1. which of the following statements most accurately describes encapsulation?

a. encapsulation combines both procedural and object-oriented programming.

b. encapsulation separates the implementation of a class from how the class is used.

c. encapsulation hides the implementation of a class from the user.

d. encapsulation provides the collection of methods and fields that are accessible from outside the class.

2. a programmer provides you with a class and some documentation describing how its method are used. when you create objects with this class, you will call methods on the object and get results. as a user, your use of this class is separate and distinct from how the code inside the class was implemented. which term best describes the concept at work here?

a. enumeration.

b. encapsulation.

c. subclassing.

d. abstraction.

3. which of the following is not considered an advantage of object-oriented programming?

a. the ability to combine data with methods that operate on the data.

b. the ability to create separate objects, each with its own values.

c. the ability to keep data and operations on the data separate.

d. the ability to prevent access to data through encapsulation.

4. suppose a class has a private instance string variable named name. which of the following blocks of code shows a correct getter method for name?

a. public void getname (string name) {
this. name = name;

b. public int getname( ) {
return name;

c. public string getname ( ) {
return name;

d. public string getname ( ) {
this. name = name;

5. which term best describes a relationship in which an object is owned exclusively by one other object?

a. composition.

b. association.

c. notation.

d. aggregation.

6. which term best describes a relationship in which an object is owned by several other objects?

a. composition.

b. association.

c. notation.

d. aggregation.

7. where are methods listed in a uml class diagram showing three parts?

a. in the top third of the diagram.

b. in the middle third of the diagram.

c. in the bottom third of the diagram.

d. anywhere in the diagram a lowercase m is shown.

8. suppose you have a ulm class diagram that represents a class named student. which of the following notations indicates a constructor?

a. +student (name: string)

b. +student: string

c. +student (name: string): string

d. +student( name: string): void

9. which of the following uml class diagram notations indicates a private array of type int?

a. private int [ ] array;

b. -int [ ] : array

c. -array [ ] : int

d. -array : int [ ]

10. consider the following code.

public class mydata {
private int[ ] data;

public void setdata (int[ ] newarray ) {
data = newarray;
}
public int[ ] getdata( ) {
return data;
}
public int getsize( ) {
return data. length;
}
}

which of the following uml class diagram notations correctly models one of the previous methods?

a. +setdata ( int [ ] newarray ): void

b. +getdata ( int [ ] ) : data

c. -getsize ( ) : int

d. +setdata ( newarray : int [ ] ) : void

1. D. Encapsulation provides the collection of methods and fields that are accessible from outside the class.

2. D. abstraction.

3. Which of the following is not considered an advantage of object-oriented programming?

A. the ability to combine data with methods that operate on the data.

B. the ability to create separate objects, each with its own values.

C. the ability to keep data and operations on the data separate.

D. The ability to prevent access to data through encapsulation.

4. Suppose a class has a private instance String variable named name. Which of the following blocks of code shows a correct getter method for name?

A. public void getName (String name) {

this.name = name;

B. public int getName( ) {

return name;

C. public String getName ( ) {

return name;

D. public String getName ( ) {

this.name = name;

5. Which term best describes a relationship in which an object is owned exclusively by one other object?

A. Composition.

B. Association.

C. Notation.

D. Aggregation.

6. Which term best describes a relationship in which an object is owned by several other objects?

A. Composition.

B. Association.

C. Notation.

D. Aggregation.

7. Where are methods listed in a UML class diagram showing three parts?

A. In the top third of the diagram.

B. In the middle third of the diagram.

C. In the bottom third of the diagram.

D. Anywhere in the diagram a lowercase m is shown.

8. Suppose you have a ULM class diagram that represents a class named Student. Which of the following notations indicates a constructor?

A. +Student (name: String)

B. +Student: String

C. +Student (name: String): String

D. +Student( name: String): void

9. Which of the following UML class diagram notations indicates a private array of type int?

A. private int [ ] array;

B. -int [ ] : array

C. -array [ ] : int

D. -array : int [ ]

10. Consider the following code.

public class MyData {

private int[ ] data;

public void setData (int[ ] newArray ) {

data = newArray;

}

public int[ ] getData( ) {

return data;

}

public int getSize( ) {

return data.length;

}

}

Which of the following UML class diagram notations correctly models one of the previous methods?

A. +setData ( int [ ] newArray ): void

B. +getData ( int [ ] ) : data

C. -getSize ( ) : int

D. +setData ( newArray : int [ ] ) : void

Explanation:

The options highlighted are the correct answers.

Encapsulation helps us through the leveraging of power to store the methods and the fields at one place, and we can use them from outside the class. Hence, the fourth option is right answer.

For the second, we are being provided a list of the methods, and we dont need to understand how they operate, and we only need to use them to ensure functioning. Hence the D, is the correct answer.

Object oriented programming never allows to keep the data and operations on the data separate via class at least, and this is not an advantage certainly. Hence, the C is the correct answer of the third question.

In fourth question, we are not setting and hence this is not required and we are going to return. Also, name is of type string. And hence, the C, is the correct option.

In the fifth question the object is owned by another object. However, there is exclusive ownership as well. and hence that cannot be owned by anybody else. Hence, this is aggregation.

In the sixth question the object is owned by another object. However, there is no exclusive ownership, and the object is owned by several objects. Hence, this is association.

The seventh question, the methods are shown in the bottom third of the diagram. The top part is for the name of the class, the middle part is for the attributes, and the bottom part is for the methods. Hence C is the correct answer.

In the 8th question, we have to declare the class constructor. and class name is student. This is to be done using notation in UML diagram. You should know that + denotes public, # denotes protected and  - denotes private. and we defile like method or attribute: data type. And hence, A is the correct option as name is of string type and student is a class. Same thing applies for various other options. And hence A is the correct answer.

The ninth question is straight forward.  - is for private and its an array of integers. And hence, C or -array[]: int is the correct answer.

The 10th question,

D is the correct option, and the answer is quite clear through the details being shared in the above questions which is are related to UML.