Lecture 7

Question 1

Access Modifier

The restriction to access the class members that are the 1.——- or 2.——-.

Answer 1

1. attributes
2. methods

Question 2

public (+) - class, package, subclass, world
protected (#) - class, package, subclass
default () - class, package
private (-) - class

Question 3

be accessed from == > any class
Whenever you declare attribute in public, any class can access that attribute even they are in the same package, different package and the outside.

Answer 3

Public (+)

Question 4

be accessed from ==> the same class
==> class in the same package
==> sub-class in the same package.
==> sub-class in the differenct package.

Answer 4

protected (#)

Question 5

be accessed from ==> the same class
==> class in the same package
==> sub-class in the same package

Answer 5

default()

Question 6

be accessed from ==> the same class only

Answer 6

private (-)

Question 7

1.——– is a set of instructions that allows a class or objects to perform a task.

Answer 7

1. Method

Question 8

2. What are the THREE types of methods?

Answer 8

1. Main method
2. Constructor
3. Class method

Question 9

1.——– is protect direct access to class variable, Data hiding, Maintainability and Controllable.

Answer 9

1. Encapsulation

Question 10

2.——- is Resuability, Extensibility, reuse the super class and IS-A relationship.

Answer 10

2. Inheritance

Question 11

3.——– is having multiple forms, Flexibility and having overloading method.

Answer 11

3. Polymorphism

Question 12

What is the OOP Concept?

Answer 12

E-I-P
-Encapsulation
-Inheritance
-Polymorphism

Question 13

• private attribute
• public getter and setter

Answer 13

E (Encapsulation)

Question 14

• extends -> class
• implements -> interface

Answer 14

I (Inheritance)

Question 15

• subclass -> super class

Answer 15

P (Polymorphism)

Question 16

what hides the implementation details of a class?

Answer 16

Encapsulation

Question 17

Multiple forms of method (function) in the same class is called?

Answer 17

Overloading method

Question 18

• Same method name but different number of parameters.
• When the number of parameters is the same, parameters must be different data types

Special - use parameter list to indicate which method must be used.

Answer 18

Overloading method

Question 19

Type 1
String print(String str, int var){}
String print(String str){}

Type 2
void print(String str){}
void print(int var){}
void print(double var){}

Answer 19

overloading method

Question 20

overloading can be used in Constructor
* public Car(){}
* public Car(String brand){}
* public Car(String brand, double price){}

Answer 20

use parameter list to indicate which method must be used