10+ Qa Developer Interview Questions and Answers

Integration testing checks if different modules work together, Black box testing checks functionality without knowing code, Regression testing checks if changes affect existing functionality.

• Integration testing verifies if different modules work together as expected

• Black box testing checks functionality without knowing the code

• Regression testing checks if changes affect existing functionality

• Integration testing is done after unit testing and before system testing

• Black box tes...read more

Possible test cases for previous projects/products

• Test cases for all functionalities

• Boundary value analysis

• Negative testing

• Integration testing

• Regression testing

• Usability testing

• Performance testing

• Security testing

Test coverage is the extent to which the software has been tested. Different types of test cases are written to ensure maximum coverage.

• Test coverage is the measure of how much of the software has been tested.

• Different types of test cases are written to ensure maximum coverage.

• Unit tests are written to test individual units of code.

• Integration tests are written to test how different units of code work together.

• Functional tests are written to test the functionality of the soft...read more

Retesting is testing the same functionality again after fixing the defects while regression testing is testing the entire system after making changes to ensure that the changes did not affect the existing functionality.

• Retesting is done to ensure that the defects reported earlier have been fixed.

• Regression testing is done to ensure that the changes made to the system did not affect the existing functionality.

• Retesting is a subset of regression testing.

• Regression testing is ti...read more

TestCases for ATM Machine

• Verify if the ATM machine is dispensing the correct amount of cash

• Check if the ATM machine is accepting valid debit/credit cards

• Test if the ATM machine is displaying the correct balance after a transaction

• Ensure that the ATM machine is not dispensing cash when the account balance is insufficient

• Verify if the ATM machine is returning the card after the transaction is complete

• Test if the ATM machine is providing a receipt after the transaction

• Check if t...read more

Count the number of times each character is repeated in a given string.

• Iterate through the string and store the count of each character in a hashmap.

• Print the count of each character from the hashmap.

Test cases ensure software quality. They should be comprehensive, clear, and repeatable.

• Identify test scenarios and objectives

• Create test cases with clear steps and expected results

• Ensure test cases cover all functional and non-functional requirements

• Execute test cases and report any defects found

• Update test cases as needed based on changes to the software

Apache POI is a Java library for reading and writing Microsoft Office documents.

• Create a FileInputStream object to read the file

• Create an XSSFWorkbook object using the FileInputStream

• Get the desired sheet from the workbook using getSheetAt() or getSheet() method

• Iterate through rows and cells to read the data

To store an array in a list, convert the array to a list data structure.

• Convert the array to a list using a list constructor or list comprehension.

• Example: array = ['apple', 'banana', 'cherry'] -> list = list(array)

• Example: list = [item for item in array]