01
How do you handle iframes?
Show answer
switchTo().frame(index, name or element) enters the frame, and switchTo().defaultContent() returns to the main page.
Red Hat Automation Testing Interview Questions & Answers
Curated interview practice questions with answers. These are practice scenarios, not a verified list of past interview questions.
About Red Hat hiring for Automation Testing roles
Red Hat is an open source software company, now part of IBM, known for Red Hat Enterprise Linux, OpenShift and Ansible. It provides enterprise Linux, hybrid cloud, container and automation platforms with subscription-based support. In India it has a large presence in Pune and Bengaluru, hiring software engineers, quality engineers, support engineers and consultants.
For Automation Testing roles, this Red Hat practice set focuses most on Selenium WebDriver (8), Git, Maven and Jenkins (6), API Testing and CI/CD (5), Selenium Grid & Docker (4). It has 28 medium, 12 hard questions, so you can start easy and work up to the harder ones.
- Company type
- Product
- Headquarters
- Raleigh, North Carolina, USA
- Main India offices
- Pune, Bengaluru
Red Hat Automation Testing interview process
- Online assessment or resume screening
- Technical round 1 (Linux + programming)
- Technical round 2 (domain or open source)
- Hiring manager and HR round
Typical pattern based on public candidate experiences. Rounds vary by role, team and year.
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02
What is the difference between git merge and git rebase?
Show answer
Merge combines branches by creating a merge commit, keeping the full history exactly as it happened. Rebase replays your commits on top of another branch, producing a straight, linear history without a merge commit. Rebase is good for tidying a local feature branch before a pull request; never rebase commits that others have already pulled, because it rewrites history.
03
File upload tests pass locally but fail when they run on a remote Grid. Why?
Show answer
sendKeys with a file path sends a path that exists on your test machine, but the browser runs on the remote node where that path does not exist. Set a LocalFileDetector on the RemoteWebDriver, using ((RemoteWebDriver) driver).setFileDetector(new LocalFileDetector()), so Selenium zips and transfers the file to the node first. Alternatively mount the test data folder into the node container. Always use absolute paths.
04
What are the standalone, hub and node, and distributed modes of Selenium Grid 4?
Show answer
Standalone runs every Grid component and a local node in a single process, which suits a laptop or a single container. Hub and node mode runs the router, distributor, queue and session map together as the hub, with separate node processes registering to it, which is the usual team setup. Fully distributed mode runs each component separately, often on Kubernetes, for very large grids that need independent scaling and high availability.
05
Should page objects use inheritance or composition?
Show answer
Use a shallow inheritance only for a BasePage with common helpers. For shared UI parts, use composition: a page has a Header, a SideMenu and a Table component. Deep inheritance like BasePage to ListPage to ProductListPage to SaleProductListPage becomes fragile and hard to debug. Composition mirrors how modern UIs are built from components and keeps classes small.
06
What is a Maven multi-module project and when would you use it for automation?
Show answer
A parent pom lists modules that share dependency versions through dependencyManagement and plugins through pluginManagement. In automation you might have core-framework, ui-tests, api-tests and performance modules. Teams can run or release modules separately, and shared code lives in one place. It is worth it when several teams or test types share the same framework.
07
A mobile test fails intermittently because an animation is still running when you tap. How do you fix it?
Show answer
Wait for a stable end state instead of sleeping, for example wait until the target element is visible and enabled or until a spinner disappears. On test devices and emulators you can disable animations with adb shell settings put global window_animation_scale 0, along with the transition and animator scales. Ask developers for an idle indicator if needed. Disabling animations makes tests faster and more stable, but keep one manual check of the real animations.
08
How do you test an API that supports multiple versions at the same time?
Show answer
First learn how versions are selected: URL path like /v1 and /v2, a header, or a query parameter. Keep a request specification per version and run the shared contract tests against each supported version, plus version-specific tests for new fields or changed behaviour. Check that old versions still return their original response shape so existing clients do not break, and that deprecated versions send the agreed deprecation headers or errors.
09
Your 200 mobile tests across six devices take too long to finish. How would you speed them up?
Show answer
Run devices in parallel with one thread per device, each with its own udid, systemPort or wdaLocalPort. Use deep links or API calls to reach the screen under test instead of navigating through the UI every time. Prefer noReset with explicit data cleanup over reinstalling the app. Replace XPath with accessibility ids. Split the suite so pull requests run a small smoke set on emulators while the full device matrix runs nightly.
10
How do you run Selenium tests in Docker containers in CI?
Show answer
Use official Selenium images, either standalone-chrome for simple runs or a Grid with hub and node containers via Docker Compose. The test container or Jenkins agent points RemoteWebDriver to http://selenium-hub:4444. Containers give the same browser version everywhere and are cleaned after each run. Add shm_size for Chrome stability and record videos for failed tests if needed.
11
Tests pass on QA but fail in the staging pipeline. How do you investigate?
Show answer
Compare what differs: configuration URLs, test data, feature flags, user permissions, network or proxy, browser versions and timing due to slower servers. Check logs and screenshots from staging and rerun one failing test with verbose logging. Often the issue is missing data or a flag. Fix by making environment settings explicit and creating required data in test setup.
12
JMeter runs out of memory during a large load test. What do you do?
Show answer
First remove or disable GUI listeners like View Results Tree and run in non-GUI mode. Save results in CSV format with only needed fields instead of XML with response data. Increase heap through the HEAP environment variable, such as -Xms2g -Xmx4g, within the machine's RAM. Use Groovy instead of BeanShell, avoid huge regex extractions, and if one machine still cannot generate the load, distribute it across several workers.
13
Developers changed a field from a number to a string and your tests did not catch it. How do you prevent this?
Show answer
Add JSON schema validation for key responses so type changes fail immediately, and deserialize into typed POJOs, which fail when types do not match. For services with multiple consumers, introduce contract tests so providers learn about breaks before deploying. Also ask for API changes to be shared in pull requests or a changelog that QA reviews.
14
How do you decide what to automate?
Show answer
Automate stable, repetitive, high-risk and data-heavy flows (smoke, regression). Skip one-time tests, frequently changing UI and checks needing human judgement. Compare run frequency × manual time with build and maintenance cost.
15
Tell me about a time you had to explain a technical test failure to a non-technical manager.
Show answer
Situation: a release was blocked by failing tests and the manager wanted to know if it was safe to ship. Task: explain the risk without jargon. Action: I separated the failures into one real bug, where customers could be charged twice, and three environment issues. I showed the bug with a short screen recording. Result: the manager delayed the release by one day, the bug was fixed and the environment issues were assigned to DevOps.
16
How do you test a responsive page in a mobile viewport using Selenium?
Show answer
For layout checks you can set the window size, like driver.manage().window().setSize(new Dimension(390, 844)). For closer emulation in Chrome use mobile emulation in ChromeOptions: options.setExperimentalOption("mobileEmulation", Map.of("deviceName", "Pixel 7")), which also sets the user agent, pixel ratio and touch events. This catches responsive layout bugs quickly, but it is not a replacement for testing on real mobile browsers.
17
What is git cherry-pick?
Show answer
git cherry-pick <commit> applies the changes of one specific commit onto your current branch, creating a new commit. It is useful when a fix on one branch, such as a locator fix on develop, is urgently needed on a release branch without merging everything else. Overuse creates duplicate commits and confusing history, so prefer normal merges when possible.
18
Write Selenium code to verify that all links on a page are not broken.
Show answer
List<WebElement> links = driver.findElements(By.tagName("a"));
for (WebElement link : links) {
String url = link.getAttribute("href");
if (url == null || !url.startsWith("http")) continue;
HttpURLConnection con = (HttpURLConnection) new URL(url).openConnection();
con.setRequestMethod("HEAD");
int code = con.getResponseCode();
if (code >= 400) System.out.println("Broken: " + url + " " + code);
}
19
How do you get reports, screenshots and downloaded files out of a Docker container?
Show answer
Use volumes. A bind mount maps a host folder into the container, for example -v $(pwd)/target:/app/target, so reports written in the container appear on the CI agent for archiving. Named volumes are managed by Docker and suit data that should survive restarts. For browser downloads, mount the node's download folder or enable the Grid's managed downloads with the se:downloadsEnabled capability to fetch files through the Grid API.
20
A click works locally but throws ElementClickInterceptedException in CI. How do you fix it?
Show answer
Another element, such as a cookie banner, loader overlay or sticky header, covers the target. In CI the window is often smaller, so the layout differs. Set a fixed window size, wait for the overlay to disappear with invisibilityOfElementLocated, close banners in setup and scroll the element into view. Use a JavaScript click only as a last resort, since it bypasses real user behaviour.
21
How do you integrate Selenium tests with Jenkins?
Show answer
Create a job or pipeline that checks out code, runs mvn test, publishes reports and triggers on commits or schedules.
22
You join a project where tests call driver.findElement directly everywhere. How do you move to POM?
Show answer
I would not rewrite everything at once. First create the base structure: DriverManager, BasePage and config. Then pick the most-used flows, such as login and navigation, create page objects for them and migrate tests touching those pages. Agree that new tests must use POM, and migrate old tests when they are next changed. Track progress so the team sees improvement in maintenance time.
23
A dropdown option list loads only after typing three letters. How do you automate selecting a value?
Show answer
Type the text with sendKeys, wait for the suggestion list with visibilityOfAllElementsLocatedBy, then find the option whose text matches the required value and click it. Avoid selecting by index because suggestion order may change. If the list is virtualised, type more characters to narrow results. Verify the selected value in the input afterwards.
24
What is a DataProvider in TestNG?
Show answer
@DataProvider returns Object[][]; a @Test(dataProvider = "name") method runs once per row — the basis of data-driven tests, often reading Excel or JSON.
25
What is the difference between Comparable and Comparator in Java?
Show answer
Comparable defines the natural order inside the class (compareTo); Comparator defines custom orders externally (compare), useful for sorting test data in several ways.
26
What are access modifiers in Java?
Show answer
public (everywhere), protected (package and subclasses), default (package) and private (same class), used to control visibility of test utilities.
27
How do you test an API that returns paginated results?
Show answer
Call the first page, check page size, total count and the next link or cursor. Loop through pages until there is no next page, collecting IDs, then assert no duplicates and the total matches the reported count. Also test edge cases: page 0, a page beyond the last, invalid page size and sorting stability. Cap the loop to avoid endless runs if the API misbehaves.
28
How do you handle dynamic elements whose ids change?
Show answer
Use CSS or XPath with contains(), starts-with() or stable attributes, relative axes, or data-test attributes agreed with developers.
29
Your API tests started failing with SSL handshake errors on a new test server. What do you do?
Show answer
First confirm the server uses a self-signed or internal certificate. The proper fix is to import the company CA certificate into a truststore and configure REST Assured with trustStore(path, password). As a temporary measure in a test environment only, relaxedHTTPSValidation() skips checks. Never use relaxed validation against production, and raise the certificate issue with the infra team.
30
How do you manage test environments for a CI pipeline?
Show answer
Keep environment details in config files or environment variables per env, never in code. Prefer ephemeral environments created per pull request with containers, seeded with known data and destroyed afterwards. For shared environments, reserve them through the pipeline, reset data before runs and monitor health with a pre-test check so tests do not fail due to a down service.
31
How do you handle a browser basic authentication pop-up in Selenium?
Show answer
The basic auth dialog is not part of the page, so findElement cannot reach it. The simplest way is putting credentials in the URL, like https://user:pass@site.test, which works in many browsers. In Selenium 4 with Chromium you can register credentials through the HasAuthentication interface: ((HasAuthentication) driver).register(UsernameAndPassword.of("user", "pass")). Keep the credentials in environment variables or a secret store, never in code.
32
Write a declarative Jenkinsfile that runs Maven tests and publishes results.
Show answer
pipeline {
agent any
parameters { choice(name: 'SUITE', choices: ['smoke', 'regression']) }
stages {
stage('Checkout') { steps { checkout scm } }
stage('Test') {
steps { sh "mvn clean test -DsuiteXml=${params.SUITE}.xml" }
}
}
post {
always {
junit 'target/surefire-reports/*.xml'
archiveArtifacts artifacts: 'target/screenshots/**', allowEmptyArchive: true
}
}
}
33
What is OAuth 2.0 in API testing?
Show answer
An authorisation framework where a client obtains an access token from an auth server and sends it as a Bearer token; tests fetch and reuse the token in setup.
34
Which reporting tools do you use?
Show answer
TestNG reports, ExtentReports and Allure give charts, screenshots and logs that are easy to share with the team.
35
Nightly Jenkins regression runs take 4 hours. How would you bring it down?
Show answer
Measure first: find the slowest tests and setup steps. Then run tests in parallel across Grid nodes or containers, replace UI setup with API calls, remove duplicate coverage, move checks down to API level, split the suite into shards across agents, and cache Maven dependencies. Aim for a smoke stage under 15 minutes on every commit and a parallel regression under an hour.
36
How do you switch between windows and tabs?
Show answer
Get getWindowHandles(), loop to find the target, and call driver.switchTo().window(handle); switch back using the stored parent handle.
37
How do you run Appium tests in parallel on several Android devices?
Show answer
Give each device its own session: unique appium:udid, a separate appium:systemPort for UiAutomator2 and, for hybrid apps, a separate chromedriverPort. Store the driver in a ThreadLocal so threads never share it. Pass device details through TestNG parameters or a DataProvider and run with parallel="tests", one test tag per device. One Appium server can handle several sessions, or use a Selenium Grid 4 with Appium nodes or a cloud device farm for larger matrices.
38
What is the New Session Queue in Selenium Grid 4 and what happens when all slots are busy?
Show answer
When a test requests a session and no node slot matches, the request waits in the New Session Queue instead of failing immediately. The distributor picks it up when a matching slot frees. If it waits longer than the session request timeout, which is 300 seconds by default, the client gets a SessionNotCreatedException. Tuning this timeout and matching thread count to slot count prevents long waits and timeouts in CI.
39
How does HashMap work internally?
Show answer
It uses the key's hashCode to find a bucket and equals to resolve collisions, giving O(1) average lookups; Java 8 converts long buckets into trees.
40
How do you handle test data cleanup in Cucumber scenarios?
Show answer
Create data in Given steps through APIs, record the created IDs in the scenario context, and delete them in an @After hook, which runs even when the scenario fails. Use unique names with a timestamp or UUID to avoid clashes in parallel runs. For shared environments, add a nightly cleanup job for leftover data tagged with a test prefix.
Tips to crack the Red Hat Automation Testing interview
- Get comfortable with Linux commands, shell scripting, processes, permissions and networking, which are central to many Red Hat roles.
- Contribute to an open source project or show GitHub work, since Red Hat values public collaboration and community involvement.
- Learn the basics of containers, Kubernetes and Ansible, and consider Red Hat certifications such as RHCSA for support roles.
- 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; Red Hat interviewers usually ask follow-ups on your first answer.
Frequently asked questions
How many rounds are there in the Red Hat Automation Testing interview?
Candidates usually go through 4 stages: Online assessment or resume screening; Technical round 1 (Linux + programming); Technical round 2 (domain or open source); Hiring manager and 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 Red Hat Automation Testing interview?
This practice set leans on Selenium WebDriver (8), Git, Maven and Jenkins (6), API Testing and CI/CD (5), Selenium Grid & Docker (4). Revise those first, then practise explaining one or two of your own projects end to end, because most Red Hat interviewers ask you to walk through real work.
Are these the exact questions asked at Red Hat?
No. These are curated practice questions that match the skills and difficulty usually tested in product interviews like Red Hat's. They are not a leaked or verified list of past questions.
Where does Red Hat hire Automation Testing professionals in India?
Red Hat has large teams in Pune, Bengaluru. Openings and locations change often, so check the Red Hat careers page and filter by city and experience.
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