Deck 10: Characters, C-Strings, and More About the String Class

Question 1

A practical application of this function is to allow a user to enter a response of 'y' or 'Y' to a prompt.

A)tolower
B)toupper
C)A or B
D)ignorecase
E)None of these

Answer 1

A or B

Question 2

This function converts a C-string to an integer and returns the integer value.

A)atoint
B)strtoint
C)strint
D)atoi
E)None of these

Answer 2

atoi

Question 3

The C-string company[12] can hold ________.

A)twelve characters
B)thirteen characters
C)eleven characters and the null terminator
D)twelve characters and the null terminator
E)None of the above

Answer 3

eleven characters and the null terminator

Question 4

The null terminator stands for this ASCII code.

A)57
B)100
C)1000
D)0
E)None of these

Question 5

Which statement converts the string "10" to the integer value 10?

A)itoa("ten")
B)atoi("ten")
C)atoi("10")
D)itoa(10)
E)None of these

Question 6

This is the escape sequence representing the null terminator.

A)\n
B)\t
C)\0
D)nullptr
E)None of these

Question 7

To change a character argument from lower to upper case, use this function.

A)isupper
B)toupper
C)tolarge
D)fromlower
E)None of these

Question 8

What is the output of the following statement?

A)upper case Z
B)lower case z
C)a lower case z followed by an upper case Z
D)a compiler error
E)None of these

Question 9

This function accepts a pointer to a C-string as an argument, and it returns the length of the C-string (not including the null terminator).

A)numchar
B)strlength
C)strlen
D)countstring
E)None of these

Question 10

To determine whether a character entered is a letter of the alphabet, use this function.

A)isdigit
B)fromkeyboard
C)alphaok
D)isalpha
E)None of these

Question 11

To test whether a character is a printable character, use this function.

A)isprint
B)isprintable
C)isprintok
D)isoktoprint
E)None of these

Question 12

This function accepts a C-string containing a number as its argument and returns the integer equivalent.

A)strToInt
B)itoa
C)atoi
D)int_from
E)None of these

Question 13

Look at the following statement.
The expression being tested by this statement will evaluate to true if var1 is:

A)an alphabetic character
B)9
C)a symbol such as $ or &
D)both A and C
E)None of these

Question 14

This function will return true if its argument is a printable character other than a digit, letter, or space.

A)isprint
B)ispunct
C)ischar
D)isnotdls
E)None of these

Question 15

To test whether a character is a numeric digit character, use this function.

A)isnumber
B)notAlpha
C)isnumeric
D)isdigit
E)None of these

Question 16

This function accepts a C-string as an argument and converts the string to a long integer.

A)atol
B)strlong
C)strtolong
D)stringlong
E)None of these

Question 17

The strcpy function's arguments are:

A)two C-strings
B)two addresses
C)three pointers
D)one array and one pointer
E)None of these

Question 18

A library function that can find one C- string inside another is:

A)strcmp
B)strstr
C)strfind
D)strsearch
E)None of these

Question 19

To determine whether a character is whitespace, use this function.

A)iswhite
B)isspace
C)iswhitespace
D)isblank
E)None of these

Question 20

"Whitespace" encompasses which of the following?

A)tab
B)newline
C)space
D)All of these
E)None of these

Question 21

A test using the isupper function will return false if the argument is an uppercase character.

Question 22

To define a C-string that will store students' last names of up to 25 characters in length, which is an appropriate statement?

A)char lastName[25];
B)string lastName[25];
C)char lastName[26];
D)string lastName[24];
E)None of these

Question 23

The C++ library provides functions for converting a string representation of a number to a numeric data type, and vice-versa.

Question 24

Which of the following lines of code defines an array of C-strings that will hold 49 characters and the null terminator?

A)char [49];
B)char str[50];
C)char[50] str;
D)character str[50];
E)None of the above

Question 25

To use the strlen function in a program, you must also write #include ________.

A)
B)
C)
D)
E)None of these

Question 26

When using the strcat function, you must be careful not to overwrite the bounds of an array.

Question 27

In C++, a C-string is a sequence of characters stored in consecutive memory, terminated by a ________.

A)period
B)space
C)null character
D)semicolon
E)None of these

Question 28

The itoa function is similar to atoi, but it works in reverse.

Question 29

The ftoa function converts a floating-point value to an ASCII value.

Question 30

By being able to pass arrays as arguments, you can write your own functions for processing C-strings.

Question 31

This function accepts pointers to two C-strings and an integer argument, which indicates how many characters to copy from the second C-string to the first.

A)strcpy
B)strncpy
C)copystring
D)strintcpy
E)None of these

Question 32

This function concatenates the contents of one C-string with another C-string.

A)strcopy
B)strappend
C)strcat
D)stradd
E)None of these

Question 33

If a C-string that cannot be converted to a numeric value is passed to the atoi function, the function's behavior is undefined by C++.

Question 34

The C++ compiler performs strict array bounds checking when it encounters an array of characters.

Question 35

The statement:

Will result in:

A)var1 storing the character value 'A'.
B)var1 storing the ASCII value for lower case 'a'.
C)A is output to the monitor.
D)a is output to the monitor.
E)None of these

Question 36

The isdigit function will return a true if its argument is a digit between 0 and 9.

Question 37

This library function reverses the order of a C-string.

A)reverstr
B)strrev
C)reversit
D)backward
E)None of these

Question 38

To change a lower case character to an upper case character, use this function.

A)atoi
B)itoa
C)ltou
D)toupper
E)None of these

Question 39

The strlen function returns a C-string's length and adds one for \0.

Question 40

After the following statement executes, what value is stored in the variable num?

A)1000
B)999 (1000 minus 1 for the null terminator)
C)"1000"
D)"thousand"
E)None of these

Question 41

C++ 11 introduces a function named to_string that converts a numeric value to a string object.

Question 42

The string class's front and back member functions were introduced in C++ 11.

Question 43

You may use the <, >, <=, >=, ==, and != relational operators to compare string objects.

Question 44

If an uppercase character is passed as an argument to toupper, the result will be an uppercase character.

Question 45

Although C++ provides ample library functions to handle numeric values, we must write all of our own functions to manipulate character values.