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Playwright Testing Interview Questions in Gurgaon

36 practice questions with answers for Playwright Testing interviews in Gurgaon.

Playwright Testing jobs in Gurgaon

Gurgaon (Gurugram) is home to many multinational, consulting, fintech and consumer-internet offices. Interviews often expect strong business understanding along with technical skills, especially for analytics and product-facing roles.

Below are 36 questions that match the mix of service, product and domain employers hiring Playwright automation engineers in Gurgaon.

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What do beforeAll and afterAll do?

Fixtures and HooksEasy

Show answer

beforeAll runs once before the tests in its file or describe block, and afterAll runs once after them. In Playwright they run once per worker, so if tests are spread over workers they can run more than once. They suit cheap shared setup. They cannot use test-scoped fixtures like page, so open your own page from the browser fixture if needed.

Your mocked route never fires. What do you check?

Network MockingMedium

Show answer

Check that the route is registered before the request is sent, usually before goto. Compare the pattern with the real URL in the trace network tab, including query strings and host. Make sure a service worker is not handling the request, and set serviceWorkers: 'block' if it is. Also check that another handler is not matching first or the route was not removed.

How is toBeVisible different from toBeAttached?

Locators and AssertionsEasy

Show answer

toBeAttached only checks that the element exists in the DOM. toBeVisible also needs it to have a non-empty bounding box and no visibility:hidden style. A hidden modal can be attached but not visible. Use toBeVisible for anything a user should see, and toBeAttached for hidden inputs or elements whose presence matters more than appearance.

Explain the event loop.

JavaScript and TypeScriptMedium

Show answer

JavaScript runs one call stack and uses queues for async work; the event loop pushes callbacks from the microtask (promises) and task queues when the stack is empty.

What is a generic type parameter constraint, such as T extends object?

JavaScript and TypeScriptHard

Show answer

A constraint limits what types a generic can accept. function pick<T extends object, K extends keyof T>(obj: T, key: K) only accepts objects and keys that exist on them, so pick(user, 'emial') fails at compile time. In test helpers this catches typos in field names and keeps return types precise without using any.

How do you rerun only the tests that failed in a sharded CI run?

Parallel Runs, Sharding & ReportingHard

Show answer

--last-failed works only on the machine that kept the .last-run.json file, so it does not help across shards. Instead collect the failed tests from the merged JSON report or the blob reports, then run them in a follow-up job by file and line or with --grep on their titles. Many teams simply rely on retries and treat any test needing a rerun as flaky.

Why choose Playwright over Selenium?

Playwright CoreMedium

Show answer

Auto-waiting, a built-in test runner, Chromium/Firefox/WebKit with one API, network interception, the trace viewer and parallel runs out of the box — usually faster and less flaky.

How do you mock third-party APIs in UI tests?

Network MockingMedium

Show answer

Use page.route to intercept the call and fulfil it with fixed JSON so tests do not depend on external systems.

What are the risks of relying on an experimental testing feature in a large codebase?

Component TestingHard

Show answer

APIs may change between minor versions, so upgrades can break many tests at once, and documentation or community examples are thinner. To reduce risk, pin versions, wrap mount setup in shared helpers, keep stories simple and read release notes before upgrading. Also keep the end-to-end suite healthy so you are not dependent on one tool for all UI confidence.

What do locator.and() and locator.or() do?

Locators and AssertionsMedium

Show answer

and() returns a locator that matches elements satisfying both locators, for example a button that also has a certain title. or() matches either locator, which helps when the UI may show one of two states, such as a New email button or a security dialog. With or(), wrap the assertion carefully, because if both appear the strict check fails.

What are the serial and parallel modes of test.describe.configure?

Fixtures and HooksMedium

Show answer

test.describe.configure({ mode: 'serial' }) runs tests in order in one worker, and if one fails the rest are skipped. mode: 'parallel' lets tests in one file run across workers. Serial mode suits a true step-by-step flow, but it makes tests depend on each other, so prefer independent tests and use serial only when there is no alternative.

How many workers does Playwright use by default, and how do you change it?

Parallel Runs, Sharding & ReportingEasy

Show answer

By default Playwright uses about half of the logical CPU cores on the machine. You can set workers in playwright.config as a number or a percentage string such as '50%', or override it on the command line with --workers=4. Many teams use process.env.CI ? 2 : undefined so CI runners with few cores are not overloaded while laptops use their full power.

Developers keep changing CSS class names and 40 tests break every sprint. How do you fix this long term?

Locators and AssertionsHard

Show answer

Replace class-based selectors with role, label and text locators, and agree on data-testid for widgets without good semantics. Move all locators into page objects so future changes touch one file. Add a code review rule and a lint check that flags raw CSS selectors. Share a short locator guide with developers so they know which attributes tests depend on.

How do you check colour contrast in Playwright tests?

Visual & Accessibility TestingEasy

Show answer

Playwright has no built-in contrast assertion, so you run axe-core through @axe-core/playwright, whose color-contrast rule checks text against WCAG ratios such as 4.5 to 1 for normal text. Scan pages in each theme, for example after emulating dark mode with colorScheme. Axe may report some elements as needing review, for example text over images, and those need a manual look.

Tell me about a time you refactored duplicated setup into fixtures.

Fixtures and HooksMedium

Show answer

Situation: forty test files each repeated twenty lines of login and data setup. Task: reduce duplication and maintenance. Action: I created fixtures for the logged-in page, a test customer and page objects, migrated files in small reviewed pull requests and wrote a short guide. Result: test files became half the size and setup changes now touch one file.

Locator vs ElementHandle?

Playwright CoreEasy

Show answer

A Locator is lazy, re-resolved on every action and auto-waits (recommended). An ElementHandle points to one DOM node and can go stale.

Why is sharing state between tests through module-level variables a bad idea?

Fixtures and HooksEasy

Show answer

Each worker has its own copy of module variables, so values set in one worker are invisible to others, and order changes between runs. Tests that pass alone fail in parallel or after a retry. Pass data through fixtures, or store it in an external source like the API. Each test should be able to run alone, in any order.

Why does Playwright start a new worker after a test fails?

Parallel Runs, Sharding & ReportingMedium

Show answer

A failed test may leave the browser or worker-scoped fixtures in a bad state, such as an open dialog or corrupted login. To protect the remaining tests, Playwright throws that worker away and starts a fresh one for the next tests. This means worker fixtures run again and beforeAll hooks may run more than once, which is normal and something your setup must tolerate.

In what order do hooks and fixtures run?

Fixtures and HooksEasy

Show answer

Worker fixtures and beforeAll run first for the worker. For each test, the test fixtures it needs are set up, then beforeEach hooks run, then the test body. Afterwards afterEach hooks run, then test fixtures are torn down in reverse order. afterAll and worker fixture teardown run when the worker finishes. Fixtures are lazy, so unused ones never run.

What is testInfo and what can you do with it?

Fixtures and HooksMedium

Show answer

testInfo is passed as the second argument to tests and hooks. It gives the test title, project name, retry number, status and output path. You can attach files, add annotations, change the timeout with testInfo.setTimeout, or skip conditionally. For example, attach extra logs only when testInfo.status differs from testInfo.expectedStatus.

One shard finishes in 4 minutes and another takes 15. How do you balance them?

Parallel Runs, Sharding & ReportingHard

Show answer

Check whether fullyParallel is off, because file-level sharding puts big files together. Turn it on if tests are independent, or split the largest files. Use reportSlowTests and the merged report's durations to find heavy files, and move slow setup into API calls or shared storage state. Also check that one shard is not getting all the tests of a slow project such as WebKit.

How do you install and start a Playwright project?

Playwright CoreEasy

Show answer

Run npm init playwright@latest, which sets up config, example tests and browsers; execute with npx playwright test.

Your test clicks a button before the page's JavaScript has attached its handler, so nothing happens. What do you do?

Locators and AssertionsMedium

Show answer

This is a hydration problem: the button is visible and enabled but not yet interactive. Wait for a signal that the app is ready, such as a loaded data request or a visible element that only appears after hydration, then click. A better fix is to report it to developers, because real users hit the same issue. Avoid fixed waitForTimeout calls.

What are arrow functions?

JavaScript and TypeScriptEasy

Show answer

A short function syntax that does not have its own this and arguments, taking them from the surrounding scope.

How do you shard tests across machines?

Framework Design and CI/CDMedium

Show answer

Use npx playwright test --shard=1/4 in each CI job and merge reports afterwards to reduce total run time.

Tell me about a time you automated a difficult UI flow.

Playwright CoreMedium

Show answer

Situation: a booking page had a custom calendar, drag-to-select seats and a timer. Task: automate the full booking. Action: I used role locators for the calendar, mouse actions for seat selection and page.clock to control the timer, keeping each part in a page object method. Result: the flow ran reliably in CI and replaced a 20-minute manual check.

What is the difference between toHaveScreenshot and toMatchSnapshot?

Visual & Accessibility TestingEasy

Show answer

toHaveScreenshot is for images of a page or locator. It waits for the page to become visually stable, retries the capture until two shots match, and supports options like mask and animations. toMatchSnapshot compares any value you pass in, such as a string, a buffer or text output, against a stored file, without waiting or retrying. Use toHaveScreenshot for UI and toMatchSnapshot for generated text or file content.

How do you handle dialogs such as alerts?

Playwright CoreMedium

Show answer

let vs const vs var?

JavaScript and TypeScriptEasy

Show answer

var is function-scoped and hoisted. let and const are block-scoped; const can't be reassigned (though an object it points to can change). Prefer const, then let.

What does npx playwright test --last-failed do?

Debugging and Trace ViewerEasy

Show answer

It reruns only the tests that failed in the previous run, using the results stored in the test-results folder. It saves time while you fix failures locally because you do not rerun the whole suite. Combine it with --headed or --debug to investigate. Run the full suite again before pushing to confirm nothing else broke.

How do you test that a modal dialog traps focus and returns it when closed?

Visual & Accessibility TestingHard

Show answer

Open the dialog with a button and assert the dialog role is visible and focus moved inside it. Press Tab more times than there are controls and check with toBeFocused that focus never leaves the dialog. Press Escape, assert the dialog is hidden, and check that the opening button is focused again. Running the same test with Shift+Tab covers backward navigation as well.

How do you attach axe results to the Playwright HTML report?

Visual & Accessibility TestingMedium

Show answer

test('cart is accessible', async ({ page }, testInfo) => { await page.goto('/cart'); const results = await new AxeBuilder({ page }).analyze(); await testInfo.attach('axe-results', { body: JSON.stringify(results.violations, null, 2), contentType: 'application/json', }); expect(results.violations).toEqual([]); });

Tell me about a time you introduced component tests to a frontend team.

Component TestingMedium

Show answer

Situation: our end-to-end suite took 40 minutes and most failures were in form validation. Task: speed up feedback. Action: I set up Playwright component tests for the form library, wrote ten examples and a short guide, and paired with two developers on their first tests. Result: validation checks moved to component level, the end-to-end suite dropped to 25 minutes and developers began writing component tests themselves.

What does eslint-plugin-playwright help with?

Framework Design and CI/CDMedium

Show answer

It is a lint plugin with rules for common Playwright mistakes, such as missing await on assertions, leftover test.only or page.pause, forced clicks, fixed waits with waitForTimeout and element handles instead of locators. Running it in pull requests stops bad patterns before review. Teams usually enable the recommended rule set and add a few stricter rules over time.

What does the webServer option do?

Framework Design and CI/CDMedium

Show answer

webServer tells Playwright to start your app with a command, such as npm run start, and wait until a URL or port responds before running tests. reuseExistingServer: !process.env.CI lets you use an already running dev server locally. You can define several servers, for example frontend and a mock API. It shuts them down after the run.

How do you make an API request in Playwright?

API TestingEasy

Show answer

Use the request fixture: const res = await request.get('/api/users'); expect(res.ok()).toBeTruthy(); const body = await res.json();

Companies with offices in Gurgaon (51)

Consulting

Accenture

Playwright Testing interview questions

40 questions
4 rounds

Bengaluru, Hyderabad, Pune +2

Playwright Testing Interview Questions in Gurgaon

Playwright Testing jobs in Gurgaon

What do beforeAll and afterAll do?

Your mocked route never fires. What do you check?

How is toBeVisible different from toBeAttached?

Explain the event loop.

What is a generic type parameter constraint, such as T extends object?

How do you rerun only the tests that failed in a sharded CI run?

Why choose Playwright over Selenium?

How do you mock third-party APIs in UI tests?

What are the risks of relying on an experimental testing feature in a large codebase?

What do locator.and() and locator.or() do?

What are the serial and parallel modes of test.describe.configure?

How many workers does Playwright use by default, and how do you change it?

Developers keep changing CSS class names and 40 tests break every sprint. How do you fix this long term?

How do you check colour contrast in Playwright tests?

Tell me about a time you refactored duplicated setup into fixtures.

Locator vs ElementHandle?

Why is sharing state between tests through module-level variables a bad idea?

Why does Playwright start a new worker after a test fails?

In what order do hooks and fixtures run?

What is testInfo and what can you do with it?

One shard finishes in 4 minutes and another takes 15. How do you balance them?

How do you install and start a Playwright project?

Your test clicks a button before the page's JavaScript has attached its handler, so nothing happens. What do you do?

What are arrow functions?

How do you shard tests across machines?

Tell me about a time you automated a difficult UI flow.

What is the difference between toHaveScreenshot and toMatchSnapshot?

How do you handle dialogs such as alerts?

let vs const vs var?

What does npx playwright test --last-failed do?

How do you test that a modal dialog traps focus and returns it when closed?

How do you attach axe results to the Playwright HTML report?

Tell me about a time you introduced component tests to a frontend team.

What does eslint-plugin-playwright help with?

What does the webServer option do?

How do you make an API request in Playwright?

Companies with offices in Gurgaon (51)

Accenture

Deloitte

Amazon

Google

Meta

Microsoft

Apple

Adobe

Salesforce

LinkedIn

Uber

Walmart

Zomato

Mastercard

DE Shaw

Tower Research Capital

IBM

EY

KPMG

PwC

Publicis Sapient

Nagarro

EPAM Systems

GlobalLogic

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