Question 1

What are the key differences between Cypress and Playwright, and when would you choose one over the other?

Accepted Answer

Cypress and Playwright are both modern end-to-end testing frameworks, but they differ in architecture, browser support, and philosophy. Understanding these differences helps you make the right choice for your project.

Cypress runs directly inside the browser using a unique architecture where the test runner lives in the same event loop as your application. This gives it native access to the DOM and network layer, which makes it excellent for debugging. You get time-travel debugging, automatic waiting, and a built-in dashboard for viewing test runs. However, Cypress historically only support

Question 2

What is the Page Object Model pattern in test automation, and why is it considered a best practice?

Accepted Answer

The Page Object Model, commonly known as POM, is a design pattern that creates an abstraction layer between your test scripts and the UI elements they interact with. Each page or significant component in your application gets its own class or module that encapsulates the locators and actions for that page.

In a typical implementation, a Page Object contains the selectors for elements on the page and methods that represent user actions. For example, a LoginPage object might have properties for the username field, password field, and submit button, along with a login method that fills in cred

Question 3

What is a test gate in a CI/CD pipeline, and why is it important for maintaining software quality?

Accepted Answer

A test gate, also called a quality gate, is a checkpoint in a CI/CD pipeline that must pass before code can advance to the next stage. It acts as an automated gatekeeper that prevents broken, untested, or substandard code from reaching production.

Test gates work by defining pass/fail criteria at specific points in the pipeline. The most common gates include unit test gates that run after code compilation, integration test gates that run after unit tests pass, code coverage gates that enforce a minimum coverage threshold, and E2E test gates that run before deployment to staging or productio

Question 4

How do you configure test automation to run as part of a GitHub Actions workflow?

Accepted Answer

Configuring test automation in GitHub Actions involves creating a workflow YAML file that defines when tests run, what environment they need, and how results are reported. Here is a practical walkthrough of the key elements.

The workflow file lives in .github/workflows/ and is triggered by events like push, pull_request, or schedule. For test automation, the most common trigger is pull_request targeting the main branch, ensuring every PR is tested before merge. You might also run tests on push to main for post-merge validation.

The job configuration starts with selecting a runner. For we

Question 5

What are the different types of performance testing, and when would you use each one?

Accepted Answer

Performance testing is a broad category that encompasses several specific test types, each designed to evaluate different aspects of system behavior under various conditions. Understanding when to apply each type ensures you are testing the right things at the right time.

Load testing evaluates how the system performs under expected user loads. You simulate the number of concurrent users and transaction rates that the application is designed to handle. For example, if your application serves ten thousand concurrent users during peak hours, a load test simulates that exact scenario. The goal

Question 6

What are the key performance metrics you track during a load test, and what do they tell you about the system?

Accepted Answer

Performance metrics are the quantitative measurements that tell you whether your system meets its performance requirements. Tracking the right metrics and understanding what they represent is fundamental to meaningful performance testing.

Response time is the most user-visible metric. It measures how long the system takes to respond to a request. I track several percentiles rather than just the average. The median or P50 shows typical user experience. The P90 shows what ninety percent of users experience. The P95 and P99 reveal the tail latency that affects a smaller but still significant p

Question 7

What is the OWASP Top 10, and why is it important for QA engineers to understand it?

Accepted Answer

The OWASP Top 10 is a regularly updated list of the ten most critical security risks to web applications, published by the Open Web Application Security Project. It serves as the de facto standard for understanding the most common and impactful web security vulnerabilities, and it is essential knowledge for QA engineers who want to test effectively for security.

The current list includes risks like injection attacks, where untrusted data is sent to an interpreter as part of a command or query. SQL injection is the classic example, where an attacker inserts SQL commands through an input fiel

Question 8

What is the difference between SAST and DAST, and how do they complement each other in the testing process?

Accepted Answer

SAST and DAST are two complementary approaches to security testing that examine your application from different angles. Understanding both is essential for building a comprehensive security testing strategy.

Static Application Security Testing, or SAST, analyzes your source code, bytecode, or binary without executing the application. It works like a specialized code review that looks for patterns known to introduce vulnerabilities. SAST tools scan through the codebase looking for issues like hardcoded credentials, SQL queries built with string concatenation, missing input validation, insecu

Question 9

What is cross-browser testing, and why is it necessary even with modern web standards?

Accepted Answer

Cross-browser testing verifies that a web application functions correctly and looks consistent across different browsers, browser versions, and rendering engines. Despite significant progress in web standards, cross-browser testing remains necessary because real-world differences between browsers continue to affect user experience.

Modern browsers generally agree on core web standards, but differences persist in several areas. CSS rendering varies in subtle ways, particularly for newer features like grid, flexbox gap, and container queries. A layout that looks perfect in Chrome might have s

Question 10

What is BrowserStack, and how does it help with cross-browser and mobile testing?

Accepted Answer

BrowserStack is a cloud-based testing platform that provides access to real browsers and real devices for testing web and mobile applications. It eliminates the need for maintaining an in-house device lab by offering on-demand access to thousands of browser and device combinations.

The core offering includes several products. BrowserStack Live provides interactive access to real browsers on real operating systems. You select a browser, version, and OS combination, and a remote session opens in your browser. You interact with your application as if it were running locally on that device. Thi

QA / Test Engineer

Topics

Test Automation Frameworks

CI/CD Testing Integration

Performance Testing

Security Testing

Mobile & Cross-Browser Testing

Mock Interview

Quick Stats