EPAM Systems Interview Questions, Process, and Tips

Test plan is a detailed document that outlines the testing approach and activities. Test strategy is a high-level document that outlines the testing objectives and methods.

• Test plan is more detailed than test strategy

• Test plan includes specific test cases and test scenarios

• Test strategy outlines the overall testing approach and objectives

• Test strategy is created before the test plan

• Test strategy is reviewed and updated

Requirement Traceability Matrix is a document that links requirements to test cases. Compatibility testing checks if software works on different platforms.

• Requirement Traceability Matrix (RTM) is used to ensure that all requirements are tested and covered in test cases.

• RTM helps in tracking the progress of testing and ensures that all requirements are met.

• Compatibility testing is done to ensure that software works on d...read more

STLC is Software Testing Life Cycle which includes planning, designing, executing and reporting. Waterfall is a linear approach while Agile is iterative.

• STLC is a process of testing software from planning to reporting

• Waterfall is a linear approach where each phase is completed before moving to the next

• Agile is an iterative approach where testing is done in short cycles called sprints

• In Waterfall, testing is done at the...read more

Entry and exit criteria are maintained in the test plan document.

• Entry criteria specify the conditions that must be met before testing can begin.

• Exit criteria specify the conditions that must be met before testing can be considered complete.

• These criteria are typically documented in the test plan document.

• Examples of entry criteria include having the necessary test data and test environment set up.

• Examples of exit crit...read more

Iterative model is a software development model where the development process is divided into smaller iterations.

• Iterative model involves repeating the development process in small cycles.

• Each cycle involves planning, designing, building, testing and evaluating the software.

• Feedback from each cycle is used to improve the software in the next cycle.

• Iterative model is useful when requirements are not clear or keep changi...read more

Defects life cycle is a process that describes the stages of a defect from discovery to resolution.

• Defect is identified and reported

• Defect is assigned to a developer

• Developer fixes the defect

• Defect is retested by the tester

• If the defect is still present, it is reopened

• If the defect is fixed, it is closed

Requirements are mapped to test cases by analyzing the requirements and creating test cases that cover all the aspects of the requirement.

• Analyze the requirement document thoroughly

• Identify the key functionalities and features

• Create test cases that cover all the aspects of the requirement

• Ensure that the test cases are traceable to the requirement

• Review and validate the test cases with stakeholders

Files can be compared in Unix using the diff command.

• Use the 'diff' command followed by the two file names to compare them.

• The output will show the differences between the two files.

• Use the '-y' option to display the differences side by side.

• Use the '-q' option to only show if the files are different or not.

• Use the '-r' option to compare files in directories recursively.

Components of test cases include test case ID, test case description, test steps, expected results, actual results, and status.

• Test case ID: unique identifier for the test case

• Test case description: brief description of the test case

• Test steps: detailed steps to execute the test case

• Expected results: expected outcome of the test case

• Actual results: actual outcome of the test case

• Status: pass/fail status of the test cas

Incomplete testing can lead to undetected defects and potential risks in production.

• Undetected defects can cause system failures and downtime.

• Incomplete testing can lead to security vulnerabilities.

• Lack of testing can result in poor user experience and customer dissatisfaction.

• Incomplete testing can lead to increased maintenance costs and longer development cycles.

I will produce test plan, test cases, test scripts, defect reports, and test summary report.

• Test plan outlining the testing approach and scope

• Test cases with steps, expected results, and actual results

• Test scripts for automation

• Defect reports with steps to reproduce and severity

• Test summary report with overall results and recommendations

Complex primary keys in Spring Data JPA can be created using @EmbeddedId or @IdClass annotations

• Use @EmbeddedId annotation to create a composite primary key using an embeddable class

• Use @IdClass annotation to create a composite primary key using a separate class for the key fields

• Implement equals() and hashCode() methods in the embeddable or separate key class for proper comparison and hashing

The root class in Java is the Object class, which is the parent class for all other classes in Java.

• The Object class is used to provide common methods and behaviors that are inherited by all other classes.

• It defines methods like toString(), equals(), and hashCode() that can be overridden by subclasses.

• All classes in Java implicitly extend the Object class, either directly or indirectly.

• For example, the String class ext

Kotlin provides several types of collections, including arrays and lists, to store and manipulate data.

• Kotlin arrays are fixed-size collections that store elements of the same type.

• Kotlin lists are dynamic-size collections that can store elements of different types.

• To create an array of strings in Kotlin, you can use the Array type.

• Alternatively, you can use the shortcut syntax StringArray.

• Example: val names: Array = a