Playwright Testing Interview Questions for Junior Roles (₹4–6 LPA)

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

List, dot, line, HTML, JSON and JUnit reporters, plus integrations such as Allure, configurable per environment.

It records screenshots, DOM snapshots, network calls and actions per step so you can replay a failed run and see exactly what happened.

undefined means a variable has not been assigned; null is an intentional empty value.

Turn on trace: 'on-first-retry', open the trace viewer, check network and timing, replace hard waits with web-first assertions, isolate test data and check for sharding conflicts.

Define projects for chromium, firefox and webkit in playwright.config.ts, set workers, then run: npx playwright test

Capture the download event, save it with download.saveAs, then read the file in Node and assert on name, size or content.

Rely on auto-waiting plus a web-first assertion on the final state, disable animations in config for tests and avoid fixed timeouts.

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

Separate tests, page objects, fixtures, utilities, test data and config; use tags, projects, shared auth setup, linting, code review and a CI pipeline with sharding and reports.

Register page.on('dialog', d => d.accept()) before the action triggers the dialog.

Use dotenv files per environment, read them in playwright.config and set baseURL and credentials from variables, selecting with an ENV flag.

obj?.a?.b safely reads nested properties and returns undefined instead of throwing if something in the chain is missing.

test.step groups actions into named steps in reports; annotations such as test.skip, test.fixme and test.slow communicate intent and adjust behaviour.

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.

Fetch tokens in a fixture with expiry tracking and refresh it when it is about to expire, keeping tests unaware of the details.

Tag tests (in the title or with { tag: '@smoke' }) and run: npx playwright test --grep @smoke (use --grep-invert to exclude).

Use the official Playwright image which contains browsers and dependencies, mount the project and run npx playwright test for consistent CI environments.

Set retries in the config or CLI and failed tests re-run in a fresh context, with trace recorded on first retry to diagnose flakiness.

Log in with request.post, call request.storageState(), and create a browser context using that state.

Placeholders for types that make reusable code type-safe, for example a helper function returning the same type of item that it receives.

beforeEach runs the same code before every test in scope; fixtures are lazy, composable and only set up what a test uses.

A type alias describes a shape or union of values; an enum creates a named set of constants that exists at runtime.

In a fixture or beforeEach, call the API (request.post) to create the user or order, use it in the UI test, then delete it in teardown. It is faster and more reliable than creating data through the UI.

Before acting, Playwright waits for the element to be attached, visible, stable, enabled and able to receive events — so manual waits are rarely needed.

all waits for every promise and rejects on the first failure; allSettled waits for all and reports each outcome; race settles with the first one to finish.

map transforms each item, filter keeps items that match a condition, and reduce combines all items into a single value.

Workflow: checkout → setup-node → npm ci → npx playwright install --with-deps → npx playwright test → upload playwright-report as an artifact.

await expect(page).toHaveScreenshot('home.png') compares against a baseline image; tune maxDiffPixels and mask dynamic areas like dates.

npx playwright codegen records user actions and generates test code with suggested locators, handy for starting tests.

An open-source end-to-end testing framework from Microsoft that automates Chromium, Firefox and WebKit through one API, in multiple languages.

Use --debug or the Inspector, page.pause(), UI mode, the trace viewer and headed runs with slowMo.

locator.hover() and locator.dragTo(target) perform these actions, with auto-waiting for actionability.

Declarations of var and functions are moved to the top of their scope at compile time; let and const are hoisted but stay in the temporal dead zone until declared.

Wait for the popup event with const [popup] = await Promise.all([page.waitForEvent('popup'), page.click('a')]), then interact with popup.

A function that remembers variables from its outer scope even after that scope has finished. They are used for private state and factory helpers.

Assertions like expect(locator).toBeVisible() that retry until they pass or time out, unlike one-off checks.

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

Use a library such as zod or ajv to define the expected schema and parse the response to fail on missing or wrongly typed fields.

Define an interface for the payload, cast or validate the parsed JSON to it (for example with zod), and use that type in assertions to catch shape changes.

Cover happy path, validation errors, auth and permissions, boundary values, idempotency, schema, performance and data cleanup.

Use device descriptors such as devices['iPhone 13'] in a project config to emulate viewport, user agent and touch.

POST the query and variables as JSON to the single endpoint and assert both data and errors fields in the response.

API testing checks services directly and is fast and stable; UI testing checks the full user experience in the browser and is slower.

A class receives page in its constructor, stores locators as properties and exposes actions like login(user, pass). Tests call page objects, not raw locators.

const [download] = await Promise.all([ page.waitForEvent('download'), page.getByText('Export').click(), ]); await download.saveAs('reports/file.csv');

Create a class that takes a page, defines locators as properties and exposes action methods; instantiate it in a fixture for clean tests.

Use environment variables or .env files, a baseURL in config, API calls for setup and cleanup, and unique data per run.

npm is the Node package manager. package.json lists the project's dependencies and scripts, such as the command that runs the tests.

Set them in the context options (geolocation, permissions, timezoneId, locale) to simulate users from other regions.

await request.post('/api/users', { data: { name: 'Asha' } }) automatically sets JSON headers and serialises the payload.

Playwright locators pierce open shadow roots by default, so getByRole and CSS locators work without special handling.