Question 1

C++ Standard Library function getline, from the <string> header, reads characters up to, but not including, a(n)________ (which is discarded), then places the characters in a string.
A) tab
B) period
C) newline
D) \

Accepted Answer

The getline function reads characters up to a newline character, which is discarded, and then places the characters in a string.

Question 2

A header file is typically given the filename extension:
A) .h
B) .hdr
C) .header
D) .cpp

Accepted Answer

The most common and standardized file extension for header files is .h. This convention makes it easier for programmers to identify which files are header files and distinguish them from source code files.

Question 3

3.2 Q2. Which of the following statements is false?
A) Class names, member function names and data member names are all identifiers.
B) By convention, variable-name identifiers begin with an uppercase letter, and every word in the name after the first word begins with a capital letter; this naming convention is known as camel case.
C) Also by convention, class names begin with an initial uppercase letter, and member function and data member names begin with an initial lowercase letter.
D) All of the above are true.

Accepted Answer

By convention, variable-name identifiers begin with a lowercase letter or an underscore, and every word in the name after the first word begins with an uppercase letter; this naming convention is known as camel case.

Question 4

The ________ statement passes a value back to a function's caller.
A) recover
B) restore
C) pass
D) return

Accepted Answer

The keyword "return" is used in programming languages to pass a value back to the function's caller, indicating the end of the function and returning control to the calling code.

Question 5

C++ is a(n) ________ programming language because you can define new class types as needed.
A) strongly typed
B) extensible
C) inextensible
D) None of the above.

Accepted Answer

C++ is an extensible programming language, meaning that you can define new classes and data types as needed. This is one of the key features of object-oriented programming, as it allows you to build complex data structures and encapsulate behavior in a modular and reusable way. Strong typing refers to a language's ability to enforce strict data type rules, while inextensible languages do not allow for the creation of new types.

Question 6

A main function can "drive" an object by calling its member functions-without knowing how the class is implemented. In this sense, main is referred to as a(n) ________ program.
A) manipulator
B) driver
C) controller
D) operator

Accepted Answer

The question specifically mentions that the main function can drive an object by calling its member functions, and in programming terminology, the term "driver" is often used to refer to this type of main function. The other terms (manipulator, controller, operator) could also be used to describe main functions in certain contexts, but they are not as specific to the scenario described in the question.

Question 7

Each class you create becomes a new ________ you can use to declare variables and create objects.
A) variable
B) object
C) type
D) access modifier

Accepted Answer

A class creates a new type that can be used to declare variables and create objects. Choice A, variable, refers to a specific instance created from a class, not the class itself. Choice B, object, also refers to a specific instance created from a class, not the class itself. Choice D, access modifier, is not relevant to the statement.

Question 8

The return type ________ indicates that when a function completes its task, it does not return (i.e., give back) any information to its calling function.
A) null
B) virtual
C) nullptr
D) void

Accepted Answer

The return type "void" indicates that the function does not return anything.

Question 9

Which of the following statements is true?
A) The compiler knows about fundamental types that are "built into" C++.
B) A new type that you create is known as a user-defined type.
C) New classes, when packaged properly, can be reused by other programmers.
D) All of the above are true.

Accepted Answer

All three statements are true. A) is true because the C++ language defines fundamental types such as int, char, float, double, and others. B) is true because when you create a new type, it is not built into the language by default and is therefore "user-defined." C) is true because a well-packaged class can be reused by other programmers, which is an important feature of object-oriented programming.

Question 10

A member-function call can supply ________ that help the function perform its task.
A) parameters
B) arguments
C) classes
D) frameworks

Accepted Answer

In programming, parameters are the variables declared in the function prototype while arguments are the values passed to a function when it is called. Therefore, a member-function call can supply arguments that help the function perform its task.

Question 11

Functions that are not members of a class are called ________ functions.
A) isolated
B) global
C) universal
D) general

Accepted Answer

Functions that are not members of a class are known as global functions, as they can be accessed from anywhere in the program. The other choices (isolated, universal, general) are not commonly used terms for non-class functions.

Question 12

Assuming that text is a variable of type string, what will be the contents of text after the statement cin >> text; is executed if the user types Hello World! then presses Enter?
A) "H"
B) "Hello"
C) "Hello World"
D) "Hello World!"

Accepted Answer

The cin >> operator reads input up to the first whitespace character, so it will only read "Hello" into the variable text before stopping at the space.

Question 13

Typically, you cannot call a member function of a class until you create a(n) ________ of that class.
A) object
B) image
C) header
D) constructor

Accepted Answer

To call a member function of a class, you first need to create an object of that class. The object holds the data and provides access to the member functions. Therefore, the correct choice is A, object.

Question 14

Which of the following statements is true?
A) A class's body is enclosed in an opening left brace and a closing right brace.
B) A class definition terminates with a required semicolon.
C) Typically, each class definition is placed in a separate header with the .h filename extension.
D) All of the above are ture.

Accepted Answer

All of the statements are true. A class's body is enclosed in an opening left brace and a closing right brace. A class definition terminates with a required semicolon. Typically, each class definition is placed in a separate header with the .h filename extension.

Question 15

Which of the following statements is false?
A) The number and order of arguments in a function call must match the number and order of parameters in the function definition's parameter list.
B) Every function body is delimited by an opening left brace and a closing right brace. Within the braces are one or more statements that perform the function's task(s).
C) When program execution reaches a function's closing brace, the function returns to its caller.
D) None of the above is false.

Accepted Answer

All of the statements listed are true.

Question 16

Which of the following statements is false?
A) Variables declared in a particular function's body are local variables, which can be used only in that function.
B) When a function terminates, the values of its local variables are preserved.
C) A function's parameters also are local variables of that function.
D) The argument types in the member function call must be consistent with the types of the corresponding parameters in the member function's definition.

Accepted Answer

When a function terminates, the values of its local variables are destroyed and not preserved. The value of a local variable can only persist between function calls if it is declared static.

Question 17

To call a member function for a specific object, you specify the object's name, followed by a(n) ________, then the member function name and a set of parentheses.
A) dot operator
B) colon
C) ::
D) ->

Accepted Answer

The dot operator is used to access the members of an object, including member functions.

Question 18

Files ending in .cpp are known as ________ files.
A) executable
B) secure C++
C) source-code
D) class

Accepted Answer

Files ending in .cpp are typically source-code files. These files contain the source code written in the C++ programming language and are used to create executable programs or software.

Option A is incorrect because executable files are files that can be run directly by the computer’s operating system.

Option B is incorrect because "secure C++" is not a commonly used term to describe this type of file.

Option D is incorrect because a class file is a file that contains compiled bytecode that can be executed by the Java Virtual Machine, and is not specific to the C++ programming language.

Question 19

Which of the following statements is false?
A) Each object of a class shares one copy of the class's data members.
B) An object's data members exist before a program calls member functions on an object, while they are executing and after the member functions complete execution.
C) Data members are declared inside a class definition but outside its member functions' bodies.
D) Headers should never contain using directives or using declarations.

Accepted Answer

DA) This statement is false because each object of a class has its own copy of the class's data members, not a shared one. The shared elements are the class's static data members, not the regular data members.D) This statement is false because it's too absolute. While it's generally advised to avoid using directives (like `using namespace std;`) in header files to prevent namespace pollution in files that include the header, saying "never" is too strong. There are exceptions and different practices depending on the context, project standards, and scope of the using declarations.

Question 20

The default value for a string is ________.
A) null
B) void
C) blanks
D) the empty string

Accepted Answer

The default value for a string is the empty string, which means a string object with no characters in it. Null represents the absence of a value and is not a default value for a string. Void is a keyword in Java used to indicate that a method does not return a value. Blanks are not a default value either, as they represent a string with one or more spaces in it.

Quiz 3: Introduction to Classes, Objects and Strings

C++ Standard Library function getline, from the <string> header, reads characters up to, but not including, a(n) ________ (which is discarded) , then places the characters in a string.

A header file is typically given the filename extension:

3.2 Q2. Which of the following statements is false?

The ________ statement passes a value back to a function's caller.

C++ is a(n) ________ programming language because you can define new class types as needed.

A main function can "drive" an object by calling its member functions-without knowing how the class is implemented. In this sense, main is referred to as a(n) ________ program.

Each class you create becomes a new ________ you can use to declare variables and create objects.

The return type ________ indicates that when a function completes its task, it does not return (i.e., give back) any information to its calling function.

Which of the following statements is true?

A member-function call can supply ________ that help the function perform its task.

Functions that are not members of a class are called ________ functions.

Assuming that text is a variable of type string, what will be the contents of text after the statement cin >> text; is executed if the user types Hello World! then presses Enter?

Typically, you cannot call a member function of a class until you create a(n) ________ of that class.

Which of the following statements is true?

Which of the following statements is false?

Which of the following statements is false?

To call a member function for a specific object, you specify the object's name, followed by a(n) ________, then the member function name and a set of parentheses.

Files ending in .cpp are known as ________ files.

Which of the following statements is false?

The default value for a string is ________.