01
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');
Fractal Analytics Playwright Testing Interview Questions & Answers
Curated interview practice questions with answers. These are practice scenarios, not a verified list of past interview questions.
About Fractal Analytics hiring for Playwright Testing roles
Fractal Analytics is an AI and analytics company working with large global enterprises in consumer goods, retail, healthcare and financial services. It provides data science, data engineering and AI products. In India it hires for data analysts, data scientists, data engineers, ML engineers and analytics consultants.
For Playwright Testing roles, this Fractal Analytics practice set focuses most on Framework Design and CI/CD (7), Debugging and Trace Viewer (5), Visual & Accessibility Testing (5), Network Mocking (5). It has 6 easy, 29 medium, 5 hard questions, so you can start easy and work up to the harder ones.
- Company type
- Analytics
- Headquarters
- Mumbai, India
- Main India offices
- Mumbai, Bengaluru, Gurugram, Pune
Fractal Analytics Playwright Testing interview process
- Online assessment (aptitude + SQL + Python or statistics)
- Technical round 1
- Technical round 2 or case round
- Hiring manager round
- HR round
Typical pattern based on public candidate experiences. Rounds vary by role, team and year.
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02
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.
03
How do you test accessibility with Playwright?
Show answer
Integrate axe-core through @axe-core/playwright, run an analysis on the page and assert that there are no violations.
04
Why should the Playwright Docker image version match your package version?
Show answer
Each Playwright version expects specific browser builds. The official Playwright Docker image tagged v1.x.y-noble contains the browsers for that exact version. If package.json has a different version, tests fail because browsers are missing or mismatched. Pin both together and update them in the same pull request.
05
What is the difference between toHaveScreenshot and toMatchSnapshot?
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.
06
How do you mock API calls made by a component in a component test?
Show answer
Newer Playwright versions provide a router fixture in component tests. You call router.route with a URL pattern and fulfil it with test data, much like page.route, and it can also use mock handlers written for Mock Service Worker. Alternatively, inject a fake data client through props or a provider in hooksConfig. Mocking keeps component tests fast and independent of any backend.
07
How do you record a trace manually with the tracing API?
Show answer
Call await context.tracing.start({ screenshots: true, snapshots: true }) before the steps, and await context.tracing.stop({ path: 'trace.zip' }) after them. This is useful in scripts that use the library without the test runner, or when you want a trace of only part of a flow. tracing.group can label sections of steps.
08
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.
09
Write a GitHub Actions job that runs the suite in four shards.
Show answer
jobs:
e2e:
runs-on: ubuntu-latest
strategy:
fail-fast: false
matrix:
shard: [1, 2, 3, 4]
steps:
- uses: actions/checkout@v4
- uses: actions/setup-node@v4
- run: npm ci && npx playwright install --with-deps
- run: npx playwright test --shard=${{ matrix.shard }}/4 --reporter=blob
- uses: actions/upload-artifact@v4
with:
name: blob-${{ matrix.shard }}
path: blob-report
10
How do you reuse login state across tests?
Show answer
Log in once in global setup, save storageState to a JSON file and set use.storageState in the config so every test starts logged in.
11
How do you run tests in Docker?
Show answer
Use the official Playwright image which contains browsers and dependencies, mount the project and run npx playwright test for consistent CI environments.
12
How do you measure API response time?
Show answer
Record timestamps around the request or use response timing, then assert the duration is under an agreed threshold.
13
Write a visual assertion that masks a live clock and an ad banner.
Show answer
// masked areas are painted with a solid box
await expect(page).toHaveScreenshot('home.png', {
mask: [
page.getByTestId('live-clock'),
page.locator('.ad-banner'),
],
maskColor: '#FF00FF',
animations: 'disabled',
fullPage: true,
});
14
How do you debug a Playwright test?
Show answer
Use --debug or the Inspector, page.pause(), UI mode, the trace viewer and headed runs with slowMo.
15
What are interfaces and types in TypeScript?
Show answer
Both describe the shape of data. Interfaces are extendable and suit object contracts; type aliases can also model unions and primitives.
16
How do you listen to all network requests on a page?
Show answer
Subscribe to events: page.on('request', r => ...), page.on('response', r => ...) and page.on('requestfailed', r => ...). You can log URLs, collect API calls or count failures. Unlike route, listeners only observe and cannot change traffic. They are handy for checks like 'no request returned a 5xx status during this flow'.
17
How do you reduce the execution time of a 2000-test suite?
Show answer
Run in parallel with sharding, reuse authentication state, set up data through APIs, avoid unnecessary waits, run smoke on every commit and the full suite nightly.
18
Tests pass with one worker but fail with eight. How do you debug this?
Show answer
This usually means tests share something: the same user account, the same records or a global server setting. Run the failing file with --workers=8 and --repeat-each to reproduce it. Look at which tests run at the same time in the report. Fix it by giving each test unique data, using workerIndex in names, or isolating shared settings per worker.
19
Write an API test with the request fixture.
Show answer
test('get user', async ({ request }) => {
const res = await request.get('/api/users/1');
expect(res.ok()).toBeTruthy();
expect((await res.json()).id).toBe(1);
});
20
When should you choose a component test over an end-to-end test?
Show answer
Choose a component test when the behaviour lives inside one component: validation messages, disabled states, sorting in a table, keyboard handling in a dropdown or rendering of edge-case data. These are slow and awkward to reach through full flows. Choose end-to-end when the risk is in integration, such as routing, authentication or data saved on the server.
21
How do access modifiers help in page object classes?
Show answer
private and protected hide internal locators and helper steps, so tests can only call meaningful public methods such as login or addToCart. This keeps tests readable and lets you change internals without breaking callers. readonly on the page field prevents it from being replaced. TypeScript enforces these at compile time only, not at runtime.
22
A product list uses infinite scroll. How do you test that more items load?
Show answer
Count the items, then scroll the last item into view with lastItem.scrollIntoViewIfNeeded() or page.mouse.wheel. Assert with expect(items).toHaveCount greater than before, for example using expect.poll on items.count(). Repeat until an end-of-list message appears. Also check no duplicates appear and that a loading indicator shows while fetching.
23
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.
24
A designer changes the primary button colour and 300 visual tests fail at once. How do you handle it?
Show answer
First confirm the change is intended and check a sample of diffs to make sure nothing else moved. Then regenerate baselines in the CI Docker environment in a separate commit, so reviewers can see only image changes. Longer term, reduce the count: most of those tests should not snapshot full pages. Keep a few page-level shots and move detail checks to component-level screenshots of key states.
25
Tell me about a time an accessibility check caught a real issue before release.
Show answer
Situation: a new checkout redesign was ready for release. Task: I had just added an axe scan to our Playwright smoke tests. Action: the scan flagged that the payment form inputs had placeholder text but no labels, and a keyboard test showed the pay button was unreachable with Tab. I raised it with screenshots and the rule links. Result: the developer fixed both in a day and the release went out on time.
26
How do you attach a screenshot or log to the report from inside a test?
Show answer
test('report', async ({ page }, testInfo) => {
await page.goto('/reports');
await testInfo.attach('report page', {
body: await page.screenshot(),
contentType: 'image/png',
});
await testInfo.attach('meta', { body: 'build 42', contentType: 'text/plain' });
});
27
How do you perform drag and drop and hover?
Show answer
locator.hover() and locator.dragTo(target) perform these actions, with auto-waiting for actionability.
28
When should you avoid mocking, and how do you balance mocked and real tests?
Show answer
Avoid mocking in a small set of critical end-to-end journeys, such as signup, payment and checkout, where integration matters most. Use mocks for UI states, error handling and third-party services. Back the mocks with API contract tests so they match reality. A healthy split is many fast mocked component-level tests and a thin layer of full-stack tests.
29
How do you share cookies between API login and UI?
Show answer
Log in with request.post, call request.storageState(), and create a browser context using that state.
30
How do you locate elements inside a specific row or card?
Show answer
Chain locators: find the container first, then search inside it. Example: page.getByRole('row', { name: 'INV-104' }).getByRole('button', { name: 'Download' }). Each step narrows the search area, so short names like Edit or Download stay unique. Chaining also documents intent clearly and avoids long CSS paths that break when markup changes.
31
How do you block images and fonts to speed up tests?
Show answer
await page.route(/\.(png|jpe?g|webp|woff2?)$/, route => route.abort());
// or by resource type
await page.route('**/*', route =>
route.request().resourceType() === 'image'
? route.abort()
: route.continue()
);
32
How do you open a trace file?
Show answer
Download trace.zip from the test results or CI artifact. Run npx playwright show-trace path/to/trace.zip to open it locally, or drag the file into trace.playwright.dev, which processes it in the browser without uploading it. In the HTML report, failed tests with a trace show a trace link you can click directly.
33
How do you run only smoke tests?
Show answer
Tag tests (in the title or with { tag: '@smoke' }) and run: npx playwright test --grep @smoke (use --grep-invert to exclude).
34
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.
35
How do you integrate Playwright with Allure or other reports?
Show answer
Install the allure-playwright reporter, add it in the config reporters array and generate the report from the allure-results folder in CI.
36
How do you read test data from a JSON file and loop over it?
Show answer
import users from './data/users.json';
for (const u of users) {
test(`login as ${u.role}`, async ({ page }) => {
await page.goto('/login');
await page.getByLabel('Email').fill(u.email);
await page.getByLabel('Password').fill(u.password);
await page.getByRole('button', { name: 'Sign in' }).click();
});
}
37
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.
38
How do you change part of a real API response?
Show answer
await page.route('**/api/profile', async route => {
const response = await route.fetch();
const json = await response.json();
json.plan = 'premium';
await route.fulfill({ response, json });
});
await page.goto('/account');
await expect(page.getByText('Premium plan')).toBeVisible();
39
In what order do hooks and fixtures run?
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.
40
The app polls a status endpoint every few seconds. How do you test the change from Pending to Done?
Show answer
Mock the endpoint with a counter: return Pending for the first two calls and Done after that. Then assert the UI shows Pending and later Done using web-first assertions with a suitable timeout. You can also use page.clock to speed up the polling interval instead of waiting real seconds. This makes a slow real-world process quick and deterministic.
Tips to crack the Fractal Analytics Playwright Testing interview
- Revise statistics, machine learning basics and SQL, and be ready to explain model choice and evaluation metrics.
- Practise analytics case questions for consumer goods or retail clients, such as forecasting or pricing.
- Read about Fractal's AI products and its focus on decision intelligence for company-related questions.
- Keep a one-minute story ready for every project on your CV: problem, your part, tools, result.
- Practise the hard questions on this page aloud; Fractal Analytics interviewers usually ask follow-ups on your first answer.
Frequently asked questions
How many rounds are there in the Fractal Analytics Playwright Testing interview?
Candidates usually go through 5 stages: Online assessment (aptitude + SQL + Python or statistics); Technical round 1; Technical round 2 or case round; Hiring manager round; HR round. The exact rounds change with the role, team, location and your experience, so confirm the process with the recruiter.
Which topics should I prepare for the Fractal Analytics Playwright Testing interview?
This practice set leans on Framework Design and CI/CD (7), Debugging and Trace Viewer (5), Visual & Accessibility Testing (5), Network Mocking (5). Revise those first, then practise explaining one or two of your own projects end to end, because most Fractal Analytics interviewers ask you to walk through real work.
Are these the exact questions asked at Fractal Analytics?
No. These are curated practice questions that match the skills and difficulty usually tested in analytics interviews like Fractal Analytics's. They are not a leaked or verified list of past questions.
Where does Fractal Analytics hire Playwright Testing professionals in India?
Fractal Analytics has large teams in Mumbai, Bengaluru, Gurugram, Pune. Openings and locations change often, so check the Fractal Analytics careers page and filter by city and experience.
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