Nineleaps Technology Solutions Senior QA Engineer Interview Questions and Answers

To reverse a string and find the occurrence of a character in Java.

• Use StringBuilder to reverse the string.

• Use a loop to iterate through the string and count the occurrences of the character.

• Use the charAt() method to access individual characters in the string.

To take a screenshot in Selenium, use the getScreenshotAs method

• Create a WebDriver instance

• Use the getScreenshotAs method to capture the screenshot

• Save the screenshot to a file using File class

Getter and setter methods are used to access and modify the values of private variables in a class.

• Create a method with the prefix 'get' followed by the variable name to retrieve its value.

• Create a method with the prefix 'set' followed by the variable name to set its value.

• Ensure the getter method returns the value of the variable and the setter method updates the variable with the passed value.

Object-oriented programming paradigm and its four pillars: Inheritance, Encapsulation, Abstraction, Polymorphism

• Inheritance: Allows a class to inherit properties and behavior from another class

• Encapsulation: Bundling data and methods that operate on the data into a single unit

• Abstraction: Hiding the complex implementation details and showing only the necessary features

• Polymorphism: Ability to present the same interface