Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) True 
 B)False  True

Question 3

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

Accepted Answer

A)   str1 = str2.
B)   str1 == str2.
C)   strcmp(str1, str2) .
D)   str1.compare(str2) .
E)   None of the above

Question 4

Which statements convert the string "10" to the integer value 10?

Accepted Answer

A)   istringstream istr("10") ; int x; istr >> x;
B)   ostringstream ostr("10") ; int x; ostr >> x;
C)   int x = stoi("10") ;
D)   int x = str("10") :
E)   None of the above

Question 5

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

Accepted Answer

A)   the boolean value false.
B)   the boolean value True.
C)   a negative integer.
D)   a nonnegative integer.
E)   None of the above

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

The strcpy function's arguments are

Accepted Answer

A)   two string class objects.
B)   two pointers to char.
C)   three pointers.
D)   three arrays and one pointer.
E)   None of the above

Question 8

The string class overloads the += operator to perform

Accepted Answer

A)   conversion to integers followed by addition.
B)   concatenation of two strings.
C)   calculation of the sum of the integer ASCII codes that comprise the characters in the string.
D)   calculation of the sum of the lengths of two strings.
E)   None of the above

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

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

Accepted Answer

A) True 
 B)False  False

Question 11

The expression str1 < str 2 is True when

Accepted Answer

A)   the string object str1 precedes the string str 2 in alphabetic order.
B)   the string str1 converted to numeric form is less than the string str2 converted to numeric form.
C)   the length of the string str1 is less than the length of the string str2.
D)   the C-string "str1" precedes the C-string "str2" in alphabetic order.
E)   None of the above

Question 12

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

Accepted Answer

A)   c_string(string s) 
B)   c_str(string s) 
C)   c_str() 
D)   c_string() 
E)   None of the above

Question 13

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

Accepted Answer

A)   str1 = str2.
B)   str1 == str2.
C)   strcmp(str1, str2)  == 0.
D)   str1.compare(str2) .
E)   None of the above

Question 14

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

Accepted Answer

A)   str1[0] = str2[0].
B)   str1[0] == str2[0].
C)   strcmp(str1[0], str2[0]) .
D)   'str1[0]' == 'str2[0]'.
E)   None of the above B

Question 15

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

Accepted Answer

A)   use the ostringstream class.
B)   use the strtodouble function.
C)   use the doubletoa function.
D)   use the doublestringstream class.
E)   None of the above

Question 16

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.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A)   length() 
B)   length(string s) 
C)   capacity() 
D)   capacity(string s) 
E)   None of the above

Question 18

The string class append member function str.append(s)tacks a string s to the end of str.

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A)   sets the variable x to point to the last character in the C-string s.
B)   computes the length of the C-string s into the variable x.
C)   sets the variable x to the ASCII code of the last character in the C-string s.
D)   sets the value of the variable x to 0.
E)   None of the above

Question 20

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

Accepted Answer

A) True 
 B)False

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedTrue

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

Correct AnswerverifiedShow Answer

Which statements convert the string "10" to the integer value 10?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The strcpy function's arguments are

Correct AnswerverifiedShow Answer

The string class overloads the += operator to perform

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedFalse

The expression str1 < str 2 is True when

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The string class append member function str.append(s)tacks a string s to the end of str.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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True

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B

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