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Java Fundamentals for Students

Authored by Am Moro

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Java Fundamentals for Students
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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the correct way to declare a variable in Java?

var variableName int;

int variableName;

int: variableName;

int variableName = 0;

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Explain the concept of inheritance in Object-Oriented Programming.

Inheritance is the process of creating new classes without any relationship to existing ones.

Inheritance is a method to delete classes in programming.

Inheritance allows a subclass to inherit attributes and methods from a superclass, promoting code reuse and establishing a class hierarchy.

Inheritance allows a class to operate independently of other classes.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of the main method in a Java application?

The main method handles exceptions in Java.

The main method is responsible for garbage collection.

The main method is the entry point for a Java application.

The main method is used for defining classes.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define encapsulation and its benefits in Java.

Encapsulation is only about data hiding and has no other benefits.

Encapsulation in Java is the practice of restricting access to an object's internal state and requiring all interaction to be performed through an object's methods.

Encapsulation allows direct access to an object's internal state.

Encapsulation in Java is the same as inheritance.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the difference between an interface and an abstract class in Java?

An interface defines a contract with no implementation, while an abstract class can have both abstract and concrete methods and allows for state.

An abstract class can only have concrete methods, while an interface can have abstract methods.

An interface can have state, while an abstract class cannot.

An interface can extend multiple classes, while an abstract class can only extend one interface.

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