Curated interview practice questions with answers. These are practice scenarios, not a verified list of past interview questions.
About EXL hiring for Automation Testing roles
EXL is a data analytics and digital operations company serving insurance, healthcare, banking and other industries. Its analytics teams build models for risk, marketing, collections and claims. In India it hires for business analysts, data analysts, data scientists and operations roles, many of them in insurance and banking analytics.
For Automation Testing roles, this EXL practice set focuses most on Selenium Grid & Docker (6), Git, Maven and Jenkins (5), REST Assured (5), TestNG Framework (4). It has 5 easy, 32 medium, 3 hard questions, so you can start easy and work up to the harder ones.
Company type
Analytics
Headquarters
New York, USA
Main India offices
Noida, Gurugram, Bengaluru, Pune
EXL Automation Testing interview process
Online assessment (aptitude + SQL or analytics)
Technical interview
Case or guesstimate round
HR round
Typical pattern based on public candidate experiences. Rounds vary by role, team and year.
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01
What are generics in Java and how do they help in a test framework?
Generics let classes and methods work with a type parameter while keeping compile-time type safety, such as List<String> or a method <T> T readJson(String path, Class<T> type). In a framework they let you write one reusable helper for many types, for example a generic API client that deserializes responses into any POJO, or a BasePage method that returns the correct page type for chaining. They remove casts and catch type errors at compile time.
02
Your Jenkins test stage marks the build green even though tests failed. Why?
Possibly testFailureIgnore is set to true in Surefire, the shell step uses || true, or the script swallows Maven's exit code. Sometimes tests catch exceptions and never fail. Check the console log for Maven's BUILD result and Surefire summary. Fix the configuration so failures produce a non-zero exit, or use junit publishing to mark the build unstable when tests fail.
@DataProvider returns Object[][]; a @Test(dataProvider = "name") method runs once per row — the basis of data-driven tests, often reading Excel or JSON.
04
Tests running inside Docker cannot reach the application running on the host's localhost. Why, and how do you fix it?
Inside a container, localhost means the container itself, not the host machine. On Docker Desktop use host.docker.internal as the host name. On Linux add extra_hosts with host.docker.internal:host-gateway, or use the host's IP. A cleaner option is running the application in the same Compose network and calling it by its service name, such as http://web:8080. Make sure the app listens on 0.0.0.0, not only 127.0.0.1.
05
Write Java code to find duplicate elements in a list.
When a build is killed, driver.quit() never runs, so sessions stay open until the node notices. Set a sensible session timeout on nodes, such as SE_NODE_SESSION_TIMEOUT of 300 seconds, so idle sessions are cleaned up. Always call quit in an @AfterMethod with alwaysRun or a finally block. In CI, bring the Compose Grid up per build and tear it down in a post always step, so each build gets a fresh Grid.
Filters intercept requests and responses, similar to middleware. They implement the Filter interface and can add headers, refresh tokens, log traffic, or attach request and response details to Allure reports with AllureRestAssured. You add them with given().filter(myFilter) or globally in a RequestSpecification. Filters keep cross-cutting concerns out of individual tests.
Add the json-schema-validator dependency, place the schema file in src/test/resources, and assert with then().body(matchesJsonSchemaInClasspath("user-schema.json")). Schema validation checks field types, required fields and structure, so it catches contract changes that value checks might miss. It complements, not replaces, assertions on business values like status or totals.
12
Write a REST Assured test using RequestSpecBuilder and ResponseSpecBuilder.
Add the selenium/video image as a sidecar container next to each node, sharing the node's display through DISPLAY_CONTAINER_NAME, and mount a folder for the mp4 files. Newer Grid versions also support recording per session by setting the se:recordVideo capability with Dynamic Grid. Name videos with se:name so they match test names. Keep videos only for failed tests or for a few days, because they use a lot of disk space.
15
Write a Dockerfile that runs a Maven and TestNG test suite.
Pass system properties on the command line, for example mvn test -Dbrowser=firefox -Denv=qa. Read them in Java with System.getProperty("browser", "chrome"), giving a default. Surefire forwards -D properties to the forked test JVM, or you can declare them under systemPropertyVariables. Jenkins can expose these as build parameters so testers choose browser and environment per run.
IAnnotationTransformer is a listener that changes @Test annotations at runtime before tests run. A common use is attaching a retry analyzer to every test automatically instead of adding retryAnalyzer to each method, or enabling and disabling tests from configuration. It must be registered in testng.xml or via service loader, not with the @Listeners annotation.
18
Your framework throws NullPointerException in a page object on the first action. What are the likely causes?
The driver was never initialised or was passed as null, for example a page created before setup ran or a static driver not yet assigned. With PageFactory, initElements may not have been called, so @FindBy fields are null. A config value read from a properties file may also be missing. Check the stack trace line, then fix the setup order and add null checks with clear messages.
19
What is a DataTable in Cucumber and how do you use it?
A DataTable passes a table written under a step into the step definition. You can read it as List<String>, List<Map<String,String>>, Map<String,String> or convert rows into objects with a @DataTableType method. For example a step that creates several users can take a table of name, role and email. Unlike Scenario Outline, a DataTable feeds data into one step and the scenario runs once.
20
You configured 50 parallel threads but only 8 tests run at a time on the Grid. Why?
The Grid only has 8 free slots, so the other requests wait in the New Session Queue. Total parallelism equals nodes multiplied by max sessions per node, not the TestNG thread count. Check the Grid UI for slot count. To run more, scale the node containers, raise max sessions if hardware allows, or use a larger grid. Otherwise reduce threads to match slots so waiting requests do not time out.
21
How do you make WebDriver thread-safe for parallel runs?
Continuous Integration builds and tests every commit, and Continuous Delivery ships automatically. Automated tests give fast feedback and gate releases.
25
Write Appium Java code to perform a vertical swipe using W3C Actions.
Profiles are sets of configuration activated by name, such as -Pqa or -Pstaging, or by conditions. In automation they switch environment URLs, suite files, browsers or parallel settings without changing code. For example a regression profile sets suiteXml to regression.xml and threadCount to 4. Combined with properties files, profiles keep one codebase for every environment.
27
What branching strategy do you use for test automation code?
Most teams use trunk-based development or a light GitHub Flow: short-lived feature branches from main, a pull request with review and a CI run, then merge. Long-lived branches cause painful conflicts. Keep automation code in the same repository as the app when possible so tests change together with features, or tag test versions to match app releases.
28
How do you validate a JSON response in REST Assured?
Use POJOs with a builder pattern or Lombok @Builder, so tests write User.builder().name("Ravi").role("QA").build(). For quick cases use a HashMap or Jackson ObjectNode. For large templates, keep a JSON file and change fields with a JSON library. Combine with a faker library for unique values. This avoids escaping issues and makes changes to the schema easy to update.
Make the outcome explicit with separate methods instead of one method guessing. For example loginAs(user) returns DashboardPage for valid credentials, while loginExpectingError(user) returns the same LoginPage so the test can check the error. Each method waits for its expected page and fails clearly if it does not appear. This keeps tests readable and avoids returning a generic Object or checking types in tests.
The script is probably replaying hard-coded dynamic values, such as a CSRF token, session cookie or auth header captured during recording. The server rejects them because they belong to the old session. Add an HTTP Cookie Manager so cookies are handled per thread, extract the CSRF or bearer token from the login response with an extractor, and replace the recorded value with the variable. Verify with View Results Tree on one thread.
34
How do you test that a method throws an expected exception in TestNG?
Use @Test(expectedExceptions = IllegalArgumentException.class) and optionally expectedExceptionsMessageRegExp to check the message. The test passes only if that exception is thrown. For more control, use Assert.assertThrows(IllegalArgumentException.class, () -> service.withdraw(-5)), which returns the exception so you can inspect it further. This style is clearer because the check applies to one line, not the whole test.
35
Tell me about a time you introduced BDD to a team. How did it go?
Situation: requirements were often misread, causing rework late in sprints. Task: I proposed BDD for one module. Action: I ran short three-amigos sessions, wrote example scenarios with the BA, automated them with Cucumber and showed them in sprint review. Result: rework on that module dropped noticeably over two sprints, and the team adopted the practice for other complex stories.
36
What is the difference between the normal, eager and none page load strategies in Selenium?
Page load strategy decides when navigation commands like get() return. Normal, the default, waits for the full load event including images and stylesheets. Eager returns when the DOM is ready (DOMContentLoaded), which speeds up heavy pages. None returns immediately after the initial response. With eager or none you must rely on explicit waits for the elements you need. Set it through options.setPageLoadStrategy(PageLoadStrategy.EAGER).
37
Tell me about a time you moved from web automation to mobile automation.
Situation: my team needed Android regression tests and I only knew Selenium. Task: deliver a smoke suite in one month. Action: I learned Appium 2 setup, used Appium Inspector to find locators, asked developers to add accessibility ids, and reused our TestNG, POM and reporting structure with a new driver factory. Result: twenty smoke tests ran nightly on emulators within four weeks, and release smoke testing dropped from half a day to forty minutes.
38
Write a docker-compose.yml that runs a Selenium hub with Chrome and Firefox nodes.
A cloud farm gives hundreds of device and OS combinations, parallel capacity and no hardware maintenance, but costs per minute, adds network latency and may raise data privacy concerns. An in-house lab is cheaper over time for a small fixed set of devices and gives full control, but needs USB hubs, OS updates, battery care and someone to maintain it. Many teams keep a few local devices for debugging and use the cloud for wide coverage.
40
Should every test in a project be written in Cucumber?
No. Cucumber adds a translation layer, so it is worth it for business-facing acceptance tests that stakeholders discuss. Unit tests, low-level API checks, data validations and technical edge cases are faster to write and maintain directly in TestNG or JUnit. A healthy project uses Cucumber for a focused set of key behaviours and plain code tests for everything else.
Tips to crack the EXL Automation Testing interview
Revise SQL, Excel and statistics such as hypothesis testing and regression, which are core to EXL analytics roles.
Practise guesstimates and simple business cases about credit card customers or insurance claims.
Learn insurance and banking analytics concepts like loss ratio, churn and collections propensity models.
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; EXL interviewers usually ask follow-ups on your first answer.
Frequently asked questions
How many rounds are there in the EXL Automation Testing interview?
Candidates usually go through 4 stages: Online assessment (aptitude + SQL or analytics); Technical interview; Case or guesstimate 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 EXL Automation Testing interview?
This practice set leans on Selenium Grid & Docker (6), Git, Maven and Jenkins (5), REST Assured (5), TestNG Framework (4). Revise those first, then practise explaining one or two of your own projects end to end, because most EXL interviewers ask you to walk through real work.
Are these the exact questions asked at EXL?
No. These are curated practice questions that match the skills and difficulty usually tested in analytics interviews like EXL's. They are not a leaked or verified list of past questions.
Where does EXL hire Automation Testing professionals in India?
EXL has large teams in Noida, Gurugram, Bengaluru, Pune. Openings and locations change often, so check the EXL careers page and filter by city and experience.
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