Interview Questions and Answers

Key features of TestNG include annotations, grouping, parallel execution, data-driven testing, parameterization, and dependency management.

Dependency testing in TestNG allows you to specify the order of test method execution by defining dependencies between them using the 'dependsOnMethods' attribute.

Parallel execution in TestNG can be achieved by using the 'parallel' attribute in the suite or test tag in the testng.xml file or by using the parallel attribute in the @Test annotation.

The soft assert in TestNG allows you to collect multiple assertions during the execution of a test, even if one or more assertions fail. It doesn't stop the test execution immediately after the first assertion failure.

Groups in TestNG allow you to categorize test methods. You can then include or exclude specific groups while running tests, providing flexibility in test execution.

Listeners in TestNG allow you to customize and control the test execution process. Examples include TestListener, ITestListener, IAnnotationTransformer, and IInvokedMethodListener.

Data-driven testing in TestNG can be achieved by using the @DataProvider annotation or the dataProvider attribute in the @Test annotation, allowing you to supply different sets of data to the test method.

Cross-browser testing in TestNG can be achieved by parameterizing the browser type and using the @Parameters annotation or the dataProvider attribute to supply different browsers to the test method.

The @Listeners annotation in TestNG is used to specify one or more listener classes that will be notified during the test execution. This allows you to implement custom behavior at various stages of the test lifecycle.

The @Listeners annotation in TestNG is used to specify one or more listener classes that will be notified during the test execution. This allows you to implement custom behavior at various stages of the test lifecycle.

The 'dependsOnGroups' attribute in TestNG allows you to specify groups that must be executed before the current test method. It establishes a dependency relationship between groups.

Tests can be grouped using regular expressions in TestNG by specifying the 'groups' attribute in the testng.xml file with a regular expression pattern that matches the desired test groups.

The 'preserveOrder' attribute in the @Test annotation, when set to 'true', ensures that the order of test methods is preserved as defined in the testng.xml file, even when parallel execution is enabled.

Parameterization in TestNG allows you to run the same test method with different sets of data. This can be achieved using the @Parameters annotation or data providers.

The 'parallel' attribute in the tag of testng.xml allows you to run test classes or test methods in parallel. Possible values include 'methods', 'classes', and 'tests'.

The 'alwaysRun' attribute in the @DataProvider annotation ensures that the data provider method always runs, even if no test method depends on it. It helps in providing data dynamically.

Conditional skipping of a test method in TestNG can be achieved by using the 'enabled' attribute in the @Test annotation along with a condition that evaluates to true or false.

The 'threadPoolSize' attribute in the @Test annotation specifies the number of threads in the thread pool for parallel execution. It determines how many parallel instances of the test method should run.