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Choose multiple correct answers.

• Inheritance allows a class to inherit the properties and methods of another class

• The keyword "extends" is used to indicate inheritance in Java. It is used in the declaration of a subclass to specify the superclass that it is inheriting from.

• A subclass can inherit the private members of the superclass

• Java supports both multiple inheritance of classes and interfaces

Choose multiple correct answers.

• private access modifier should be used for a variable or method to only be accessed within the same class

• public access modifier should be used for a variable or method that should be accessible from any class, regardless of the package

• protected access modifier should be used for a variable or method that should only be accessed within the same class and subclasses, in the same package

• default (no modifier) access modifier only allows access in the same class

What is the role of the Java Development Kit (JDK) in java programming? Choose multiple correct answers.

• A. A cross-platformed software development environment that offers a collection of tools and libraries necessary for developing Java-based software applications

• B. A core package used in Java programming, along with the JVM (Java Virtual Machine) and the JRE (Java Runtime Environment) to develop and deploy applications

• C. A software for building applications that combines common developer tools into a single graphical user interface (GUI).

• D. A text editor that can assist in writing software code with features such as syntax highlighting with visual cues

What are components of a class in Java OOP? Choose multiple correct answers.

• Constructors are responsible for object creation

• Attributes, Fields, Properties of a class represents by variables

• Behaviours, Modification code represent by methods or functions

• main() method for execution of the class

Choose multiple correct answers.

• The default value of an uninitialized int variable in Java is 0

• Constants can be changed during the execution of a program

• Variables and constants are both used to store values in Java

• Variables can be changed during the execution of a program

Choose multiple correct answers.

• The purpose of a getter method in Java is to get the value of a variable

• The purpose of a setter method in Java is to set the value of a variable

• return keyword used to define getter and setter method in Java

• Access modifiers often used for getter or setter method is public

A. The value of a reference type variable is the address refer to an object. B. The null constant refers to an empty or uninitialized reference variable. C. Reference variables usually must be initialized with the new keyword D. For Primitive types, memory location that stores data Select all that are correct.

• A. The value of a reference type variable is the address refer to an object.

• B. The null constant refers to an empty or uninitialized reference variable.

• C. Reference variables usually must be initialized with the new keyword

• D. For Primitive types, memory location that stores data

What operator is used to access the member(field or method) of the object?

• .

• {}

• []

• :

What is the file extension of Java source code?

• .java

• .class

• .jar

• .rar

What is a way to group related classes in Java and it is called a namespace?

• package

• file

• software

• folder