Cognizant Test Analyst Interview Questions, Process, and Tips

Polymorphism is the ability of an object to take on many forms. It allows objects of different classes to be treated as the same type.

• Polymorphism is a fundamental concept in object-oriented programming.

• It enables code reusability and flexibility.

• Polymorphism can be achieved through method overriding and method overloading.

• Example: A parent class Animal can have multiple child classes like Dog, Cat, and Bird. They can ...read more

StringBuilder is a class in Java that allows for efficient manipulation of strings.

• StringBuilder is mutable, meaning that it can be modified without creating a new object.

• It is more efficient than concatenating strings using the '+' operator.

• StringBuilder methods include append(), insert(), delete(), and replace().

Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.

• Inheritance allows a class to reuse code from another class.

• The existing class is called the parent class or superclass, and the new class is called the child class or subclass.

• The child class inherits all the properties and methods of the parent class.

• The child class can also add new pro...read more

Abstraction is the process of hiding complex details and presenting only the essential features of an object or system.

• Abstraction helps in reducing complexity and making things easier to understand.

• It allows us to focus on the important aspects of an object or system.

• For example, a car can be abstracted as a mode of transportation without going into the details of its internal workings.

• Abstraction is used in programmi...read more

Test Analyst interview questions on exception handling, waits, OOPs, bug life cycle, and agile.

• Checked and unchecked exceptions are used for handling errors in Java.

• Explicit, implicit, and fluent waits are used for synchronizing test scripts with web pages.

• Action class is used for performing mouse hover and other mouse-related actions.

• Object is an instance of a class, while class is a blueprint for creating objects.

• Abs...read more