Module 1 - OOP Concepts

Question 1

What does OOP stand for?

Answer 1

Object-Oriented Programming

Question 2

What is Procedural programming?

Answer 2

about writing procedures or methods that perform operations on the data,

Question 3

What is Object-oriented programming?

Answer 3

about creating objects that contain both data and methods.​

Question 4

Object Oriented programming is a programming style which is associated with the concepts like_________________
(6 items)

Answer 4

class,
object,
Inheritance,
Encapsulation,
Abstraction,
Polymorphism.

Question 5

What are samples of procedural-oriented programming

Answer 5

C, Fortran, Cobol and Pascal

Question 6

Give the 3 problem solving phases

Answer 6

1. Analysis
2. General solution
3. Verify

Question 7

In problem solving phases, what is “Analysis”?

Answer 7

Define problem and what solution must do

Question 8

In problem solving phases, what is “General Solution”?

Answer 8

Develop logical sequence of steps to solve problem

Question 9

In problem solving phases, what is “Verify”?

Answer 9

Follow steps - by hand

Question 10

What is the sequence structure?

Answer 10

series of processes carried out one after the other. Each instruction is executed in a serial manner, one after another.​

Question 11

What are the 4 advantages of OOP?

Answer 11

1. OOP is faster and easier to execute.​
2. It provides clear structure for the programs.​
3. Help us to keep the Java code DRY “Don’t Repeat Yourself”, and makes the code easier to maintain, modify and debug.
4. OOP makes it possible to create full reusable applications with less code and shorter development time.​

Question 12

The “Don’t Repeat Yourself (DRY)” principle is about ____________

Answer 12

reducing the repetition of code. You should extract out the codes that are common for the application and place them at a single place and reuse them instead of repeating it.​

Question 13

What is “class” in OOP?

Answer 13

encapsulates both the static properties and dynamic operations within a “box” and specifies the public interface for using these boxes. ​

Question 14

Java – What are Classes

Answer 14

Class – is like an object constructor, or a “blueprint” for creating objects.​

To create a class, use the keyword class:​

Question 15

Java – What are Objects?​

Answer 15

Object – In Java, an object is created from a class. Continuing with the example awhile ago we created the class named MyClass, so now we can use this to create objects.​

​
To create an object of Myclass, specify the class name, followed by the object name, and use the keyword new: ​

Question 16

In Creating objects and classes​, what is “Declaration” ?

Answer 16

Declaration − A variable declaration with a variable name with an object type.​

Question 17

In Creating objects and classes​, what is “Instantiation “ ?

Answer 17

Instantiation − The ‘new’ keyword is used to create the object.​

Question 18

In Creating objects and classes​, what is “Initialization” ?

Answer 18

Initialization − The ‘new’ keyword is followed by a call to a constructor. This call initializes the new object.

Question 19

OP languages permit higher level of abstraction for solving real-life problems.

Answer 19

higher level of abstraction

Question 20

give the 3 benefits of using OOP

Answer 20

-Ease in software design​

-Ease in software maintenance:​

-Reusable software

Question 21

in Java, a class is____

Answer 21

definition of objects of the same kind.

it is a blueprint, template, or prototype that defines and describes the static attributes and dynamic behaviors common to all objects of the same kind.

Question 22

This term usually refers to instance

Answer 22

“object”

Question 23

In Java, an Instance is ___________

Answer 23

a realization of a particular item of a class. In other words, an instance is an instantiation of a class.​

Question 24

what are the 3 compartments of a box?

Answer 24

1. Name (or identity): identifies the class.​
2. Variables (or attribute, state, field): contains the static attributes of the class.​
3. Methods (or behaviors, function, operation): contains the dynamic behaviors of the class.

Question 25

give the 3 parts to creating a class

Answer 25

-An optional access modifier​

-The keyword class​

-Any legal identifier you chose for the name of your class

example:
public class Employee

Question 26

_____________________frequently instantiate objects that use the objects of other classes (and their data and methods). Sometimes you write classes that do both. ​

Answer 26

Application classes

Question 27

A non-static field is an ______________

Answer 27

instance variable