Question 1

Assume that ^str1and ^str2are variables of type C- string. The proper expression to use when comparing them for equality is A)^{str1.compare(str2)}. B)^{str1 =}^str2. C)^str1⁼⁼^str2. D)^{strcmp(str1, str2)==}⁰. E)None of the above

Accepted Answer

The strcmp function is used to compare C-strings for equality, returning 0 if they are equal.

Question 2

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

Accepted Answer

By passing arrays as arguments, you can write functions that can manipulate C-strings effectively.

Question 3

The ^itoafunction is similar to ^atoi, but it works in reverse.

Accepted Answer

The `itoa` function converts an integer to a string, while `atoi` converts a string to an integer, making them reverse operations.

Question 4

A library function that looks for the occurrence of one string inside another is A)^strsearch. B)^strfind. C)^strstr. D)^strcmp. E)None of the above

Accepted Answer

The `strstr` function in C is used to find the first occurrence of a substring in a string.

Question 5

The C++ compiler performs strict array bounds checking whenever an array of characters is being accessed.

Accepted Answer

The C++ compiler does not perform strict array bounds checking by default, and it is possible to access elements beyond the bounds of an array without any warning or error. It is the responsibility of the programmer to ensure that array bounds are not exceeded in their code.

Question 6

To use the ^strlenfunction in a program, you must ^#include A). B). C). D). E)None of the above

Accepted Answer

The strlen function is part of the C standard library and is declared in the <cstring> header file.

Question 7

To use the ^{ostringstream}class, you must include the ^{memstringstream}header file.

Accepted Answer

The correct header file for using the `ostringstream` class is ``, not ``.

Question 8

To declare a C- string, you should use the type expression ^string^*.

Accepted Answer

In C, a C-string is declared using the type `char` followed by an array size or a pointer, not `string*`.

Question 9

There exist C++ stream classes that write and read in- memory strings.

Accepted Answer

C++ provides stringstream class which reads and writes in-memory strings.

Question 10

The following statement declares a ^stringobject and initializes it to ^"Once^upon^{a time"}. string theString("Once upon a time");

Accepted Answer

The statement correctly declares a string object named theString and initializes it with the value "Once upon a time".

Question 11

The ^>>operator can be used to convert a value of type double to an equivalent string object stored in memory.

Accepted Answer

The ">>" operator is not used for converting a double to a string; it is typically used for bitwise right shift operations in programming languages like C++. To convert a double to a string, methods like to_string() in C++ or str() in Python are used.

Question 12

A C- string can be assigned to an variable whose type is the string class.

Accepted Answer

A C- string can be assigned to a variable whose type is the string class because the string class has a constructor that takes a C-string as an argument.

Question 13

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

Accepted Answer

C++ provides ample library functions to handle character values, such as functions for converting between uppercase and lowercase characters, checking if a character is a digit or a letter, and more.

Question 14

To account for the null terminator stored at the end of each C- string, the ^strlenfunction returns the number of characters in its argument, plus one.

Accepted Answer

The `strlen` function returns the number of characters in a C-string, excluding the null terminator.

Question 15

When using the ^strcatfunction, you must be careful not to overflow the bounds of the array allocated for the target string.

Accepted Answer

The `strcat` function in C does not check for buffer overflow, so it's important to ensure that the target array is large enough to hold the concatenated result to prevent overflow.

Question 16

The string class member function will return the number of characters in the string object. A)^capacity() B)^length() C)^{length(string}^s) D)^{capacity(string}^s) E)None of the above

Accepted Answer

The `length()` member function of the string class returns the number of characters in the string object.

Question 17

It is possible to implement a string class by using a dynamically allocated array of characters.

Accepted Answer

A string class can be implemented using a dynamically allocated array of characters, which allows for dynamic resizing and manipulation of the string data.

Question 18

The expression ^{str1 < str 2}is true when A)the string object ^str1precedes the string ^str²in alphabetic order. B)the length of the string ^str1is less than the length of the string ^str2. C)the string ^str1converted to numeric form is less than the string ^str2converted to numeric form. D)the C- string ^"str1"precedes the C- string ^"str2"in alphabetic order. E)None of the above

Accepted Answer

In Python, the '<' operator compares strings lexicographically, meaning it checks if one string precedes another in alphabetical order.

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

Assume that str1 and str2 are variables of type C- string. The proper expression to use when comparing them for equality is

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

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

A library function that looks for the occurrence of one string inside another is

The C++ compiler performs strict array bounds checking whenever an array of characters is being accessed.

To use the strlen function in a program, you must #include

To use the ostringstream class, you must include the memstringstream header file.

To declare a C- string, you should use the type expression string *.

There exist C++ stream classes that write and read in- memory strings.

The following statement declares a string object and initializes it to "Once upon a time". string theString("Once upon a time");

The >> operator can be used to convert a value of type double to an equivalent string object stored in memory.

A C- string can be assigned to an variable whose type is the string class.

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

To account for the null terminator stored at the end of each C- string, the strlen function returns the number of characters in its argument, plus one.

When using the strcatfunction, you must be careful not to overflow the bounds of the array allocated for the target string.

The string class member function will return the number of characters in the string object.

It is possible to implement a string class by using a dynamically allocated array of characters.

The expression str1 < str 2 is true when

Assume that ^str1and ^str2are variables of type C- string. The proper expression to use when comparing them for equality is