Question 1

In a three-tier architecture, the classes in the ____ tier generally use data entered by users and data obtained from storage.
A) processing
B) persistence
C) presentation
D) business

Accepted Answer

The answer of In a three-tier architecture, the classes in...

Question 2

The ____ tier is also called the data access tier in a three-tier architecture.
A) presentation
B) business
C) persistence
D) data processing

Accepted Answer

The persistence tier is responsible for storing and retrieving data from a database. It is sometimes called the data access tier because it provides an interface for other tiers to access and manipulate data. The presentation tier is responsible for user interaction, while the business tier contains the application logic. The data processing tier is not typically used in a three-tier architecture.

Question 3

Which of the following contains the correct code to create and instantiate an object named MyStudent from a class named Student?
A) Dim objStudent As Student
B) Dim objStudent As New Student
C) Dim objStudent = Student
D) Dim objStudent = New Student

Accepted Answer

The answer of Which of the following contains the correct...

Question 4

A subclass can use attributes from a(n) ____ class if those attributes were defined in the subclass.
A) inheriting
B) disseminating
C) distributing
D) base

Accepted Answer

A subclass can use attributes from a base class if those attributes are inherited from the base class.

Question 5

Data that is ____ remains after the program is terminated.
A) extant
B) legacy
C) lingering
D) persistent

Accepted Answer

Persistent data remains even after the program or system has been shut down or terminated, whereas extant data refers to data that still exists but may not necessarily have been accessed or utilized recently. Legacy data refers to outdated systems or technologies that are no longer in use, and lingering data may refer to data that remains temporarily in a system or memory but is not intentionally saved or stored.

Question 6

The processing in the ____ tier ensures that valid data is entered into the program for processing in the business tier.
A) validation
B) presentation
C) business
D) persistence

Accepted Answer

The answer of The processing in the ____ tier ensures...

Question 7

The ____ statement can be used to instantiate an object from a class.
A) Create
B) CreateObject
C) Instantiate
D) New

Accepted Answer

The "New" keyword is used to create a new instance of a class in VBScript. It is the most commonly used keyword for object instantiation in VBScript.

Question 8

When an object requires data when it is instantiated, the data can be passed as part of the ____ code.
A) encapsulation
B) inheritance
C) instantiation
D) declaration

Accepted Answer

When an object is instantiated, it is created from a class, and any required data can be passed as arguments to the constructor method during instantiation. This is known as instantiation. Encapsulation refers to the practice of hiding implementation details to promote abstraction and maintainability. Inheritance refers to the ability of a class to inherit properties and behavior from a parent or base class. Declaration refers to the act of defining a variable or function.

Question 9

The ____ tier implements the "business rules" required for the application.
A) business
B) data access
C) data processing
D) rules

Accepted Answer

The answer of The ____ tier implements the "business rules"...

Question 10

When designing a program using the three-tier approach, a primary rule is that classes in the presentation tier can communicate only with classes in the ____ tier.
A) business
B) data access
C) persistence
D) validation

Accepted Answer

In the three-tier approach, the presentation tier is responsible for user interaction and displaying data to the user. It should not communicate with the data access or persistence tier directly. Instead, all communication between the presentation tier and the business tier should go through a well-defined interface. This reduces coupling between the layers and makes it easier to maintain and scale the application. Therefore, the correct answer is A) business.

Question 11

The code in a(n) ____ procedure executes before any other code in an object.
A) beginner
B) builder
C) constructor
D) instantiation

Accepted Answer

The constructor procedure executes before any other code in an object. It is used to initialize values and prepare the object for use. Option A is not a programming term. Option B is a reference to a software tool used for building applications. Option D refers to the creation of an instance of an object, which occurs after the constructor has executed.

Question 12

In a three-tier architecture for Web applications, the ____ tier contains the Web page that appears to the user.
A) business
B) interface
C) persistence
D) presentation

Accepted Answer

The presentation tier is responsible for presenting the user interface to the user. This tier includes the web pages, the graphical user interface (GUI), and all other inputs and outputs that the user sees and interacts with.

Question 13

The ____ prepares an object for use in the program.
A) constructor
B) class variable
C) class declaration
D) destructor

Accepted Answer

The constructor is responsible for initializing an object and preparing it for use in the program. It is called automatically when an object is created.

Question 14

The ____ keyword is used to declare a variable that will contain the address of an object created from a class.
A) Dec
B) Const
C) Dim
D) Set

Accepted Answer

The answer of The ____ keyword is used to declare...

Question 15

In a three-tier architecture, the ____ tier contains the logic and calculations.
A) business
B) persistence
C) presentation
D) validation

Accepted Answer

The business tier, also known as the application tier, contains the logic and calculations in a three-tier architecture. This tier is responsible for handling business rules, processing data, and performing calculations. It acts as an intermediary between the presentation layer and the data persistence layer. Hence, option A) is the correct choice.

Question 16

Whenever inheritance is used, the subclass must fit into a(n) ____ relationship with the base class.
A) equivalence
B) "has-a"
C) helper
D) "is-a"

Accepted Answer

Inheritance represents an "is-a" relationship, meaning that a subclass is a more specific type of the base class. This is because the subclass includes all the attributes and behavior of the base class, while also adding its own unique attributes and behavior.

Question 17

When a class is ____ into an object using the New keyword, a special procedure called a constructor is executed in the class.
A) encapsulated
B) inherited
C) instantiated
D) constructed

Accepted Answer

When a class is instantiated into an object using the New keyword, a special procedure called a constructor is executed in the class. The constructor is responsible for initializing the object's properties and setting up its initial state. This process is known as instantiation. Encapsulation refers to the idea of hiding the internal details of a class and providing a public interface for accessing its functionality. Inheritance refers to the technique of creating new classes based on existing classes, and inheriting their properties and behavior. Construction is a general term used to refer to the process of creating objects, structures, or systems from various components or parts.

Question 18

Data that is stored in a file or database on disk often is called ____ data.
A) persistent
B) extant
C) resistant
D) existing

Accepted Answer

Persistent data refers to data that is stored on a permanent storage medium such as a hard drive or database, and is not lost when the computer is shut down or the power is lost. This type of data is often used for long-term storage and can be accessed and retrieved at a later time.

Question 19

If the developer writes no code for a class ____, Visual Basic automatically generates any processing that must be accomplished to prepare the object for use.
A) builder
B) constructor
C) creator
D) instantiator

Accepted Answer

A constructor is a special method that is automatically called when an instance of a class is created. If the developer writes no code for a constructor, Visual Basic automatically generates any processing that must be accomplished to prepare the object for use. The other choices (A, C, and D) are not commonly used terms in Visual Basic programming in the context of creating objects.

Question 20

____ is the concept of separating processing and hiding data within specific classes.
A) Encapsulation
B) Inheritance
C) Object-oriented programming
D) Persistence

Accepted Answer

Encapsulation refers to the concept of bundling data (attributes) and methods (functions) that operate on that data within a single unit (class) and hiding the details of the implementation from the user. This ensures that the data is not accessed or modified outside of the class and prevents unauthorized access or modification of the data.

Quiz 11: Multiple Classes and Inheritance

In a three-tier architecture, the classes in the ____ tier generally use data entered by users and data obtained from storage.

The ____ tier is also called the data access tier in a three-tier architecture.

Which of the following contains the correct code to create and instantiate an object named MyStudent from a class named Student?

A subclass can use attributes from a(n) ____ class if those attributes were defined in the subclass.

Data that is ____ remains after the program is terminated.

The processing in the ____ tier ensures that valid data is entered into the program for processing in the business tier.

The ____ statement can be used to instantiate an object from a class.

When an object requires data when it is instantiated, the data can be passed as part of the ____ code.

The ____ tier implements the "business rules" required for the application.

When designing a program using the three-tier approach, a primary rule is that classes in the presentation tier can communicate only with classes in the ____ tier.

The code in a(n) ____ procedure executes before any other code in an object.

In a three-tier architecture for Web applications, the ____ tier contains the Web page that appears to the user.

The ____ prepares an object for use in the program.

The ____ keyword is used to declare a variable that will contain the address of an object created from a class.

In a three-tier architecture, the ____ tier contains the logic and calculations.

Whenever inheritance is used, the subclass must fit into a(n) ____ relationship with the base class.

When a class is ____ into an object using the New keyword, a special procedure called a constructor is executed in the class.

Data that is stored in a file or database on disk often is called ____ data.

If the developer writes no code for a class ____, Visual Basic automatically generates any processing that must be accomplished to prepare the object for use.

____ is the concept of separating processing and hiding data within specific classes.