Modifiers

Question 1

What is an access modifier?

Answer 1

Is a keyword that is used to set the access level for classes, attributes, methods and constructors

Question 2

Name the modifier groups

Answer 2

Access Modifiers
Non-Access Modifiers

Question 3

Access Modifiers

Answer 3

Control the access level

Question 4

Non-Access modifiers

Answer 4

Do not control access level but provide other functionality

Question 5

Name the class access Modifiers

Answer 5

Public
Default

Question 6

The public modifier makes the class

Answer 6

Accessible by any other class

Question 7

The default modifier makes the class

Answer 7

Only accessible by classes in the same package

Question 8

public, private, default and protected are modifiers for

Answer 8

Attributes, methods and constructors

Question 9

The private modifier provides access

Answer 9

Only within the declared class

Question 10

The protected modifier provides access to code

Answer 10

In the same package and subclass

Question 11

The Non-Access modifiers include

Answer 11

final, abstract, static, transient, synchronized, volatile

Question 12

The Non-Access modifiers for classes are

Answer 12

final and abstract

Question 13

Attributes and methods use the following Non-Access modifiers

Answer 13

final, static, abstract, transient, synchronized, volatile

Question 14

The final modifier for classes means

Answer 14

The class cannot be inherited by other classes

Question 15

The abstract modifier for classes means

Answer 15

The class cannot be used to create objects

Question 16

The final modifier on attributes and methods means

Answer 16

Attributes and methods cannot be overridden

Question 17

The static modifier means

Answer 17

Attributes and methods belong to the class rather than the object

Question 18

Abstract modifier for methods can

Answer 18

Only be used on a body-less method where the body is provided by the subclass. Eg

abstract class Modi {
public String first = “Yoki”;
public int age = 24;
public abstract void study();
}

class Student extends Modi {
public int gyear = 2024;
public abstract void study() {
System.out.println(“Study hard”);
}
}

Question 19

The transient method makes

Answer 19

Attributes and methods be skipped when serializing the object containing them

Question 20

synchronized modifier means

Answer 20

Methods can only be accessed by one thread at a time

Question 21

volatile modifier means

Answer 21

The value of an attribute is not cached thread-locally and is always read from the main memory