Question 1

The type of function a client would use to check the balance of a bank account would be:

Accepted Answer

A)  A utility function. 
B)  A predicate function. 
C)  An access function. 
D)  A constructor. 
A)  A utility function. 
B)  A predicate function. 
C)  An access function. 
D)  A constructor. C

Question 2

Parameterized stream manipulator setfill specifies the fill character that's displayed when an output is displayed in a field wider than the number of characters or digits in the output. The effect of setfill applies:

Accepted Answer

A)  Only to the current value being displayed. 
B)  Only to outputs displayed in the current statement. 
C)  Until explicitly set to a different setting. 
D)  Until the output buffer is flushed. 
A)  Only to the current value being displayed. 
B)  Only to outputs displayed in the current statement. 
C)  Until explicitly set to a different setting. 
D)  Until the output buffer is flushed. C

Question 3

A class's functions can throw exceptions, such as __________to indicate invalid data.

Accepted Answer

A)  invalid_data 
B)  bad_data 
C)  invalid_argument 
D)  bad_argument 
A)  invalid_data 
B)  bad_data 
C)  invalid_argument 
D)  bad_argument C

Question 4

Which of the following statements about friend functions and friend classes is false?

Accepted Answer

A)  A class can either grant friendship to or take friendship from another class using the friend keyword. 
B)  A friend declaration can appear anywhere in a class definition. 
C)  A friend of a class can access all of its private data member and member functions. 
D)  The friendship relationship is neither symmetric nor transitive. 
A)  A class can either grant friendship to or take friendship from another class using the friend keyword. 
B)  A friend declaration can appear anywhere in a class definition. 
C)  A friend of a class can access all of its private data member and member functions. 
D)  The friendship relationship is neither symmetric nor transitive.

Question 5

Given the class definition: class CreateDestroy
{
Public:
CreateDestroy() {cout << "constructor called, ";}
~CreateDestroy() {cout << "destructor called, ";}
};
What will the following program output?
Int main()
{
For (int i = 1; i <= 2; ++i) {
CreateDestroy cd;
}
Return 0;
}

Accepted Answer

A)  constructor called, destructor called, constructor called, destructor called, 
B)  constructor called, constructor called, 
C)  constructor called, constructor called, destructor called, destructor called, 
D)  Nothing. 
A)  constructor called, destructor called, constructor called, destructor called, 
B)  constructor called, constructor called, 
C)  constructor called, constructor called, destructor called, destructor called, 
D)  Nothing.

Question 6

The assignment operator (=) can be used to:

Accepted Answer

A)  Test for equality. 
B)  Copy data from one object to another. 
C)  Compare two objects. 
D)  Copy a class. 
A)  Test for equality. 
B)  Copy data from one object to another. 
C)  Compare two objects. 
D)  Copy a class.

Question 7

Assume that t is an object of class Test, which has member functions a(), b(), c() and d(). If the functions a(), b() and c() all return references to an object of class Test (using the dereferenced this pointer) and function d() returns void, which of the following statements will not produce a syntax error:

Accepted Answer

A)  t.a().b().d(); 
B)  a().b().t; 
C)  t.d().c(); 
D)  t.a().t.d(); 
A)  t.a().b().d(); 
B)  a().b().t; 
C)  t.d().c(); 
D)  t.a().t.d();

Question 8

Assuming the following constructor is provided for class Time explicit Time(int = 0, int = 0, int = 0);
Which of the following is not a valid way to initialize a Time object?

Accepted Answer

A)  Time t1; 
B)  Time t2{22, 40}; 
C)  Time t3(22, 40); 
D)  a), b) and c) are all valid ways to initialize a Time object. 
A)  Time t1; 
B)  Time t2{22, 40}; 
C)  Time t3(22, 40); 
D)  a), b) and c) are all valid ways to initialize a Time object.

Question 9

Static data members of a certain class:

Accepted Answer

A)  Can be accessed only if an object of that class exists. 
B)  Cannot be changed, even by objects of the same that class. 
C)  Have class scope. 
D)  Can only be changed by static member functions. 
A)  Can be accessed only if an object of that class exists. 
B)  Cannot be changed, even by objects of the same that class. 
C)  Have class scope. 
D)  Can only be changed by static member functions.

Question 10

Which of the following is not true of a constructor and destructor of the same class?

Accepted Answer

A)  They both have the same name aside from the tilde (~) character. 
B)  They are both usually called once per object created. 
C)  They both are able to have default arguments. 
D)  Both are called automatically, even if they are not explicitly defined in the class. 
A)  They both have the same name aside from the tilde (~) character. 
B)  They are both usually called once per object created. 
C)  They both are able to have default arguments. 
D)  Both are called automatically, even if they are not explicitly defined in the class.

Question 11

Inside a function definition for a member function of an object with data member x, which of the following is not equivalent to this->x:

Accepted Answer

A)  *this.x 
B)  (*this).x 
C)  x 
D)  None of the above are equivalent. 
A)  *this.x 
B)  (*this).x 
C)  x 
D)  None of the above are equivalent.

Question 12

Utility functions:

Accepted Answer

A)  Are private member functions that support operations of the class's other member functions. 
B)  Are part of a class's interface. 
C)  Are intended to be used by clients of a class. 
D)  Are a type of constructor. 
A)  Are private member functions that support operations of the class's other member functions. 
B)  Are part of a class's interface. 
C)  Are intended to be used by clients of a class. 
D)  Are a type of constructor.

Question 13

A default constructor:

Accepted Answer

A)  Is a constructor that must receive no arguments. 
B)  Is the constructor generated by the compiler when no constructor is provided by the programmer. 
C)  Does not perform any initialization. 
D)  Both (a) and (b). 
A)  Is a constructor that must receive no arguments. 
B)  Is the constructor generated by the compiler when no constructor is provided by the programmer. 
C)  Does not perform any initialization. 
D)  Both (a) and (b).

Question 14

Returning references to non-const, private data:

Accepted Answer

A)  Allows private functions to be modified. 
B)  Is only dangerous if the binary scope resolution operator (::) is used in the function prototype. 
C)  Allows private member variables to be modified, thus "breaking encapsulation." 
D)  Results in a compiler error. 
A)  Allows private functions to be modified. 
B)  Is only dangerous if the binary scope resolution operator (::) is used in the function prototype. 
C)  Allows private member variables to be modified, thus "breaking encapsulation." 
D)  Results in a compiler error.

Question 15

Every object of the same class:

Accepted Answer

A)  Gets a copy of every member function and member variable. 
B)  Gets a copy of every member variable. 
C)  Gets a copy of every member function. 
D)  Shares pointers to all member variables and member functions. 
A)  Gets a copy of every member function and member variable. 
B)  Gets a copy of every member variable. 
C)  Gets a copy of every member function. 
D)  Shares pointers to all member variables and member functions.

Question 16

Which of the following statements will not produce a syntax error?

Accepted Answer

A)  Defining a const member function that modifies a data member of the object. 
B)  Invoking a non-const member function on a const object. 
C)  Declaring an object to be const. 
D)  Declaring a constructor to be const. 
A)  Defining a const member function that modifies a data member of the object. 
B)  Invoking a non-const member function on a const object. 
C)  Declaring an object to be const. 
D)  Declaring a constructor to be const.

Question 17

A client changing the values of private data members is:

Accepted Answer

A)  Only possible by calling private member functions. 
B)  Possible using public functions and references. 
C)  Never possible. 
D)  Only possible if the private variables are not declared inside the class. 
A)  Only possible by calling private member functions. 
B)  Possible using public functions and references. 
C)  Never possible. 
D)  Only possible if the private variables are not declared inside the class.

Question 18

A class-scope variable hidden by a block-scope variable can be accessed by preceding the variable name with the class name followed by:

Accepted Answer

A)  :: 
B)  : 
C)  . 
D)  -> 
A)  :: 
B)  : 
C)  . 
D)  ->

Question 19

Which of the following is not true of a destructor?

Accepted Answer

A)  It performs termination housekeeping. 
B)  It is called before the system reclaims the object's memory. 
C)  If the programmer does not explicitly provide a destructor, the compiler creates an "empty" destructor. 
D)  It releases the object's memory. 
A)  It performs termination housekeeping. 
B)  It is called before the system reclaims the object's memory. 
C)  If the programmer does not explicitly provide a destructor, the compiler creates an "empty" destructor. 
D)  It releases the object's memory.

Question 20

Which of the following statements is false?

Accepted Answer

A)  You can overload a classes constructors. 
B)  There is no mechanism in C++ for a constructor to call another constructor in the same class. 
C)  Just as a constructor can call a class's other member functions to perform tasks, C++11 allows constructors to call other constructors in the same class. 
D)  To overload a constructor, provide in the class definition a prototype for each version of the constructor, and provide a separate constructor definition for each overloaded version. 
A)  You can overload a classes constructors. 
B)  There is no mechanism in C++ for a constructor to call another constructor in the same class. 
C)  Just as a constructor can call a class's other member functions to perform tasks, C++11 allows constructors to call other constructors in the same class. 
D)  To overload a constructor, provide in the class definition a prototype for each version of the constructor, and provide a separate constructor definition for each overloaded version.

Exam 9: Classes: a Deeper Look; Throwing Exceptions

The type of function a client would use to check the balance of a bank account would be:

Parameterized stream manipulator setfill specifies the fill character that's displayed when an output is displayed in a field wider than the number of characters or digits in the output. The effect of setfill applies:

A class's functions can throw exceptions, such as __________to indicate invalid data.

Which of the following statements about friend functions and friend classes is false?

Given the class definition: class CreateDestroy { Public: CreateDestroy() {cout << "constructor called, ";} ~CreateDestroy() {cout << "destructor called, ";} }; What will the following program output? Int main() { For (int i = 1; i <= 2; ++i) { CreateDestroy cd; } Return 0; }

The assignment operator (=) can be used to:

Assuming the following constructor is provided for class Time explicit Time(int = 0, int = 0, int = 0); Which of the following is not a valid way to initialize a Time object?

Static data members of a certain class:

Which of the following is not true of a constructor and destructor of the same class?

Inside a function definition for a member function of an object with data member x, which of the following is not equivalent to this->x:

Utility functions:

A default constructor:

Returning references to non-const, private data:

Every object of the same class:

Which of the following statements will not produce a syntax error?

A client changing the values of private data members is:

A class-scope variable hidden by a block-scope variable can be accessed by preceding the variable name with the class name followed by:

Which of the following is not true of a destructor?

Which of the following statements is false?

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

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

Class String and String Stream Processing

Bits, Characters, C Strings and Structs

Other Topics

C++11 Additional Features

Filters