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English
3rd Grade

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47 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
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
2.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
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
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
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
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
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
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
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
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
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
7.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
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
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