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

Accepted Answer

Both `tolower` and `toupper` can be used to convert a character to a consistent case, allowing for case-insensitive comparison of user input.

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

Accepted Answer

The function that converts C-strings to integers is called "atoi". This is a commonly used function in C and C++ programming languages. Choices A, B, and C are not valid function names.

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

Accepted Answer

C

Question 4

The null terminator stands for this ASCII code.
A)57
B)100
C)1000
D)0
E)None of these

Accepted Answer

The null terminator is represented by the ASCII code 0, which signifies the end of a string. Other ASCII codes may represent different characters and symbols. Therefore, choice D, 0, is the correct option.

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

Accepted Answer

The function atoi() converts the string to an integer value. Therefore, atoi("10") will convert the string "10" to an integer value of 10. The other choices are either attempting to convert a string that is not a valid integer ("ten") or converting an integer to a string.

Question 6

This is the escape sequence representing the null terminator.
A)

B)	
C)\0
D)nullptr
E)None of these

Accepted Answer

The null terminator is represented by the escape sequence \0 in C++ (and other languages), which indicates the end of a character string. This character has a value of zero and is often used in memory operations and string comparisons. Choices A and B represent newline and tab characters, respectively, while D is a pointer value in C++.

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

Accepted Answer

The function to change a character from lower to upper case is toupper, which converts a lowercase letter to its uppercase equivalent.

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

Accepted Answer

The statement is simply a string of characters and numbers. It contains no code or instructions, so there cannot be a compiler error. The output is simply the string itself, which includes a lower case "z" at the beginning.

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

Accepted Answer

The commonly used function to calculate the length of a C-string is strlen, which returns the number of characters in the string excluding the null terminator. The other options listed are not commonly used functions for calculating the length of a C-string.

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

Accepted Answer

The isalpha function is specifically designed to determine whether a character is a letter of the alphabet or not. Therefore, it is the best choice in this scenario.

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

Accepted Answer

The isprint function is a standard C function that tests whether a character is printable or not. It returns a nonzero integer if the character is printable, and 0 otherwise.

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

Accepted Answer

The function that converts a C-string containing a number to the integer equivalent is atoi(). The other options are not relevant to this task – strToInt is not a standard library function, itoa converts an integer to a C-string, and int_from is not a valid function name.

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

Accepted Answer

The given expression includes alphanumeric characters and symbols such as underscores, so it is likely checking for both alphabetic characters and symbols. Thus, the correct choice is D, which includes both A and C.

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

Accepted Answer

The function that best fits this description is ispunct, which returns true if its argument is a printable character other than a letter, digit or whitespace.

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

Accepted Answer

The function isdigit() specifically checks whether a character is a digit or not, whereas the other options may have different meanings or encompass a broader range of characters.

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

Accepted Answer

The function atol (stands for 'ASCII to long') accepts a C-string as an argument and converts it to a long integer. This function is part of the standard library in the C programming language.

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

Accepted Answer

The answer of The strcpy function's arguments are:
A)two C-strings
B)two addresses
C)three...

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

Accepted Answer

The library function that can find one C-string inside another is strstr. This function searches for the first occurrence of a substring within a string and returns a pointer to the start of the substring, or a NULL pointer if the substring is not found. Therefore, B)strstr is the best choice.

Question 19

To determine whether a character is whitespace, use this function.
A)iswhite
B)isspace
C)iswhitespace
D)isblank
E)None of these

Accepted Answer

The built-in function "isspace" in Python returns True if a character is a whitespace character (space, tab, newline, etc.) and False otherwise. Therefore, it is the best choice to determine whether a character is whitespace.

Question 20

"Whitespace" encompasses which of the following?
A)tab
B)newline
C)space
D)All of these
E)None of these

Accepted Answer

Whitespace includes tabs, newlines, and spaces, so all of the options are correct.

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

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

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

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

The null terminator stands for this ASCII code.

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

This is the escape sequence representing the null terminator.

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

What is the output of the following statement?

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) .

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

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

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

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

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

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

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

The strcpy function's arguments are:

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

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

"Whitespace" encompasses which of the following?