Question 1

Which of the following cannot be used to concatenate strings?

Accepted Answer

A)  + 
B)  += 
C)  append 
D)  assign 
A)  + 
B)  += 
C)  append 
D)  assign D

Question 2

Which of the following statements about C++11's functions for converting string objects to numeric values is false?

Accepted Answer

A)  Each function attempts to convert its entire string argument to a numeric value. 
B)  If no conversion can be performed, an invalid_argument exception occurs. 
C)  If the result of the conversion is out of range for the function's return type, an out_of_range exception occurs. 
D)  None of the above. 
A)  Each function attempts to convert its entire string argument to a numeric value. 
B)  If no conversion can be performed, an invalid_argument exception occurs. 
C)  If the result of the conversion is out of range for the function's return type, an out_of_range exception occurs. 
D)  None of the above. A

Question 3

If string s1 is lexicographically greater than string s2, then the value returned by s2.compare(0, s2.size(), s1) must be?

Accepted Answer

A)  0 
B)  -1 
C)  A negative number. 
D)  A positive number. 
A)  0 
B)  -1 
C)  A negative number. 
D)  A positive number. C

Question 4

The arguments passed to replace do not include:

Accepted Answer

A)  The subscript of the element where the replace operation ends. 
B)  The subscript of the element where the replace operation begins. 
C)  A replacement character string from which a substring is used to replace characters. 
D)  The element in the replacement character string where the replacement substring begins. 
A)  The subscript of the element where the replace operation ends. 
B)  The subscript of the element where the replace operation begins. 
C)  A replacement character string from which a substring is used to replace characters. 
D)  The element in the replacement character string where the replacement substring begins.

Question 5

The total number of elements that can be stored in a string without increasing its current amount of allocated memory is called its:

Accepted Answer

A)  Size. 
B)  Length. 
C)  Capacity. 
D)  Maximum size. 
A)  Size. 
B)  Length. 
C)  Capacity. 
D)  Maximum size.

Question 6

If string s1 has the value "computer" and string s2 has the value "promise", which call to insert will produce the string "compromise"?

Accepted Answer

A)  s1.insert(4, s2, 0, string::npos); 
B)  s1.insert(string::npos, s2, 0, 4); 
C)  s2.insert(0, s1, 0, 3); 
D)  s2.insert(3, s1, 0, 3); 
A)  s1.insert(4, s2, 0, string::npos); 
B)  s1.insert(string::npos, s2, 0, 4); 
C)  s2.insert(0, s1, 0, 3); 
D)  s2.insert(3, s1, 0, 3);

Question 7

String iterators:

Accepted Answer

A)  Must be dereferenced in order to access the character at each location. 
B)  Are not range checked. 
C)  Come in const and non-const forms. 
D)  All of the above. 
A)  Must be dereferenced in order to access the character at each location. 
B)  Are not range checked. 
C)  Come in const and non-const forms. 
D)  All of the above.

Question 8

Which of the following provides bounds checking?

Accepted Answer

A)  at 
B)  iterator 
C)  reverse_iterator 
D)  [ ] 
A)  at 
B)  iterator 
C)  reverse_iterator 
D)  [ ]

Question 9

Given the strings defined below, which statement will not return 0? string s1{"Mighty Mouse"};
String s2{"Mickey Mouse"};

Accepted Answer

A)  s1.compare(0, 3, s2, 0, 3); 
B)  s1.compare(7, 5, s2, 7, 5); 
C)  s1.compare(8, 12, s2, 8, 12); 
D)  s1.compare(7, 11, s2, 7, 11); 
A)  s1.compare(0, 3, s2, 0, 3); 
B)  s1.compare(7, 5, s2, 7, 5); 
C)  s1.compare(8, 12, s2, 8, 12); 
D)  s1.compare(7, 11, s2, 7, 11);

Question 10

Which of the following is an invalid definition?

Accepted Answer

A)  string sa = "computers"; 
B)  string sb{"computers"}; 
C)  string sc{'c'}; 
D)  string sd{9, 'c'}; 
A)  string sa = "computers"; 
B)  string sb{"computers"}; 
C)  string sc{'c'}; 
D)  string sd{9, 'c'};

Question 11

What type of value is returned by the overloaded equality and relational operators for strings?

Accepted Answer

A)  int 
B)  bool 
C)  double 
D)  null 
A)  int 
B)  bool 
C)  double 
D)  null

Question 12

Which of the statements a), b) and c) is false?

Accepted Answer

A) C++11's header now contains functions for converting from numeric values to string objects and from string objects to numeric values. B) The to_string function returns the string representation of its numeric argument and is overloaded for types int, unsigned int, long, unsigned long, long long, unsigned long long, float, double and long double. C) Each C++11 function that converts a string to an integral type receives two parameters-a string containing the characters to convert and a pointer to a size_t variable where the function stores the index of the first character that was not converted (a null pointer, by default). D) All of the above statements are true. A) C++11's header now contains functions for converting from numeric values to string objects and from string objects to numeric values. B) The to_string function returns the string representation of its numeric argument and is overloaded for types int, unsigned int, long, unsigned long, long long, unsigned long long, float, double and long double. C) Each C++11 function that converts a string to an integral type receives two parameters-a string containing the characters to convert and a pointer to a size_t variable where the function stores the index of the first character that was not converted (a null pointer, by default). D) All of the above statements are true.

Question 13

Strings:

Accepted Answer

A)  Can use the subscript operator to access individual characters. 
B)  Must be null-terminated. 
C)  Are pointers. 
D)  Have a first subscript of 1. 
A)  Can use the subscript operator to access individual characters. 
B)  Must be null-terminated. 
C)  Are pointers. 
D)  Have a first subscript of 1.

Question 14

Which of the following is false?

Accepted Answer

A)  If a string is converted to a C-style array using data, modifying the string could cause the pointer previously returned by data to become invalid. 
B)  Converting a string containing one or more null characters to a C-style string can cause logic errors. 
C)  c_str returns a character array of the same length as the string object it is called on. 
D)  copy implicitly converts a string to a non-null terminated character array. 
A)  If a string is converted to a C-style array using data, modifying the string could cause the pointer previously returned by data to become invalid. 
B)  Converting a string containing one or more null characters to a C-style string can cause logic errors. 
C)  c_str returns a character array of the same length as the string object it is called on. 
D)  copy implicitly converts a string to a non-null terminated character array.

Question 15

Iterators do not:

Accepted Answer

A)  Allow the characters to be modified. 
B)  Allow backward traversal of strings. 
C)  Have range checking. 
D)  Have syntax similar to pointer operations. 
A)  Allow the characters to be modified. 
B)  Allow backward traversal of strings. 
C)  Have range checking. 
D)  Have syntax similar to pointer operations.

Question 16

Which of the following returns a bool?

Accepted Answer

A)  length 
B)  empty 
C)  capacity 
D)  resize 
A)  length 
B)  empty 
C)  capacity 
D)  resize

Question 17

What is the code for a loop that iterates from the end of a string toward the beginning?

Accepted Answer

A)  string::reverse_iterator i{s.begin()}; while (i != s.end())
{
Cout << *i;
++i;
} 
B)  string::reverse_iterator i{s.rbegin()}; while (i != s.rend())
{
Cout << *i;
++i;
} 
C)  string::reverse_iterator i{s.end()}; while (i != s.begin())
{
Cout << *i;
--i;
} 
D)  string::reverse_iterator i{s.rbegin()}; while (i != s.rend())
{
Cout << *i;
--i;
} 
A)  string::reverse_iterator i{s.begin()}; while (i != s.end())
{
Cout << *i;
++i;
} 
B)  string::reverse_iterator i{s.rbegin()}; while (i != s.rend())
{
Cout << *i;
++i;
} 
C)  string::reverse_iterator i{s.end()}; while (i != s.begin())
{
Cout << *i;
--i;
} 
D)  string::reverse_iterator i{s.rbegin()}; while (i != s.rend())
{
Cout << *i;
--i;
}

Question 18

Which of the following is not an argument of the assign member function?

Accepted Answer

A)  The start location. 
B)  The number of characters to copy. 
C)  The end location. 
D)  The string to copy. 
A)  The start location. 
B)  The number of characters to copy. 
C)  The end location. 
D)  The string to copy.

Question 19

If string s contains "antidisestablishmentarianism", then s.substr(7, 13) would be:

Accepted Answer

A)  "establish" 
B)  "ishmenta" 
C)  "establi" 
D)  "establishment" 
A)  "establish" 
B)  "ishmenta" 
C)  "establi" 
D)  "establishment"

Question 20

The capabilities of inputting and outputting strings in memory are known as:

Accepted Answer

A)  String i/o manipulation. 
B)  String stream processing. 
C)  Character handling. 
D)  Dynamic string operations. 
A)  String i/o manipulation. 
B)  String stream processing. 
C)  Character handling. 
D)  Dynamic string operations.

Exam 21: Class String and String Stream Processing

Which of the following cannot be used to concatenate strings?

Which of the following statements about C++11's functions for converting string objects to numeric values is false?

If string s1 is lexicographically greater than string s2, then the value returned by s2.compare(0, s2.size(), s1) must be?

The arguments passed to replace do not include:

The total number of elements that can be stored in a string without increasing its current amount of allocated memory is called its:

If string s1 has the value "computer" and string s2 has the value "promise", which call to insert will produce the string "compromise"?

String iterators:

Which of the following provides bounds checking?

Given the strings defined below, which statement will not return 0? string s1{"Mighty Mouse"}; String s2{"Mickey Mouse"};

Which of the following is an invalid definition?

What type of value is returned by the overloaded equality and relational operators for strings?

Which of the statements a), b) and c) is false?

Strings:

Which of the following is false?

Iterators do not:

Which of the following returns a bool?

What is the code for a loop that iterates from the end of a string toward the beginning?

Which of the following is not an argument of the assign member function?

If string s contains "antidisestablishmentarianism", then s.substr(7, 13) would be:

The capabilities of inputting and outputting strings in memory are known as:

Introduction to Computers and C++

Introduction to C Programming; Inputoutput and Operators

Introduction to Classes, Objects and Strings

Control Statements, Assignment, and Operators

Control Statements, Logical Operators

Functions and an Introduction to Recursion

Class Templates Array and Vector; Catching Exceptions

Pointers and Pointer-Based Strings

Classes: a Deeper Look; Throwing Exceptions

Operator Overloading; String and Array Objects

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Stream Inputoutput: a Deeper Look

File Processing

Standard Library Containers and Iterators

Standard Library Algorithms

Exception Handling: a Deeper Look

Introduction to Custom Templates

Custom Templatized Data Structures

Searching and Sorting

Bits, Characters, C Strings and Structs

Other Topics

C++11 Additional Features

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