Chapter 2

Which symbol is used to begin a preprocessor directive?

#

What is the first line of a C++ program?

#include <iostream>

Which of the following preprocessor directives is needed for the string class?

#include <string>

Which of the following is a character literal?

'A'

A group of statements, such as the contents of a function, is enclosed in what?

Braces {}

Unsigned data types can store positive or negative values.

False

When one of the division operator's operands is an integer, the result of the division will also be an integer.

False

You cannot initialize a named constant that is declared with the const modifier.

False

You may choose your own variable names in C++, including any of the C++ key words.

False

This is a programmer-defined name that represents some element of a program.

Identifier

What happens when cout encounters an endl stream manipulator?

It advances the output to the beginning of the next line for subsequent printing

This is like a variable, but its content is read-only and cannot be changed while the program is running.

Named constant

This refers to the way a programmer uses identifiers, spaces, tabs, blank lines, and punctuation characters to visually arrange a program's source code.

Programming Style

Which of the following is a common practice of C++ programming style?

Spreading a statement that is too long to fit on one line over several lines. Indenting all the lines inside a set of braces. Adding a blank line to visually separate definitions from executable statements.

A left brace in a C++ program should always be followed by a right brace later in the program.

True

A variable cannot be used in any part of the program before the definition.

True

Although all of C++'s key words must be written in lowercase, you may use uppercase letters in variable names.

True

An advantage of using named constants is that they make programs more self-documenting.

True

Because C++ is a free-flowing language, it is usually possible to spread a statement over several lines.

True

Boolean expressions are named in honor of English mathematician George Boole.

True

Character literals are enclosed in single quotation marks.

True

Comments are part of the program, but the compiler ignores them.

True

Preprocessor directives are not C++ statements

True

String literals are always stored in memory with a null terminator at the end.

True

The compiler doesn't actually see the #include directive. Instead it sees the code that was inserted by the preprocessor, just as if the programmer had typed it there.

True

The compiler doesn't care that each statement is on a separate line, or that spaces separate operators from operands.

True

The equal sign is an operator that copies the value on its right into the variable named on its left.

True

The scope of a variable is the part of the program where the variable may be used.

True

You must have a definition for every variable you intend to use in a program.

True

You should always choose names for your variables that give an indication of what the variables are used for.

True

shortand short intare the same data type.

True

Causes a double quotation mark to be printed

\"

Causes a single quotation mark to be printed

\'

Causes a backslash to be printed

\\

Causes the computer to beep

\a

Which of the following will assign the value 7 to an integer variable named days?

days = 7;

Which of the following data types can represent floating-point numbers?

float long double double

Which of the following must every C++ program have?

function main

Which of the following data types allows you to store the largest value?

int

Which of the following is a valid variable definition?

int number;

When you assign values to variables as part of the definition, it is called this:

intialization

This header file must be included in any program that uses the cout object.

iostream

The data that operators work with are called what?

operands

This special operator will report the number of bytes of memory used by any data type or variable.

sizeof

Which of the following expressions is an example of a unary operator?

-5

Which of the following is an example of a multi-line comment?

/* Knowledge comes, but wisdom lingers.*/

How much memory does a character normally occupy?

1 byte

Look at the following code. What value will be assigned to the result variable after this code executes? double result; int number1 = 5, number2 = 2; result = number1 / number2;

2

Which of the following does every C++ statement end with?

;

The first step in using the string class is to define a string object.

False

This data type allows you to create small integer variables that are suitable for holding true or false values.

bool

The text of a comment

can be anything the programmer wants to write

These make up the "core" of the C++ language and have specific purposes.

Key words

Causes the cursor to skip over to the next tab stop

\t

Which of the following IS a legal identifier?

____________

The word in the brackets of an include directive specifies

a file containing code that is copied into the program at that point

A preprocessor directive starts with #. Preprocessor directives are carried out

just before a program is processed by the compiler

Which of the following would store the integer literal 64 as a long long int?

lightYears = 64LL;

This is a piece of data that is written directly into a program's code.

literal

Every C++ program must contain a

main function

The preprocessor inserts the entire contents of the file into the program at the point it encounters this.

the #include directive

In C++ terminology, an lvalue is something that identifies a place in memory whose contents may be changed, and an rvalue is any expression that has a value.

true

The =symbol is called the assignment operator.

true

How many operands does a binary operator work with?

two

Which of the following is a specific rule that must be followed with all C++ identifiers?

The first character must be one of the letters a through z, A through Z, or an underscore character (_). Uppercase and lowercase characters are distinct. After the first character you may use the letters a through z or A through Z, the digits 0 through 9, or underscores.

Generally, there are three types of operators: unary, binary, and ternary.

True

Integer variables can hold only whole numbers.

True

One of the problems of portability is the lack of common sizes of data types on all machines.

True

The stream insertion operator is always written as two less-than signs with no space between them

True

There are no unsigned floating point data types.

True

Unless you specify otherwise, the information you send to cout is displayed in a continuous stream

True

Unlike a comment started with //, a multi-line comment can span several lines.

True

When a floating-point value is assigned to an integer variable, the fractional part of the value (the part after the decimal point) is discarded.

True

When string literals are sent to cout they are printed exactly as they appear inside the quotation marks.

True

Working with string objects is similar to working with variables of other types.

True

You can use cout to display the value of a string object.

True

Causes the cursor to back up, or move left one position

\b

Causes the cursor to go to the next line for subsequent printing

\n

Causes the cursor to go the beginning of the current line, not the next line

\r