EPAM Systems QA Tester Interview Questions and Answers

Regression testing is the process of retesting a software application to ensure that new code changes have not adversely affected existing functionality.

• Regression testing is performed after code changes to verify that the existing features still work correctly.

• It helps in identifying any defects introduced by new code changes.

• Regression testing can be automated to save time and effort.

• Examples include running test cas...read more

Smoke testing is a quick test to check if the basic functionalities of the software are working fine, while sanity testing is a more thorough test to check if the specific functionalities are working as expected.

• Smoke testing is a subset of sanity testing

• Smoke testing is done to check if the build is stable enough for further testing

• Sanity testing is done to check specific functionalities after changes have been made

• Sm...read more

Exception handling in Java is a mechanism to handle runtime errors and prevent program crashes.

• Use try-catch blocks to handle exceptions

• Use finally block to execute code regardless of exception

• Use throw keyword to manually throw exceptions

• Use throws keyword in method signature to declare exceptions that can be thrown

Smoke testing is a quick test to check if the basic functionalities of the software are working, while sanity testing is a more thorough test to ensure that the software is ready for further testing.

• Smoke testing is done to check if the critical functionalities of the software are working properly.

• Sanity testing is done to ensure that the software is stable and ready for further testing.

• Smoke testing is usually done be...read more

Test scenarios are high-level descriptions of the functionality to be tested, while test cases are detailed steps to validate the scenarios.

• Test scenarios are broad and cover multiple test cases.

• Test cases are specific steps to validate a particular scenario.

• Test scenarios are usually created at the beginning of testing, while test cases are derived from scenarios.

• Test scenarios are used for high-level planning and est...read more

Use cases for application involve identifying different scenarios in which the application can be used to meet user needs.

• Testing different user interactions

• Validating system functionality

• Identifying edge cases

• Ensuring compatibility with different devices

• Verifying data integrity

Find min and max number in an array of strings

• Convert array elements to integers for comparison

• Use built-in functions like Math.min() and Math.max()

• Handle edge cases like empty array or non-numeric elements