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Question 40 1 pts

What statement regarding the use of the Object class and classes in general is accurate?

When you create any child class, no inheritance occurs automatically.

All classes inherit the Object class methods.

The object class contains a constructor, destructor, and two public instance methods.

Although every class descends from Object, not all objects are Objects.

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Question 41 1.5 pts

The terms directory and folder are used synonymously to refer to an entity that is used to organize files.

True

False

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Question 42 1.5 pts

The File class is contained in the System.IOFile namespace.

True

False

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Question 43 1.5 pts

When you write a C# program that stores a value in a variable, you are using temporary storage; the value you store is lost when the program ends or the computer loses power. What is the name for this kind of storage?

volatile

nonvolatile

permanent

hard

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Question 44 1.5 pts

Permanent storage that does not lose contents when a computer loses power is known as what type of storage?

volatile

temporal

nonvolatile

soft storage

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Question 45 1.5 pts

Files exist on devices such as hard disks, USB drives, reels of magnetic tape, and optical discs. What are these files considered to be?

temporary files

volatile files

soft files

permanent files

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Question 46 1.5 pts

When you store data in a computer file on a persistent storage device, what are you doing?

You are reading from the file.

You are using an input stream.

You are writing to the file.

You are flashing the data to memory.

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Question 47 1.5 pts

When you copy data from a file on a storage device into RAM, what are you doing?

You are writing to the file.

You are reading from the file.

You are copying to the file.

You are flashing the data to memory.

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Question 48 1.5 pts

What class contains methods that allow you to access information about files?

Cabinet

File

Directory

Folder

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Question 49 1.5 pts

What class can be used to provide information on directories or folders?

Directory

File

Cabinet

Folder

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Question 50 1.5 pts

What is a collection of fields that contain data about an entity?

a file

a character

a record

a bit

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Question 51 1.5 pts

A data file is what type of file when each record is read in order of its position in the file?

sequential access file

random access file

dynamic read file

temporary buffer file

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Question 52 1.5 pts

You are designing an application to support an automobile rental agency. Which of the following probably should NOT be represented as an object?

Auto.

Customer.

Payment amount.

Rental contract.

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Question 53 1.5 pts

After you have identified a set of classes needed for a program, you should now ____.

Define the behavior of each class.

Look for nouns that describe the tasks.

Begin writing the code for the classes.

Establish the relationships between the classes.

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Question 54 1.5 pts

A/an ____ represents a set of objects with the same behavior.

Association

Aggregation

Dependency

Class

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Question 55 1.5 pts

Classes correspond to ____ in a requirements description.

Verbs

Nouns

Dependencies

Relationships

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Question 56 1.5 pts

When designing classes, if you find classes with common behavior you should ____.

Combine them all into a single class.

Place the common behavior into a superclass.

Place the common behavior into a subclass.

Give them similar names.

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Question 57 1.5 pts

____ is often described as the is-a relationship.

Inheritance.

Aggregation.

Polymorphism.

Dependency.

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Question 58 1.5 pts

In general, you need ____ when an object needs to remember another object between method calls.

inheritance

aggregation

dependency

an interface implementation

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Question 59 1.5 pts

Aggregation denotes that ____.

Objects of one class inherit from objects of its superclass.

Objects of one class can be inherited by its subclasses.

Objects of one class contain references to objects of its superclass.

Objects of one class contain references to objects of another class.

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Question 60 1.5 pts

In a UML diagram, aggregation is denoted by ____.

A solid line with a diamond-shaped symbol next to the aggregating class.

An arrow with an open triangle pointing to the aggregating class.

A dotted line with a diamond-shaped symbol next to the aggregating class.

A dotted line with an open arrow tip pointing to the aggregating class.

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Question 61 1.5 pts

In a UML diagram, inheritance is denoted by ____.

A solid line with a diamond-shaped symbol next to the superclass.

A solid line with a closed arrow tip pointing to the superclass.

A dotted line with an open arrow tip pointing to the superclass.

A solid line with an open arrow tip pointing to the superclass.

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Question 62 1.5 pts

In a UML diagram, an interface implementation is denoted by ____.

A dotted line with a closed arrow tip.

A solid line with a closed arrow tip.

A dotted line with an open arrow tip.

A solid line with an open arrow tip.

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Question 63 1.5 pts

You are designing a software solution for an automobile rental company. A customer may rent only a single auto at a given time. You have decided that the following classes are needed: Auto, Customer, Address, Rental Contract. Which of these should be represented as aggregation?

Rental Contract class aggregates Address class

Rental Contract class aggregates Customer and Address classes.

Rental Contract class aggregates Customer, Address, and Auto classes.

Rental Contract class does not aggregate any of the other classes.