Tester Interview Questions at Capgemini

Write Playwright code to handle multiple windows (browser contexts/tabs) and perform actions on a new page. Explain the difference between new page events and popup events, and how to wait for a page load before interacting.

Explain the difference between PUT and PATCH in REST APIs. When is each appropriate? Show how you would test both verbs using Playwright's APIRequestContext, and explain how to validate partial vs full resource updates.

Explain the different types of locators available in Playwright (CSS, XPath, text, role, test-id). Which are most resilient and why? Explain why role-based locators are preferred over XPath for accessibility and test stability.

What is the Page Object Model (POM) design pattern in Selenium? Why is it used? Show the structure of a POM class for a login page and explain how it improves test maintainability.

How do you test a REST API that requires OAuth 2.0 authentication? Walk through obtaining a token (client credentials flow), storing it, using it in subsequent requests, and handling token expiry in your automation framework.

Explain the filter(), map(), and reduce() array methods in JavaScript with examples. Show how you would use them together to process a list of test results: filtering failures, mapping to error messages, and reducing to a summary count.

Explain the difference between Playwright's page.fill(), page.type(), and page.locator().pressSequentially(). When would you use each? How does Playwright handle Angular or React forms that rely on input events?

What is test reporting in automation? How do you generate Allure reports in a Playwright/TestNG framework? What information should a good test report contain and how do you integrate it with your CI/CD pipeline?

Explain the debug process in Playwright. Cover Playwright Inspector (PWDEBUG=1), trace viewer (playwright show-trace), headed mode, slow-motion, and how to capture video/screenshots on test failure for CI debugging.

What is cross-browser testing? How do you run the same Playwright test suite on Chrome, Firefox, and WebKit simultaneously? How do you handle browser-specific issues in your automation code?