01
How do you handle GraphQL APIs in Playwright?
Show answer
POST the query and variables as JSON to the single endpoint and assert both data and errors fields in the response.
Playwright Testing Interview Questions in Thiruvananthapuram
36 practice questions with answers for Playwright Testing interviews in Thiruvananthapuram.
Playwright Testing jobs in Thiruvananthapuram
Thiruvananthapuram's Technopark is one of India's oldest IT parks, hosting IT-services, product and engineering-services companies. Data and testing teams here often work with global clients in finance, travel and healthcare.
Below are 36 questions that match the mix of service, product and domain employers hiring Playwright automation engineers in Thiruvananthapuram.
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02
Explain the event loop.
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.
03
How do you validate an API response in Playwright?
Show answer
Assert the status with expect(res.status()).toBe(200), parse res.json() and check fields, using schema validation for the structure.
04
What are higher-order functions?
Show answer
Functions that take other functions as arguments or return them, such as map, filter and reduce, or a helper that wraps retry logic around a test step.
05
How do you read a Playwright timeout error message?
Show answer
The error names the action and locator, for example locator.click: Timeout 30000ms exceeded, followed by a call log. The call log lists each attempt, such as waiting for the element to be visible, enabled and stable, or another element intercepting pointer events. The last lines show what blocked the action. Read it before changing timeouts.
06
A trace shows the click landed on an overlay instead of the button. How do you fix it?
Show answer
The call log will say another element intercepts pointer events. Find what the overlay is, such as a loading mask, cookie banner or chat widget. Wait for it to disappear with expect(overlay).toBeHidden(), or close it in a fixture. Do not use force: true, because it hides a real issue: a user would also be blocked by that overlay.
07
What is async/await?
Show answer
Syntax over Promises: an async function returns a Promise and await pauses until it resolves. Every Playwright action returns a Promise, so you await each step.
08
How do you mock a paginated endpoint that returns different data per page?
Show answer
await page.route('**/api/products?*', route => {
const url = new URL(route.request().url());
const p = Number(url.searchParams.get('page') ?? 1);
const items = Array.from({ length: 10 }, (_, i) => ({ id: (p - 1) * 10 + i }));
return route.fulfill({ json: { items, hasNext: p < 3 } });
});
09
What is APIRequestContext?
Show answer
The object behind the request fixture that holds base URL, headers and cookies, and can share cookies with a browser context.
10
A test must confirm that an error banner does not appear, but it always waits the full timeout. How do you fix it?
Show answer
Use a web-first negative assertion such as await expect(banner).toBeHidden() or not.toBeVisible(); they pass as soon as the element is absent, so they do not wait the full timeout. The real problem is timing: assert after a positive signal, such as the success message appearing, otherwise the banner may simply not have rendered yet and the check passes too early.
11
How do you emulate a mobile device in Playwright?
Show answer
Import devices from @playwright/test and spread a profile into a project or test.use, for example use: { ...devices['Pixel 7'] }. This sets viewport, user agent, device scale factor, touch support and isMobile. It emulates the browser, not a real phone, so it is good for responsive layout tests but not a replacement for real-device testing.
12
What is the difference between == and === in JavaScript?
Show answer
=== compares value and type without conversion, so '5' === 5 is false. == converts types first, so '5' == 5 is true and null == undefined is true. Implicit conversion causes surprising bugs, so test code should always use === and !==. TypeScript and lint rules such as eqeqeq help enforce this.
13
How do you test offline behaviour?
Show answer
Call context.setOffline(true) to cut all network access for the context, then check that the app shows an offline banner or queues actions. Switch back with setOffline(false) and verify it syncs. You can also set offline: true in the context options. For a single failing endpoint, use route.abort instead of going fully offline.
14
What are discriminated unions and how can they model API responses?
Show answer
A discriminated union is a union of object types that share one literal field, such as status: 'ok' with data, or status: 'error' with a message. Checking the status field narrows the type, so TypeScript only allows data in the ok branch. In test helpers this forces you to handle the error case and prevents reading fields that do not exist.
15
How do you handle errors in async code?
Show answer
Use try-catch with await, or .catch() on promises, and make sure rejected promises are never left unhandled.
16
What can automated accessibility tools not catch?
Show answer
Scanners like axe find rule-based problems such as missing labels, bad contrast or invalid ARIA, which is roughly a third to a half of real issues. They cannot judge whether alt text is meaningful, whether focus order makes sense, whether error messages are understandable, or whether a screen reader user can actually finish the task. So automated scans are combined with keyboard tests and periodic manual checks with screen readers.
17
How do you manage test data and environments?
Show answer
Use environment variables or .env files, a baseURL in config, API calls for setup and cleanup, and unique data per run.
18
What are generics in TypeScript?
Show answer
Placeholders for types that make reusable code type-safe, for example a helper function returning the same type of item that it receives.
19
How do you run the same visual tests at mobile, tablet and desktop sizes?
Show answer
Create one project per size in playwright.config, for example using devices['Pixel 7'], devices['iPad Mini'] and a desktop viewport, and point them at the same visual test files with testMatch or a tag. Because the project name is part of the baseline file name, each size keeps its own images automatically. This keeps the test code identical while covering responsive layouts.
20
Write a test that updates a user with PUT and verifies the change.
Show answer
test('update user', async ({ request }) => {
const res = await request.put('/api/users/12', {
data: { name: 'Neha', city: 'Jaipur' },
});
expect(res.status()).toBe(200);
const get = await request.get('/api/users/12');
expect(await get.json()).toMatchObject({ name: 'Neha', city: 'Jaipur' });
});
21
What is the difference between a type annotation and a type assertion with as?
Show answer
A type annotation such as const user: User = data asks the compiler to check that the value really fits User. A type assertion such as data as User tells the compiler to trust you, so mismatches are not reported. In test code assertions are risky on API responses, because a wrong field passes compilation and fails later. Prefer annotations, type guards or runtime schema validation.
22
An axe scan reports 40 violations on a legacy page. How do you add accessibility checks without blocking every build?
Show answer
Record the current violations as a known baseline, for example by snapshotting violation ids and targets, and fail only on new ones. Fix the worst issues first, such as missing labels and contrast on key flows, and shrink the baseline every sprint. Make new pages and components meet zero violations from day one. Report the trend to the team so the debt is visible rather than silently ignored.
23
Why can beforeAll run more than once in a Playwright run?
Show answer
Each worker is a separate process with its own state. When tests from a file are split across workers, or a worker restarts after a failure, beforeAll runs again in the new worker. So never assume it runs only once globally. For one-time setup across the whole run, use a setup project with dependencies or globalSetup.
24
What is the playwright/index.tsx file used for?
Show answer
It is the entry file bundled into the component test page, so it runs in the browser before every mount. You import global CSS, fonts and theme files there, and register beforeMount and afterMount hooks to wrap components in providers such as a router, theme or state store. Keeping this setup in one place means individual tests can mount components without repeating boilerplate.
25
Tell me about a time you explained a failing test report to a non-technical stakeholder.
Show answer
Situation: a product manager saw a red build and wanted to delay the release. Task: explain what actually failed. Action: I opened the HTML report, grouped failures into one real bug in the coupon flow and two flaky tests, and showed the screenshot of the real bug in plain words. Result: we shipped after the coupon fix, and the manager asked for that short summary on every release.
26
How do you handle file uploads and downloads?
Show answer
setInputFiles on the input for uploads; for downloads wait on page.waitForEvent('download') and save or inspect the file.
27
How do you test a file download?
Show answer
const [download] = await Promise.all([
page.waitForEvent('download'),
page.getByText('Export').click(),
]);
await download.saveAs('reports/file.csv');
28
An endpoint streams server-sent events. How would you test it with Playwright?
Show answer
The request fixture returns the full body only after the stream ends, so for a short finite stream you can read text() and parse each data line. For long-lived streams, test in the browser: open the page that uses EventSource, or open it inside page.evaluate, collect events into an array and assert with expect.poll. Mock the source with a route when you need precise timing.
29
What are automatic fixtures?
Show answer
A fixture defined with { auto: true } runs for every test even when the test does not ask for it. It is useful for cross-cutting work such as attaching console logs on failure, setting a feature flag or checking for leftover data. Keep auto fixtures light, because they add cost to every test in the suite.
30
What is Playwright component testing?
Show answer
Component testing mounts a single UI component, such as a React or Vue button or form, in a real browser page and tests it with the normal Playwright API. Playwright bundles the component with Vite, serves it on a small page and gives you a mount fixture. You get real browser rendering and events, which unit tests in jsdom cannot give, while staying much faster than full end-to-end flows. The feature is still marked experimental.
31
How do you set test timeouts?
Show answer
Use timeout and expect.timeout in config, test.setTimeout() for one test and test.slow() for known slower tests.
32
Your mocked route never fires. What do you check?
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.
33
How do you test API error scenarios?
Show answer
Send invalid payloads or missing auth and assert 400, 401 or 404 codes and the error message bodies.
34
What does maxFailures do?
Show answer
maxFailures stops the run after a set number of test failures, for example maxFailures: process.env.CI ? 10 : undefined. If an environment is down and every test fails, the build stops early instead of burning an hour of CI time. Set it high enough that a few real failures still show their full picture.
35
Test data is left behind when tests fail midway. How do you guarantee cleanup?
Show answer
Create the data inside a fixture and delete it after await use(). Fixture teardown runs even when the test fails or times out, so cleanup is reliable. Avoid cleanup steps at the end of the test body, because they never run after a failed assertion. As a safety net, tag test data with a prefix and run a nightly cleanup job.
36
What does the JSON reporter output and how would you use it?
Show answer
The JSON reporter writes the full suite tree with every test, its status, retries, duration, errors and attachment paths into one file. Teams parse it in scripts to post a summary to chat, to collect flaky tests that passed on retry, or to push results to a database for trends. Set outputFile so the JSON does not mix with console output.
Companies with offices in Thiruvananthapuram (3)
IT services
UST
Playwright Testing interview questions
Thiruvananthapuram, Kochi, Bengaluru +2
View questionsIT services
Tata Elxsi
Playwright Testing interview questions
Bengaluru, Thiruvananthapuram, Chennai +1
View questionsIT services
Quest Global
Playwright Testing interview questions
Bengaluru, Thiruvananthapuram, Belagavi +1
View questionsFew big employers listed in Thiruvananthapuram?
Many Thiruvananthapuram candidates also apply to teams in Bangalore and to remote or hybrid roles. Practise the Bangalore set as well.
Frequently asked questions
Which companies hire Playwright Testing professionals in Thiruvananthapuram?
Companies with large offices in Thiruvananthapuram include UST, Tata Elxsi, Quest Global. Use their company pages below to practise employer-specific sets.
Are Playwright Testing interviews in Thiruvananthapuram different from other cities?
The questions depend more on the company than the city. Thiruvananthapuram's mix of employers decides the style: Data and testing teams here often work with global clients in finance, travel and healthcare
How do I find Playwright Testing jobs in Thiruvananthapuram?
Shortlist companies with Thiruvananthapuram offices, keep your CV focused on Playwright Testing projects, apply on company career pages and job portals with the Thiruvananthapuram filter, and practise the questions on this page before each interview.
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