusts to ...read more

My framework is based on modular design and utilizes OOP concepts for better code organization and reusability. It provides benefits such as faster test execution and easier maintenance.

• My framework is modular, with each module representing a specific functionality or feature

• I have used OOP concepts such as inheritance, encapsulation, and polymorphism to create reusable code

• For example, I have created a base class for test cases that includes common methods and properties, wh...read more

Explaining the difference between Before Test and Before Method and how link happens between feature and step definition in Cucumber.

• Before Test runs once before all the tests in a test suite while Before Method runs before each test method

• Before Test is used for setting up the environment for the entire test suite while Before Method is used for setting up the environment for each test method

• In Cucumber, the link between feature and step definition is established through the...read more

To perform Data Driven Testing, Excel can be used to store test data and read it using automation tools.

• Create an Excel sheet with test data

• Use automation tools like Selenium to read data from Excel

• Iterate through rows and columns to fetch data

• Use fetched data to perform tests

• Update Excel sheet with test results

JVM is Java Virtual Machine, Java is a high-level programming language, OOPs concepts include inheritance, polymorphism, encapsulation, and abstraction. Overloading is having multiple methods with the same name but different parameters, overriding is implementing a method in a subclass that is already defined in the superclass.

• JVM stands for Java Virtual Machine, it is an abstract machine that provides a runtime environment for Java bytecode to be executed.

• Java was developed ...read more

Answers to common questions asked in a Test Engineer interview.

• Different methods of testing include black box, white box, gray box, regression, smoke, and exploratory testing.

• Verification ensures that the software meets the requirements and specifications, while validation ensures that the software meets the customer's needs and expectations.

• Functional testing is a type of testing that verifies that the software meets the functional requirements and specifications.

• A testcase ...read more

Analog communication uses continuous signals while digital communication uses discrete signals.

• Analog communication uses continuous signals to transmit information while digital communication uses discrete signals.

• Analog communication is based on the variation of continuous physical quantities like voltage, current, or frequency, while digital communication is based on binary code.

• Analog communication is more susceptible to noise and interference, while digital communication ...read more