Cucumber Interview Questions and Answers

If you’re preparing for a Senior QA Automation Engineer interview, chances are you’ll be asked several questions about Cucumber, Behavior-Driven Development (BDD), Scenario Outline, Data Tables, and framework design. While most candidates know the basics, interviewers often look for practical knowledge gained from real automation projects. In this guide, you’ll find 25+ commonly asked Cucumber interview questions and answers, complete with Java code examples and best practices used in enterprise automation frameworks.

What is Cucumber?

Cucumber is a Behavior-Driven Development (BDD) testing framework that enables collaboration between business analysts, developers, and QA engineers through executable specifications written in Gherkin.

Unlike traditional automation scripts, Cucumber scenarios are written in plain English, making them understandable to both technical and non-technical stakeholders.

Example:

Feature: Login
Scenario: Successful Login
Given user is on Login page
When user enters valid credentials
Then user should be logged in

1. What is Gherkin?

Gherkin is the language used to write Cucumber feature files.

Common keywords include:

• Feature
• Scenario
• Given
• When
• Then
• And
• But
• Background
• Scenario Outline
• Examples

These keywords help describe application behavior in a readable format.

2. Explain Given, When and Then

A Cucumber scenario generally follows the Arrange–Act–Assert pattern.

• Given – Defines the initial state or precondition.
• When – Performs the action.
• Then – Verifies the expected outcome.

Example:

Scenario: Product Search
Given Amazon homepage is open
When user searches for "Laptop"
Then search results should be displayed

3. What is the difference between Scenario and Scenario Outline?

A Scenario executes once with fixed data.

Scenario: Login
Given username "admin"
When password "admin123"
Then login should succeed

A Scenario Outline executes the same scenario multiple times using different datasets from the Examples table.

Scenario Outline: Login Validation
Given username "<username>"
When password "<password>"
Then result should be "<status>"
Examples:
| username | password | status |
| admin | admin123 | Success |
| admin | wrong123 | Failure |

Interview Tip: Mention that every row in the Examples table creates a separate test execution.

4. Explain Scenario Outline with Java Example

Feature:

Scenario Outline: Addition
Given first number is <num1>
And second number is <num2>
When numbers are added
Then result should be <result>
Examples:
| num1 | num2 | result |
| 10 | 20 | 30 |
| 5 | 15 | 20 |

Step Definition:

private int num1;
private int num2;
private int result;
@Given("first number is {int}")
public void firstNumber(int n1){
    num1 = n1;
}
@Given("second number is {int}")
public void secondNumber(int n2){
    num2 = n2;
}
@When("numbers are added")
public void addNumbers(){
    result = num1 + num2;
}
@Then("result should be {int}")
public void verifyResult(int expected){
    Assert.assertEquals(expected, result);
}

Best Practice: Use Scenario Outline whenever the same workflow must be validated with multiple input combinations.

5. What is a Data Table?

A Data Table allows multiple rows and columns of data to be passed into a single step.

Scenario: Create Users
Given the following users exist
| username | email |
| John | john@test.com |
| Mike | mike@test.com |
| David | david@test.com |

6. How do you read a Data Table?

@Given("the following users exist")
public void usersExist(DataTable table){
    List<Map<String,String>> users =
            table.asMaps(String.class,String.class);
    for(Map<String,String> user : users){
        System.out.println(user.get("username"));
        System.out.println(user.get("email"));
    }
}

This approach is commonly used when creating multiple users, validating bulk API requests, or submitting multiple form entries.

7. Scenario Outline vs Data Table

One of the most frequently asked Cucumber interview questions is the difference between these two concepts.

Use Scenario Outline when:

• Login validation
• Search functionality
• Form validation
• Cross-browser inputs

Use Data Tables when:

• Bulk user creation
• API payloads
• Employee records
• Shopping cart items

8. Can Scenario Outline and Data Table be used together?

Yes.

A Scenario Outline can dynamically populate values inside a Data Table, allowing each scenario execution to work with different structured input.

This technique is useful when testing large and reusable datasets.

9. What is Background?

Background contains common steps executed before every scenario within the same feature file.

Example:

Background:
Given user is logged in

It helps eliminate duplicate setup steps.

10. What are Tags?

Tags allow selective execution of scenarios.

Example:

@Smoke
Scenario: Login
@Regression
Scenario: Logout

Runner:

tags="@Smoke"

Complex example:

tags="(@Smoke or @Regression) and not @Ignore"

11. What are Hooks?

Hooks execute before or after scenarios.

@Before
public void setup(){
}
@After
public void teardown(){
}

Hooks are typically used for:

• Browser launch
• Browser closure
• Driver initialization
• Screenshot capture
• Logging
• Database cleanup
• API cleanup

12. Background vs Hooks

Many interviewers ask this question.

13. Explain the Cucumber Test Runner

The Test Runner controls how Cucumber executes the automation suite.

A typical runner includes:

• @RunWith(Cucumber.class)
• @CucumberOptions
• features
• glue
• tags
• plugin
• monochrome
• dryRun
• publish

Example:

@RunWith(Cucumber.class)
@CucumberOptions(
features="src/test/resources/features",
glue={"stepdefinitions","hooks"},
tags="@Smoke",
monochrome=true,
dryRun=false,
plugin={
"pretty",
"html:target/report.html",
"json:target/report.json",
"junit:target/report.xml",
"rerun:target/failed.txt"
}
)
public class TestRunner{
}

14. Explain the Most Important Runner Components

features

Location of feature files.

glue

Location of Step Definitions and Hooks.

tags

Execute only selected scenarios.

plugin

Generates HTML, JSON, XML, and rerun reports.

monochrome

Produces cleaner console output.

dryRun

Validates that every feature file step has a matching Step Definition without executing tests.

publish

Publishes Cucumber reports online.

15. Frequently Asked Interview Questions

What happens if glue is incorrect?

Cucumber cannot locate Step Definitions, and every scenario will fail with Undefined Steps.

What is the purpose of dryRun?

It verifies that all feature file steps are implemented but skips test execution.

What is the rerun plugin?

It records failed scenarios so that only failed tests can be executed in the next run.

Which runner options are used most often?

• features
• glue
• tags
• plugin
• monochrome
• dryRun
• publish

Final Interview Tip

Experienced QA Automation Engineers are expected to go beyond explaining syntax. Interviewers often expect you to discuss where and why you would use Scenario Outline, Data Tables, Hooks, Tags, and Runner configurations in a maintainable automation framework.

When answering, use practical examples from Selenium, Playwright, or API automation projects, explain the trade-offs, and emphasize maintainability, readability, and reusability. That approach demonstrates real-world experience rather than textbook knowledge.

Conclusion

Mastering these Cucumber interview questions and answers will help you confidently explain BDD concepts, framework design, and automation best practices during technical interviews. Focus on understanding the reasoning behind each feature instead of memorizing definitions, and you’ll be well prepared for Senior QA Automation Engineer roles.

Related Links

Cucumber JUnit5 Test Runner Setup

Why most Cucumber Projects are not actually doing BDD

Interview Preparation Page