Question 1

The proper expression to compare the first characters of two string objects ^str1and ^str2is

Accepted Answer

The correct way to compare the first characters of two strings in C is by using the equality operator '==' on the first character of each string, which is accessed using the index 0.

Question 2

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

Accepted Answer

strcat() function concatenates the contents of one C-string with another C-string.

Question 3

The library function reverses the order of a character array.

Accepted Answer

E

Question 4

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

Accepted Answer

The function `strncpy` is a standard library function in C that copies a specified number of characters from one string to another.

Question 5

To declare an array that will store students' last names of up to 25 characters in length, which is an appropriate statement?

Accepted Answer

To store strings in C, you need a char array with an extra space for the null terminator. Thus, for 25 characters, you need an array of size 26.

Question 6

The null terminator stands for the ASCII code

Accepted Answer

The null terminator is represented by the ASCII code 0, which is used to mark the end of a string in C and other programming languages.

Question 7

The expression ^{strcmp("ab", "cde")}returns

Accepted Answer

The strcmp function compares two strings lexicographically and returns a negative integer if the first string is less than the second string. Since "ab" is lexicographically less than "cde", it returns a negative integer.

Question 8

After ^num⁼^{atoi("1000");}executes, what value is stored in the variable ^num?

Accepted Answer

The atoi function converts a string to an integer, so "1000" is converted to the integer 1000.

Question 9

The code ^{int x = 0; while (s[x] != 0){}^x++;}

Accepted Answer

The code iterates through the C-string `s` until it reaches the null terminator (`0`), incrementing `x` with each iteration. This results in `x` holding the length of the string.

Question 10

A C- string is a sequence of characters stored in consecutive memory, terminated by a

Accepted Answer

A C-string is a sequence of characters stored in consecutive memory, terminated by a null character.

Question 11

Assume that ^str1and ^str2are objects of the string class. The proper expression to use when comparing them for equality is

Accepted Answer

The equality operator (==) is used to compare the values of two objects. In this case, str1 and str2 are both objects of the string class, so the equality operator can be used to compare their values.

Question 12

The string class member function returns the C- string value of the string object.

Accepted Answer

The answer of The string class member function returns the...

Question 13

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

Accepted Answer

The `atoi` function in C is used to convert a string to an integer.

Question 14

The string class overloads the ⁺⁼operator to perform

Accepted Answer

The += operator in the string class is overloaded to concatenate two strings, appending the right-hand string to the left-hand string.

Question 15

A good way to convert a string such a ^"572"to an equivalent integer such as ⁵⁷²

Accepted Answer

Using an istringstream object with the extraction operator >> is a standard way to convert a string to an integer in C++.

Question 16

To access the last character of a string class object ^stryou can use the expression

Accepted Answer

In most programming languages, string indices start at 0, so the last character is at the index `length - 1`.

Question 17

A good way to convert a value of type double to a string is

Accepted Answer

The `ostringstream` class in C++ can be used to convert a double to a string by inserting the double into the stream and then using the `str()` method to get the string representation.

Question 18

An array of characters ending with the null terminator is called

Accepted Answer

A C-string is an array of characters ending with a null terminator in C and C++.

Question 19

The ^strcpyfunction's arguments are

Accepted Answer

The `strcpy` function in C takes two arguments: a pointer to the destination character array and a pointer to the source character array.

Question 20

The function accepts a C- string as an argument and returns the length of the string (not including the null terminator).

Accepted Answer

The `strlen` function in C is used to determine the length of a string, excluding the null terminator.

Quiz 12: More on C-Strings and the String Class

The proper expression to compare the first characters of two string objects ^str1and ^str2is

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

The library function reverses the order of a character array.

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

To declare an array that will store students' last names of up to 25 characters in length, which is an appropriate statement?

The null terminator stands for the ASCII code

The expression ^{strcmp("ab", "cde")}returns

After ^num⁼^{atoi("1000") ;}executes, what value is stored in the variable ^num?

The code ^{int x = 0; while (s[x] != 0) {}^x++;}

A C- string is a sequence of characters stored in consecutive memory, terminated by a

Assume that ^str1and ^str2are objects of the string class. The proper expression to use when comparing them for equality is

The string class member function returns the C- string value of the string object.

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

The string class overloads the ⁺⁼operator to perform

A good way to convert a string such a ^"572"to an equivalent integer such as ⁵⁷²

To access the last character of a string class object ^stryou can use the expression

A good way to convert a value of type double to a string is

An array of characters ending with the null terminator is called

The ^strcpyfunction's arguments are

The function accepts a C- string as an argument and returns the length of the string (not including the null terminator) .

Quiz 12: More on C-Strings and the String Class

The proper expression to compare the first characters of two string objects str1 and str2 is

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

The library function reverses the order of a character array.

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

To declare an array that will store students' last names of up to 25 characters in length, which is an appropriate statement?

The null terminator stands for the ASCII code

The expression strcmp("ab", "cde") returns

After num = atoi("1000") ; executes, what value is stored in the variable num?

The code int x = 0; while (s[x] != 0) { x++;}

A C- string is a sequence of characters stored in consecutive memory, terminated by a

Assume that str1 and str2 are objects of the string class. The proper expression to use when comparing them for equality is

The string class member function returns the C- string value of the string object.

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

The string class overloads the += operator to perform

A good way to convert a string such a "572" to an equivalent integer such as 572

To access the last character of a string class object str you can use the expression

A good way to convert a value of type double to a string is

An array of characters ending with the null terminator is called

The strcpy function's arguments are

The function accepts a C- string as an argument and returns the length of the string (not including the null terminator) .

The proper expression to compare the first characters of two string objects ^str1and ^str2is

The expression ^{strcmp("ab", "cde")}returns

After ^num⁼^{atoi("1000") ;}executes, what value is stored in the variable ^num?

The code ^{int x = 0; while (s[x] != 0) {}^x++;}

Assume that ^str1and ^str2are objects of the string class. The proper expression to use when comparing them for equality is

The string class overloads the ⁺⁼operator to perform

A good way to convert a string such a ^"572"to an equivalent integer such as ⁵⁷²

To access the last character of a string class object ^stryou can use the expression

The ^strcpyfunction's arguments are