40+ Quality Assurance Engineer Interview Questions and Answers

The question asks to count the number of occurrences of each character in a given string, ignoring case and wild card characters.

• Convert the string to lowercase to ignore case.

• Remove any wild card characters from the string.

• Create an array of size 26 to store the count of each character.

• Iterate through each character in the string and increment the count in the array accordingly.

• Return the array of counts as the result.

HashMap is used for efficient key-value pair storage and retrieval.

• HashMap provides constant time complexity for basic operations like get and put.

• It allows storing unique keys and their corresponding values.

• HashMap is suitable for scenarios where fast lookup is required.

• Other collections like ArrayList or LinkedList have different use cases and performance characteristics.

To understand customer needs, we can use surveys, feedback, and data analysis. To reduce rejection and rework, we can implement quality control measures and continuous improvement processes.

• Conduct surveys and gather feedback from customers to understand their needs and expectations

• Analyze data on customer complaints and product defects to identify areas for improvement

• Implement quality control measures such as inspections and testing to catch defects before they reach the cu...read more

Integration testing is a type of testing where individual units are combined and tested as a group.

• Integration testing is performed after unit testing and before system testing.

• It verifies the interactions between different modules of the software.

• It helps to identify defects early in the development cycle.

• It can be done using top-down or bottom-up approach.

• Example: Testing the integration between a payment gateway and an e-commerce website.

• Current methodology of testing incl...read more

QA focuses on preventing defects, while QC emphasizes identifying defects in products.

• QA is process-oriented, ensuring that the right processes are followed to prevent defects.

• QC is product-oriented, focusing on identifying defects in the final product.

• Example of QA: Implementing a standardized testing process to ensure consistent quality.

• Example of QC: Conducting inspections and testing on finished products to catch defects.

PPAP ensures that suppliers meet quality standards before mass production.

• PPAP is a standardized process used in the automotive and manufacturing industries.

• It involves submitting documentation and samples to verify that production parts meet specifications.

• Key elements include Design Records, Engineering Change Documents, and Process Flow Diagrams.

• For example, a supplier must provide a sample part and a report demonstrating it meets all requirements.

• PPAP helps identify poten...read more

Dynamic elements in Selenium can be handled using various techniques like explicit waits, dynamic xpath, and handling stale elements.

• Use explicit waits to wait for the element to become clickable or visible before interacting with it

• Use dynamic xpath to locate elements based on changing attributes or values

• Handle stale elements by refreshing the page or re-locating the element before interacting with it

Functional testing verifies specific functionalities of a system, while non-functional testing assesses performance and usability aspects.

• Purpose: Functional testing focuses on what the system does, ensuring that all features work as intended, e.g., login functionality.

• Non-Functional Testing: This type evaluates how the system performs under various conditions, such as load testing for response times.

• Types: Functional testing includes unit testing, integration testing, and sy...read more

Critical dimensions in a drawing are key measurements that must be accurate for the part to function correctly.

• Critical dimensions are typically specified with tight tolerances to ensure accuracy

• They are often labeled with symbols like GD&T for clarity

• Examples include hole diameters, distances between features, and angles of intersections

GD&T (Geometric Dimensioning and Tolerancing) is a system for defining and communicating engineering tolerances.

• GD&T uses symbols to convey complex geometric requirements clearly.

• It helps in ensuring parts fit together correctly in assembly.

• Example: A flatness tolerance ensures a surface is within a specified flatness range.

• It improves manufacturing efficiency by reducing ambiguity in specifications.

• GD&T is essential for quality control and inspection processes.

I have extensive experience with IATF audits, focusing on compliance and continuous improvement in quality management systems.

• Participated in multiple IATF 16949 audits, ensuring adherence to automotive quality standards.

• Conducted internal audits to prepare for IATF audits, identifying areas for improvement.

• Collaborated with cross-functional teams to address non-conformities found during audits.

• Implemented corrective actions based on audit findings, leading to improved proces...read more

Parameterization is the process of replacing hard-coded values with variables in performance testing scripts.

• Parameterization helps in creating realistic load scenarios by varying input data

• It reduces script maintenance efforts by centralizing data

• It enables reuse of scripts for different data sets

• Examples of parameterization include replacing user IDs, passwords, and input data with variables

I expect a CTC that reflects my skills, experience, and the industry standards for a Quality Assurance Engineer.

• Research industry standards: For example, QA Engineers in my region typically earn between $70,000 and $90,000 annually.

• Consider my experience: With 5 years in QA, I would expect a CTC on the higher end of the scale.

• Include benefits: A comprehensive package including health insurance, bonuses, and professional development opportunities is important.

• Be open to negoti...read more

NDC stands for National Drug Code.

• NDC is a unique 10-digit code used to identify drugs in the United States.

• It is used for drug registration, billing, and reimbursement purposes.

• The code consists of three segments: labeler code, product code, and package code.

• Example: 12345-6789-10, where 12345 is the labeler code, 6789 is the product code, and 10 is the package code.

The least count of a Vernier Caliper is the smallest measurement it can accurately read, typically 0.02 mm or 0.01 mm.

• The least count is determined by the smallest division on the main scale and the Vernier scale.

• For a standard Vernier Caliper, the least count is often 0.02 mm (or 0.001 inches).

• Example: If the main scale has divisions of 1 mm and the Vernier scale has 50 divisions over 49 mm, the least count is 0.02 mm.

• A smaller least count allows for more precise measurement...read more

Two essential tools for QA testing are test management software and automated testing frameworks.

• Test Management Tools: These help in planning, tracking, and managing testing activities. Example: JIRA, TestRail.

• Automated Testing Frameworks: These allow for the automation of test cases to improve efficiency. Example: Selenium, JUnit.

• Continuous Integration Tools: These integrate automated tests into the development process. Example: Jenkins, CircleCI.

• Bug Tracking Tools: Essenti...read more

Measuring instruments are tools used to quantify physical properties such as length, weight, temperature, etc.

• Types of measuring instruments include rulers, scales, thermometers, micrometers, calipers, etc.

• They are used to ensure accuracy and precision in measurements.

• Measuring instruments can be analog or digital, depending on the application.

• Examples of measuring instruments: tape measure, kitchen scale, pH meter, pressure gauge, etc.

Test scenarios for an application include both positive and negative cases to ensure comprehensive coverage.

• Positive Scenario: User successfully logs in with valid credentials.

• Negative Scenario: User fails to log in with incorrect password.

• Positive Scenario: User can add an item to the shopping cart.

• Negative Scenario: User attempts to add an out-of-stock item to the cart.

• Positive Scenario: User receives a confirmation email after registration.

• Negative Scenario: User tries to ...read more

Material strength refers to its ability to withstand applied forces without failure.

• Tensile Strength: Resistance to being pulled apart; e.g., steel cables.

• Compressive Strength: Resistance to being compressed; e.g., concrete in buildings.

• Shear Strength: Resistance to sliding forces; e.g., rivets in metal structures.

• Flexural Strength: Resistance to bending; e.g., beams in bridges.

• Fatigue Strength: Resistance to repeated loading; e.g., aircraft wings.

Selenium is a powerful tool for automating web applications for testing purposes, supporting multiple browsers and programming languages.

• Cross-Browser Testing: Selenium supports various browsers like Chrome, Firefox, and Safari, allowing tests to run on different platforms.

• Multiple Language Support: Tests can be written in various programming languages such as Java, Python, C#, and Ruby, providing flexibility to developers.

• WebDriver API: Selenium WebDriver provides a programm...read more

Quality means meeting or exceeding user expectations through reliability, performance, and continuous improvement.

• User Satisfaction: Quality ensures that the product meets user needs, like a bug-free app that enhances user experience.

• Reliability: A quality product consistently performs well under expected conditions, such as a car that starts every time.

• Performance: Quality involves efficiency, like a website that loads quickly and handles high traffic without crashing.

• Compli...read more

Program to find the largest number in an array of strings

• Convert each string in the array to a number

• Iterate through the array to find the largest number

• Return the largest number found

RPN stands for Reverse Polish Notation, a mathematical notation where operators are placed after their operands.

• RPN is a postfix notation, meaning that operators are written after their operands.

• It eliminates the need for parentheses to indicate the order of operations.

• RPN is commonly used in calculators and computer programming languages.

• Example: In RPN, the expression '3 + 4' would be written as '3 4 +'.

I am a dedicated Quality Assurance Engineer with a passion for ensuring software excellence through meticulous testing and analysis.

• Over 5 years of experience in software testing and quality assurance.

• Proficient in both manual and automated testing, using tools like Selenium and JUnit.

• Strong understanding of SDLC and STLC processes, ensuring quality at every stage.

• Experience in writing clear and concise test cases and bug reports.

• Collaborated with cross-functional teams to im...read more

The best testing approach in a supply chain platform involves end-to-end testing, integration testing, performance testing, and security testing.

• Conduct end-to-end testing to ensure all components work together seamlessly

• Perform integration testing to check interactions between different systems

• Conduct performance testing to assess system scalability and response times

• Perform security testing to identify vulnerabilities and ensure data protection

Regression testing ensures new code changes do not adversely affect existing functionality. Smoke testing verifies basic functionality.

• Regression testing involves retesting existing functionality to ensure new code changes have not introduced bugs or issues

• Smoke testing is a preliminary test to check if the basic functionalities of the software are working fine

• Regression testing is usually automated to save time and effort

• Smoke testing is often done manually and is a quick ch...read more

Wait methods in Selenium are used to pause the execution of the test script for a certain amount of time.

• Implicit Wait: Used to set a default waiting time for the elements to be found on the page.

• Explicit Wait: Used to wait for a certain condition to occur before proceeding further in the test script.

• Fluent Wait: Used to define the maximum amount of time to wait for a specific condition, as well as the frequency with which to check the condition.