Persistent Systems Lead Engineer Interview Questions, Process, and Tips

A program to reverse a string

• Iterate through the string from end to start and append each character to a new string

• Use built-in functions like reverse() or StringBuilder.reverse() in some programming languages

• Convert the string to an array, reverse the array, and then convert it back to a string

A program to read data from excel.

• Use a library like Apache POI or OpenPyXL to read excel files.

• Identify the sheet and cell range to read data from.

• Parse the data and store it in a suitable data structure.

• Handle errors and exceptions that may occur during the process.

Automation framework is a set of guidelines, standards, and tools used for automating software testing.

• It provides a structured approach to automate tests

• It includes tools for test case management, test data management, and reporting

• It helps in reducing manual effort and increasing test coverage

• Examples include Selenium, Appium, and TestNG