TestNG Interview Questions and Answers
Freshers / Beginner level questions & answers
Ques 1. What is TestNG?
TestNG is a testing framework inspired by JUnit and NUnit, designed to simplify a broad range of testing needs, from unit testing to integration testing.
Ques 2. What are TestNG annotations? Provide some examples.
TestNG annotations are markers in the code that define how the methods below them should be run. Examples include @Test, @BeforeMethod, @AfterMethod, @BeforeClass, @AfterClass, @BeforeSuite, @AfterSuite, and more.
Ques 3. What is the purpose of the @DataProvider annotation?
The @DataProvider annotation is used to supply test methods with data. It allows you to define a method that returns an Object[][] where each Object[] can be assigned as parameters to the test method.
Ques 4. How can you parameterize tests in TestNG?
Tests can be parameterized in TestNG using the @Parameters annotation and defining parameters in the testng.xml file. Alternatively, the @DataProvider annotation can be used to provide test data.
Ques 5. What is the difference between @BeforeTest and @BeforeSuite annotations?
@BeforeSuite is executed before any test runs in the suite, while @BeforeTest is executed before any test method belonging to the specified
Ques 6. How can you disable a test method in TestNG?
To disable a test method in TestNG, you can use the 'enabled' attribute in the @Test annotation and set it to 'false'.
Ques 7. What is the purpose of the @Parameters annotation?
The @Parameters annotation in TestNG is used to pass parameters to test methods. It is typically used in conjunction with the testng.xml file, where parameter values are specified.
Ques 8. Explain the purpose of the 'alwaysRun' attribute in TestNG annotations.
The 'alwaysRun' attribute, when set to 'true' in TestNG annotations, ensures that the annotated method (such as @BeforeMethod or @AfterMethod) always runs, even if the test method fails.
Ques 9. Explain the concept of testng.xml in TestNG.
The testng.xml file in TestNG is an XML configuration file that defines the structure and parameters for test execution. It allows you to customize the test suite, set parameters, and configure test groups.
Ques 10. Explain the use of the 'priority' attribute in the @Test annotation.
The 'priority' attribute in the @Test annotation allows you to specify the order in which test methods should be executed. Test methods with lower priority values are executed first.
Ques 11. What is the purpose of the 'timeOut' attribute in the @Test annotation?
The 'timeOut' attribute in the @Test annotation allows you to specify the maximum time (in milliseconds) that a test method should take to complete its execution. If the time exceeds this limit, the method is marked as a failure.
Ques 12. Explain the concept of testng-failed.xml in TestNG.
The testng-failed.xml file in TestNG is automatically generated when a test run has failures. It contains only the failed test methods and can be used to rerun only the failed tests.
Ques 13. What is the purpose of the 'alwaysRun' attribute in the @Test annotation?
The 'alwaysRun' attribute in the @Test annotation ensures that the annotated method (such as @BeforeMethod or @AfterMethod) always runs, even if the test method fails.
Ques 14. What is the purpose of the 'dependsOnMethods' attribute in TestNG?
The 'dependsOnMethods' attribute in TestNG allows you to specify dependencies between test methods. A test method will only be executed if the methods specified in 'dependsOnMethods' pass successfully.
Ques 15. Explain the use of the 'enabled' attribute in the @Test annotation.
The 'enabled' attribute in the @Test annotation allows you to enable or disable a test method. If set to 'false', the test method will be skipped during test execution.
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