Deck 2: Introduction to C

Question 1

In a C++ program, two slash marks (//) indicate

A) the end of a statement
B) the beginning of a comment
C) the end of a program
D) the beginning of a block of code
E) None of these

Answer 1

B

Question 2

For every opening brace ({) in a C++ program, there must be a

A) string literal
B) function
C) comment
D) closing brace
E) None of these

Answer 2

D

Question 3

A named constant is like a variable, but it its content cannot be changed while the program is running.

Answer 3

True

Question 4

In C++, key words are written in all lowercase letters.

Question 5

In C++ you are required to name your variables so they indicate the purpose they will be used for.

Question 6

A statement that starts with a hashtag (or pound) symbol (#) is called a

A) comment
B) function
C) preprocessor directive
D) header file
E) None of these

Question 7

The preprocessor executes after the compiler.

Question 8

Escape sequences are always stored internally as a single character.

Question 9

The __________ causes the content of another file to be inserted into a program.

A) cout object
B) double slash (//)
C) #include directive
D) semicolon (;)
E) None of these

Question 10

In programming, the terms "line" and "statement" always mean the same thing.

Question 11

C++ does not have a built-in data type for storing strings of data.

Question 12

Floating point constants are normally stored in memory as doubles.

Question 13

Programming style refers to the way a programmer uses elements such as identifiers, spaces, and blank lines.

Question 14

C++ 11 introduced an alternative way to define variables, using the template key word and an initialization value.

Question 15

The __________ is(are) used to display information on the computer's screen.

A) opening and closing braces
B) opening and closing quotation marks
C) cout object
D) backslash
E) None of these

Question 16

When typing your source code into the computer, you should be careful since most of your C++ instructions, header files, and variable names are case sensitive.

Question 17

Because C++ is case-sensitive, all programs must have a function called main or Main.

Question 18

A value is stored in a variable with an assignment statement.

Question 19

The preprocessor reads a program before it is compiled and only executes those lines beginning with # symbol.

Question 20

In the following statement, the characters Hello! are a(n) cout << "Hello!";

A) variable
B) string literal
C) comment
D) object
E) None of these

Question 21

In C++11, if you want an integer literal to be treated as a long long int, you can append __________ at the end of the number.

A) L
B)
C) LONG LONG
D) LL
E)

Question 22

What will the following code display?
Cout << "Roses " << "are red";
Cout << "and " << "violets/n"
Cout << "are" << "blue" << endl;

A) Roses are red
And violets
Are blue
B) Roses are red and violets/nare blue
C) Roses are redand violets/nareblue
D) Roses are red and violets/n are blue

Question 23

What will the following code display?
Cout << "Monday";
Cout << "Tuesday";
Cout << "Wednesday";

A) Monday
Tuesday
Wednesday
B) Monday Tuesday Wednesday
C) MondayTuesdayWednesday
D) "Monday"
"Tuesday"
"Wednesday"
E) "Monday" "Tuesday" "Wednesday"

Question 24

What will the following code display?
Int x = 23, y = 34, z = 45;
Cout << x << y << z << endl;

A) 23 34 45
B) 23
34
45
C) xyz
D) 233445

Question 25

Which control sequence is used to skip over to the next horizontal tab stop?

A) \n
B) end1
C) \t
D) \b
E) \'

Question 26

In a cout statement, which of the following will advance the output position to the beginning of the next line?

A) endl or \n
B) end1 or /n
C) \n or \t
D) \t or \b
E) \\ or \'

Question 27

Which of the following must be included in any program that uses the cout object?

A) opening and closing braces
B) the header file iostream
C) comments
D) a namespace
E) None of these

Question 28

Every complete C++ program must have a

A) comment
B) function named main
C) symbolic constant
D) cout statement
E) None of these

Question 29

Data items whose values do not change while the program is running are

A) literals
B) variables
C) characters
D) integers
E) None of these

Question 30

The numeric data types in C++ can be broken into two general categories which are

A) numbers and characters
B) singles and doubles
C) integers and floating-point numbers
D) real and unreal numbers
E) numbers and literals

Question 31

What will the following code display?
Int number = 23;
Cout << "The number is " << "number" << endl;

A) The number is 23
B) The number is23
C) The number is number
D) The number is null
E) The number is

Question 32

A character literal is __________, whereas a string literal is __________

A) enclosed in quotation marks, enclosed in brackets
B) enclosed in brackets, enclosed in quotation marks
C) enclosed in double quotation marks, enclosed in single quotation marks
D) enclosed in single quotation marks, enclosed in double quotation marks
E) None of these

Question 33

Besides the decimal number system that is most common (base 10), two other number systems that can be used in C++ programs are

A) octal and fractal
B) octal and hexadecimal
C) base 2 and base 4
D) base 2 and binary
E) None of these

Question 34

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

A) purpose
B) variable definition
C) memory space
D) literal value
E) None of these

Question 35

Which data type typically requires only one byte of storage?

A) short
B) int
C) float
D) char
E) string

Question 36

Which of the following is not a valid C++ identifier?

A) April2018
B) employee_number
C) _1user
D) 1user
E) theLittleBrownFoxWhoRanAway

Question 37

A variable definition tells the computer

A) the variable's name and its value
B) the variable's data type and its value
C) the variable's name and the type of data it will hold
D) whether the variable is an integer or a floating-point number
E) None of these

Question 38

Character constants in C++ are always enclosed in

A) brackets ( < > )
B) braces ( { } )
C) single quotation marks ( ' ' )
D) pound sign and semicolon ( # ; )
E) Any of these

Question 39

What will the following code display?
Cout << "Four\n" << "score\n";
Cout << "and" << "\nseven";
Cout << "\nyears" << " ago" << endl;

A) Four
Score
And
Seven
Years ago
B) Four score and seven
Years ago
C) Four
Score
And seven
Years ago
D) Four score
And seven
Years ago

Question 40

A(n) __________ represents a storage location in the computer's memory.

A) literal
B) variable
C) comment
D) integer
E) None of these

Question 41

A multi-line comment

A) begins with /* and ends with */
B) can be used to mark as many lines as desired as comments
C) allows everything in the selected lines to be ignored
D) All of these are true

Question 42

Assuming that a program has the following string object definition, which statement correctly assigns the string literal "Jane" to the string object?
String name;

A) name = Jane;
B) name = 'Jane';
C) name = "Jane";
D) name = ;
E) string name = {Jane};

Question 43

In memory, C++ automatically places a(n) __________ at the end of string literals which __________.

A) semicolon, indicates the end of the statement
B) \n, indicates an escape sequence
C) null terminator, marks the end of the string
D) bracket, marks the end of the string
E) None of these

Question 44

Which of the following statements correctly assigns the character M to the variable named letter?

A) letter = M
B) letter = "M";
C) letter = 'M';
D) letter = (M);
E) letter = M;

Question 45

The float data type is considered ___________ precision and the double data type is considered __________ precision.

A) single, double
B) double, single
C) floating-point, double
D) floating-point, integer
E) None of these

Question 46

The data type of a variable whose value can be either true or False is

A) int
B) binary
C) bool
D) Boolean
E) T/F

Question 47

What is the value of number after the following statements execute?
Int number;
Number = 18 % 4 + 2;

A) 3
B) 4
C) 6.5
D) 0
E) unknown

Question 48

What is the value of cookies after the following statements execute?
Int number = 38, children = 4, cookies;
Cookies = number % children;

A) 2
B) 4
C) 9
D) 9.5
E) .5

Question 49

What is the value stored in the variable myNum after the following assignment statement executes?
MyNum = 23 % 5

A) 3
B) 4
C) 4.6
D) 115
E) None of these

Question 50

What is the value of number after the following statements execute?
Int number;
Number = 18 / 4;

A) 4.5
B) 4
C) 2
D) 0
E) unknown

Question 51

Which of the following lines must be included in a program that has string variables?

A) #include (string class)
B) #include namespace std;
C) #include
D) string var;
E) None of these

Question 52

The data type used to declare variables that can hold real numbers is

A) short
B) int
C) float
D) char
E) double

Question 53

Which of the following statements correctly defines a named constant named TAX_RATE that holds the value 0.075?

A) double TAX_RATE = 0.075;
B) const TAX_RATE;
Double TAX_RATE = 0.075;
C) const double TAX_RATE = 0.075;
D) double TAX_RATE;
Const TAX_RATE = 0.075;
E) const TAX_RATE = 0.075;

Question 54

A variable's __________ is the part of the program that has access to the variable.

A) data type
B) value
C) scope
D) assignment
E) None of these

Question 55

What is output of the following statement?
Cout << 4 * (15 / (1 + 3)) << endl;

A) 15
B) 12
C) 63
D) 72
E) None of these

Question 56

Given the following program, which line(s) cause(s) output to be displayed on the screen?
1 // This program displays my gross wages.
2 // I worked 40 hours and I make $20.00 per hour.
3 #include
4 using namespace std;
5
6 int main()
7 {
8 int hours;
9 double payRate, grossPay;
10
11 hours = 40;
12 payRate = 20.0;
13 grossPay = hours * payRate;
14 cout << "My gross pay is $" << grossPay << endl;
15 return 0;
16 }

A) lines 13 and 14
B) lines 8 and 9
C) line 14
D) lines 14 and 15
E) line 15

Question 57

What will be the output after the following lines of code execute?
Bool choice;
Choice = true;
Cout << "Your choice is " << choice << endl;

A) true
B) Your choice is true
C) Your choice is 1
D) Your choice is choice
E) None of these

Question 58

Which part of the following line is ignored by the compiler?
Double userName = "janedoe"; // user's name is janedoe

A) "janedoe"
B) user's name is
C) user's name is janedoe
D) //
E) None of these

Question 59

Using C++11:
What data type does the compiler determine for the variable cost in the following statement?
Auto cost = 14.95;

A) int
B) double
C) bool
D) char
E) string

Question 60

Which of the following defines a double-precision floating-point variable named payCheck?

A) float payCheck;
B) double payCheck;
C) payCheck double;
D) Double payCheck;

Question 61

Select all that apply. Which of the following statements is(are) true about named constants?

A) A named constant must be all uppercase.
B) The content of a named constant is read-only.
C) The value of a named constant cannot be changed while the program is running.
D) A named constant is defined using the const qualifier.
E) None of these

Question 62

Select all that apply. Using C++11:
Which of the following can be used to initialize an integer variable named dozen with the value of 12?

A) int dozen = 12;
B) int dozen(12);
C) int dozen = {12};
D) int dozen = (12);
E) int dozen {12};