01
How do you mock network requests?
Show answer
page.route('**/api/items', route => route.fulfill({ json: [...] })) intercepts and replies with test data; route.abort() simulates failures.
Kotak Mahindra Bank Playwright Testing Interview Questions & Answers
Curated interview practice questions with answers. These are practice scenarios, not a verified list of past interview questions.
About Kotak Mahindra Bank hiring for Playwright Testing roles
Kotak Mahindra Bank is a major Indian private sector bank offering retail banking, corporate banking, wealth management, credit cards and digital banking through products like Kotak 811. The wider Kotak group also includes securities, asset management and insurance businesses. It hires for relationship management, operations, risk, analytics and technology roles across its offices and branches.
For Playwright Testing roles, this Kotak Mahindra Bank practice set focuses most on API Testing (9), JavaScript and TypeScript (8), Network Mocking (4), Playwright Core (4). It has 3 easy, 34 medium, 3 hard questions, so you can start easy and work up to the harder ones.
- Company type
- Banking & finance
- Headquarters
- Mumbai, India
- Main India offices
- Mumbai, Bengaluru
Kotak Mahindra Bank Playwright Testing interview process
- Online assessment or resume screening
- Functional or technical interview
- Managerial round
- HR round
Typical pattern based on public candidate experiences. Rounds vary by role, team and year.
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02
How do you check that a product list on the page is sorted by price?
Show answer
const texts = await page.getByTestId('price').allTextContents();
const prices = texts.map(t => Number(t.replace(/[^0-9.]/g, '')));
const sorted = [...prices].sort((a, b) => a - b);
expect(prices).toEqual(sorted);
// wait for the list first with toHaveCount
03
What are Partial, Pick, Omit and Record used for?
Show answer
They are built-in utility types. Partial<User> makes all fields optional, handy for override objects in test data builders. Pick<User, 'id' | 'email'> keeps chosen fields, and Omit<User, 'password'> removes some. Record<Role, string> maps every key of a union to a value type, for example storing a credentials file path per role.
04
How do you change a mounted component's props during a test?
Show answer
Call component.update with new JSX, for example await component.update(<Badge count={5} />). Playwright re-renders the same instance with the new props, so internal state is kept, just like a parent re-rendering it in the app. This lets you test effects that react to prop changes. To test fresh mounting behaviour instead, unmount and mount again.
05
What are web-first assertions?
Show answer
Assertions like expect(locator).toBeVisible() that retry until they pass or time out, unlike one-off checks.
06
What is the difference between synchronous and asynchronous code?
Show answer
Synchronous code runs line by line and blocks; asynchronous code starts a task and continues, handling the result later with promises or await.
07
Tell me how you learned TypeScript quickly for a project.
Show answer
Situation: I joined a team whose Playwright suite was in TypeScript while I knew only basic JavaScript. Task: become productive in two weeks. Action: I studied types, interfaces and generics in the evenings, read the team's page objects, and fixed small compiler errors as practice. Result: by week three I was writing new tests and reviewing simple pull requests.
08
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.
09
Write a fixture that gives each parallel worker its own test account.
Show answer
import { test as base } from '@playwright/test';
export const test = base.extend<{}, { account: { email: string; password: string } }>({
account: [async ({}, use, workerInfo) => {
const i = workerInfo.parallelIndex;
await use({
email: `qa.user${i}@example.test`,
password: process.env.QA_PASSWORD!,
});
}, { scope: 'worker' }],
});
10
A third-party analytics script makes tests slow and flaky. What do you do?
Show answer
Block it in tests with context.route on its domain and route.abort, or fulfill it with an empty script. Analytics is not what you are testing, and blocking it removes delays and random network errors. If tracking events matter, write a few separate tests that capture the requests with waitForRequest and assert their parameters.
11
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.
12
Write a test that checks keyboard Tab order through a login form.
Show answer
test('login form is keyboard friendly', async ({ page }) => {
await page.goto('/login');
await page.getByLabel('Email').focus();
await page.keyboard.press('Tab');
await expect(page.getByLabel('Password')).toBeFocused();
await page.keyboard.press('Tab');
await expect(page.getByRole('button', { name: 'Sign in' })).toBeFocused();
await page.keyboard.press('Enter');
});
13
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.
14
What is the difference between click and dispatchEvent?
Show answer
click simulates a real user click with actionability checks; dispatchEvent fires a DOM event directly without those checks.
15
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);
});
16
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.
17
How do you test a dropdown component's keyboard support in a component test?
Show answer
Mount the dropdown, focus the trigger and press Enter or ArrowDown to open it. Assert the listbox is visible and the first option has aria-selected or focus. Press ArrowDown again and check the active option moves, then press Enter and assert the trigger shows the chosen value and the list is closed. Finally press Escape on an open list to confirm it closes without changing the value.
18
How do you combine reports from sharded CI jobs?
Show answer
Use the blob reporter in each shard job, upload each blob-report folder as an artifact, then in a final job download them all into one folder and run npx playwright merge-reports --reporter html ./all-blob-reports. This gives one HTML report for the whole run instead of one per shard, which makes reviewing failures much easier.
19
What does outputDir contain and why does it matter in parallel runs?
Show answer
outputDir, test-results by default, holds per-test artifacts such as screenshots, videos and traces. Playwright creates a separate subfolder for each test and retry, so parallel workers do not overwrite each other's files. testInfo.outputPath gives you a safe path inside it for your own files. It is cleared at the start of every run, so do not store anything permanent there.
20
What is hoisting?
Show answer
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.
21
How do you test a page in dark mode or with reduced motion?
Show answer
Set colorScheme: 'dark' or reducedMotion: 'reduce' in the context options or test.use. You can also switch during a test with page.emulateMedia({ colorScheme: 'dark' }). Then assert the right styles or take a screenshot comparison. Reduced motion also helps stability, because many apps skip animations when that preference is set.
22
How can service workers interfere with network mocking?
Show answer
If the app registers a service worker, it may answer requests from its own cache, so page.route never sees them and mocks seem ignored. Set serviceWorkers: 'block' in the context or config options to turn them off when mocking. If you specifically test offline or PWA caching, keep them enabled and test that behaviour separately.
23
How do you mock an API response?
Show answer
await page.route('**/api/users', route =>
route.fulfill({ status: 200, json: [{ id: 1, name: 'Test' }] })
);
24
Write an accessibility scan that checks only WCAG 2.1 A and AA rules.
Show answer
import { test, expect } from '@playwright/test';
import AxeBuilder from '@axe-core/playwright';
test('signup page has no WCAG A/AA issues', async ({ page }) => {
await page.goto('/signup');
const results = await new AxeBuilder({ page })
.withTags(['wcag2a', 'wcag2aa', 'wcag21a', 'wcag21aa'])
.analyze();
expect(results.violations).toEqual([]);
});
25
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.
26
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.
27
What are union types and type narrowing in TypeScript?
Show answer
A union type allows several types, such as string | number or 'admin' | 'user'. Before using type-specific methods, you narrow the type with checks like typeof, instanceof, in or comparing a literal field. TypeScript then knows the exact type inside that branch. In tests, unions model options like a role parameter that accepts only known values.
28
What is the difference between null and undefined?
Show answer
undefined means a variable has not been assigned; null is an intentional empty value.
29
How do you validate response headers?
Show answer
Use response.headers() for an object of lower-cased header names, or headersArray() for duplicates. Assert content-type contains application/json, cache-control matches the policy, and security headers such as strict-transport-security are present. Also check that sensitive headers like server version are not exposed. Header checks catch configuration bugs that body checks miss.
30
How do you work with iframes?
Show answer
const frame = page.frameLocator('#payment-frame');
await frame.getByLabel('Card number').fill('4111 1111 1111 1111');
31
How do you tag and filter tests?
Show answer
Add tags in the title (@smoke) or use the tag option, and run with --grep @smoke or --grep-invert.
32
Write a test that deletes a record and confirms it is gone.
Show answer
test('delete product', async ({ request }) => {
const created = await request.post('/api/products', { data: { name: 'Temp' } });
const { id } = await created.json();
const del = await request.delete(`/api/products/${id}`);
expect(del.status()).toBe(204);
const get = await request.get(`/api/products/${id}`);
expect(get.status()).toBe(404);
});
33
How do you run tests on mobile viewports?
Show answer
Use device descriptors such as devices['iPhone 13'] in a project config to emulate viewport, user agent and touch.
34
CI runners have 2 CPU cores and workers is set to 8. Tests start timing out randomly. Why?
Show answer
Eight browsers compete for two cores and limited memory, so pages render slowly, actions hit timeouts and the app under test may also be overloaded. More workers than cores rarely helps. Set workers to match the runner, such as 2, and scale out with shards on more machines instead. Watch CPU and memory metrics in CI to confirm.
35
How do you test how the UI handles a 500 error from the orders API?
Show answer
Mock the endpoint with route.fulfill({ status: 500, json: { message: 'Server error' } }), then open the page. Assert the user sees a friendly error message and a retry button, and that no broken half-rendered table appears. Then make the retry return 200 and check the data loads. This covers a path that is hard to trigger on a real server.
36
How do you keep test code, page objects and utilities organised as a repository grows?
Show answer
Use a clear layout: tests grouped by feature, a pages folder for page objects, a fixtures folder that exposes them, and api and data folders for helpers and builders. Add path aliases in tsconfig, a lint config with the Playwright plugin, and a short contributing guide. Review new helpers in pull requests so duplicate utilities do not spread.
37
How do you write data-driven API tests with many inputs?
Show answer
const cases = [
{ email: '', status: 400 },
{ email: 'bad', status: 400 },
{ email: 'ok@test.in', status: 201 },
];
for (const c of cases) {
test(`signup with '${c.email}'`, async ({ request }) => {
const res = await request.post('/api/signup', { data: { email: c.email } });
expect(res.status()).toBe(c.status);
});
}
38
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.
39
Component tests render without any styling. What is missing?
Show answer
Global CSS, CSS variables and fonts are normally loaded by the app's entry file, which component tests do not use. Import them in playwright/index.tsx so they are part of the test bundle. If the styling comes from a provider, such as a theme or CSS-in-JS setup, wrap the app in beforeMount. Without this, visibility and layout checks may give misleading results.
40
What is the difference between beforeEach and fixtures?
Show answer
beforeEach runs the same code before every test in scope; fixtures are lazy, composable and only set up what a test uses.
Tips to crack the Kotak Mahindra Bank Playwright Testing interview
- Revise banking basics such as types of accounts, loans, interest rates, KYC and the role of the RBI.
- For technology and analytics roles, prepare SQL, Excel and one programming language, with examples from your projects.
- Read about Kotak's digital banking efforts like Kotak 811 and recent banking news to discuss them in interviews.
- 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; Kotak Mahindra Bank interviewers usually ask follow-ups on your first answer.
Frequently asked questions
How many rounds are there in the Kotak Mahindra Bank Playwright Testing interview?
Candidates usually go through 4 stages: Online assessment or resume screening; Functional or technical interview; Managerial 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 Kotak Mahindra Bank Playwright Testing interview?
This practice set leans on API Testing (9), JavaScript and TypeScript (8), Network Mocking (4), Playwright Core (4). Revise those first, then practise explaining one or two of your own projects end to end, because most Kotak Mahindra Bank interviewers ask you to walk through real work.
Are these the exact questions asked at Kotak Mahindra Bank?
No. These are curated practice questions that match the skills and difficulty usually tested in banking & finance interviews like Kotak Mahindra Bank's. They are not a leaked or verified list of past questions.
Where does Kotak Mahindra Bank hire Playwright Testing professionals in India?
Kotak Mahindra Bank has large teams in Mumbai, Bengaluru. Openings and locations change often, so check the Kotak Mahindra Bank careers page and filter by city and experience.
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