Colliers India Interview Questions and Answers

Abstract classes are partially implemented classes while interfaces are fully abstract classes.

• Abstract classes can have both implemented and abstract methods while interfaces can only have abstract methods.

• A class can only inherit from one abstract class but can implement multiple interfaces.

• Abstract classes can have constructors while interfaces cannot.

• Abstract classes can have instance variables while interfaces cannot.

• An abstract class can be used to define a base class f...read more

Overloading is having multiple methods with the same name but different parameters. Overriding is having a method in child class with the same name and signature as in parent class.

• Overloading is compile-time polymorphism while overriding is runtime polymorphism

• Overloading is used to provide different ways of calling the same method with different parameters

• Overriding is used to provide a specific implementation of a method in a child class

• Overloading can be done in the same ...read more

TakeScreenshot method in Selenium captures a screenshot of the current web page.

• Create an object of the TakesScreenshot interface

• Use the getScreenshotAs() method to capture the screenshot

• Save the screenshot to a file or display it in the console

There are several locators used in Selenium such as ID, Name, Class Name, Tag Name, Link Text, and Partial Link Text.

• ID - unique identifier for an element

• Name - name attribute of an element

• Class Name - class attribute of an element

• Tag Name - HTML tag name of an element

• Link Text - exact text of a link element

• Partial Link Text - partial text of a link element

Different design techniques for QA automation

• Data-driven testing

• Keyword-driven testing

• Behavior-driven development

• Model-based testing

• Exploratory testing