Java Test 1

What is the correct way to declare an instance variable in Java?

• public static int myVariable;
• static public int myVariable;
• int myVariable;
• protected int myVariable;

What is the purpose of a constructor in Java?

• To define a variable
• To create a new class
• To call a method
• To initialize instance variables

What is the difference between a class and an object in Java?

• A class is a blueprint for an object, while an object is an instance of a class.
• A class is a data type, while an object is a variable.
• A class contains variables and methods, while an object contains only variables.
• A class can have multiple instances, while an object is a single instance of a class.

What is the correct way to define a setter method in Java?

• public void setMyVariable();
• public setMyVariable(int value);
• public void setMyVariable(int value) { myVariable = value; }
• All of the above

Which of the following is a correct syntax for a single-line comment in Java?

• /*This is a comment*/
• This is a comment//
• // This is a comment
• # This is a comment

What is the purpose of a getter method in Java?

• To get the value of a variable
• To set the value of a variable
• To create a new object
• All of the above

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

• public MyClass { // code block }

• class public MyClass() { // code block }

• public class MyClass { // code block }

• None of the above

Which keyword is used to declare a class in Java?

• class

• void

• public

• static

Which of the following is a valid way to create an object of a class?

• ClassName = new classObject();
• ClassName c = new ClassName();
• create new classObject();
• create ClassObject();

What is the purpose of a setter method in Java?

• To retrieve the value of an instance variable
• To initialize the instance variables of an object
• To modify the value of a static variable
• To set the value of an instance variable