Question 1

If Americans are objects of the same class, which of the following attributes would most likely be represented by a static variable of that class?

Accepted Answer

A)  Age. 
B)  The President. 
C)  Place of birth. 
D)  Favorite food. 
A)  Age. 
B)  The President. 
C)  Place of birth. 
D)  Favorite food. B

Question 2

If the line:
Friend class A;
Appears in class B, and the line:
Friend class B;
Appears in class C, then:

Accepted Answer

A)  Class A is a friend of class C. 
B)  Class A can access private variables of class B. 
C)  Class C can call class A's private member functions. 
D)  Class B can access class A's private variables. 
A)  Class A is a friend of class C. 
B)  Class A can access private variables of class B. 
C)  Class C can call class A's private member functions. 
D)  Class B can access class A's private variables. B

Question 3

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); A

Question 4

Which of the following are true about an abstract data type?
I. Captures a data representation.
II. Defines the operations that are allowed on its data.
III. Replaces structured programming.

Accepted Answer

A)  I, II and III. 
B)  I and II. 
C)  I and III. 
D)  II and III. 
A)  I, II and III. 
B)  I and II. 
C)  I and III. 
D)  II and III.

Question 5

When composition one object having another object as a member) is used:

Accepted Answer

A)  The host object is constructed first and then the member objects are placed into it. 
B)  Member objects are constructed first, in the order they appear in the host constructor's initializer list. 
C)  Member objects are constructed first, in the order they are declared in the host's class. 
D)  Member objects are destructed last, in the order they are declared in the host's class. 
A)  The host object is constructed first and then the member objects are placed into it. 
B)  Member objects are constructed first, in the order they appear in the host constructor's initializer list. 
C)  Member objects are constructed first, in the order they are declared in the host's class. 
D)  Member objects are destructed last, in the order they are declared in the host's class.

Question 6

For a non-constant member function of class Test, the this pointer has type:

Accepted Answer

A)  const Test * 
B)  Test * const 
C)  Test const * 
D)  const Test * const 
A)  const Test * 
B)  Test * const 
C)  Test const * 
D)  const Test * const

Question 7

Which of the following is not true about friend functions and friend classes?

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 8

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

Accepted Answer

A)  *this.x 
B)  *this).x 
C)  x 
D)  * & *this) ) ).x 
A)  *this.x 
B)  *this).x 
C)  x 
D)  * & *this) ) ).x

Question 9

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 10

Which of the following is not an abstract data type?

Accepted Answer

A)  An int. 
B)  A user-defined class. 
C)  A for loop. 
D)  None of the above are abstract data types. 
A)  An int. 
B)  A user-defined class. 
C)  A for loop. 
D)  None of the above are abstract data types.

Question 11

Increment i )
{
Count = c;
}
Does not cause any compilation errors. This tells you that:

Accepted Answer

A)  count must be a non-const variable. 
B)  count must be a const variable. 
C)  increment must be a non-const variable. 
D)  increment must be a const variable. 
A)  count must be a non-const variable. 
B)  count must be a const variable. 
C)  increment must be a non-const variable. 
D)  increment must be a const variable.

Question 12

An error occurs if:

Accepted Answer

A)  A non-reference, non-const, primitive data member is initialized in the member initialization list. 
B)  An object data member is not initialized in the member initialization list. 
C)  An object data member does not have a default constructor. 
D)  An object data member is not initialized in the member initialization list and does not have a default constructor. 
A)  A non-reference, non-const, primitive data member is initialized in the member initialization list. 
B)  An object data member is not initialized in the member initialization list. 
C)  An object data member does not have a default constructor. 
D)  An object data member is not initialized in the member initialization list and does not have a default constructor.

Question 13

Static member functions:

Accepted Answer

A)  Can use the this pointer. 
B)  Can access only other static member functions and static data members. 
C)  Cannot be called until an object of their class is instantiated. 
D)  Can be declared const as well. 
A)  Can use the this pointer. 
B)  Can access only other static member functions and static data members. 
C)  Cannot be called until an object of their class is instantiated. 
D)  Can be declared const as well.

Question 14

The numbers 3, 2, 5, 7 are enqueued in a queue in that order, then three numbers are dequeued, and finally 3, 7, 9, 4 are enqueued in that order. What is the first number in the queue the next number to be dequeued)?

Accepted Answer

A)  3 
B)  7 
C)  9 
D)  4 
A)  3 
B)  7 
C)  9 
D)  4

Question 15

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.

Exam 10: Classes: a Deeper Look, Part 2

If Americans are objects of the same class, which of the following attributes would most likely be represented by a static variable of that class?

If the line: Friend class A; Appears in class B, and the line: Friend class B; Appears in class C, then:

Which of the following are true about an abstract data type? I. Captures a data representation. II. Defines the operations that are allowed on its data. III. Replaces structured programming.

When composition one object having another object as a member) is used:

For a non-constant member function of class Test, the this pointer has type:

Which of the following is not true about friend functions and friend classes?

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

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

Which of the following is not an abstract data type?

Increment i ) { Count = c; } Does not cause any compilation errors. This tells you that:

An error occurs if:

Static member functions:

The numbers 3, 2, 5, 7 are enqueued in a queue in that order, then three numbers are dequeued, and finally 3, 7, 9, 4 are enqueued in that order. What is the first number in the queue the next number to be dequeued)?

Static data members of a certain class:

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