Question 1

Which of the following are legal access to the class or struct members? Assume each is outside of the class member definitions,
struct S class C class D
{ { {
int x;int x;public:
int y;int y;int x;
} private: int y;
S s;int z;private:
};int z;
C c;};
D d;
a)s.x
b)c.x
c)d.x
d)c.z
e)d.z

Accepted Answer

The answer of Which of the following are legal access...

Question 2

Describe the differences between a call to an inline function member and a function that is not declared inline..What advantages are there to inline? What disadvantages?

Accepted Answer

The answer of Describe the differences between a call to...

Question 3

A constructor
A)can only be used to initialize
B)must initialize all member variables
C)can do anything any other method can do.
D)usually initializes all,or most,member variables

Accepted Answer

A constructor can perform any operations like other methods, including initializing member variables, but it is not limited to just initialization (C). It is common practice for constructors to initialize most or all member variables, but this is not a strict requirement (D). Constructors do not have to initialize all member variables (B), and they are not limited to only initialization tasks (A).

Question 4

Describe in terms of who needs access to class members why the public members should come first in a class definition.

Accepted Answer

The answer of Describe in terms of who needs access...

Question 5

Given the definitions below.Rewrite the definition of this class so that functions f()const and g(const A& x)are inline.
const int x = 17;
class A
{
public:
A( );
A(int n);
int f( )const;
int g(const A& x);
private:
int i;
};

Accepted Answer

The answer of Given the definitions below.Rewrite the definition of...

Question 6

Suppose you have a class whose objects are very,very large.Briefly,describe the advantages and drawbacks of call-by-value and call-by-reference for large objects.Describe a parameter passing mechanism that will allow the safety of call-by-value and the efficiency of call-by-reference.

Accepted Answer

The answer of Suppose you have a class whose objects...

Question 7

Explain why data members,in particular should be placed in the private section of a class.

Accepted Answer

The answer of Explain why data members,in particular should be...

Question 8

Which of the following are accurate comparisons between call-by-value and const call-by-reference?
A)Both protect against changing the caller's argument.
B)Both are very fast for all sizes of objects.
C)Call-by-value copies the argument whereas const call-by-reference does not
D)Call by value uses more memory than const call-by-reference in making the copy.

Accepted Answer

A) Both call-by-value and const call-by-reference prevent the modification of the caller's argument. 
C) In call-by-value, a copy of the argument is made and passed to the function, whereas in const call-by-reference, a reference to the original argument is passed, and no copy is made.

Question 9

A class member that is to be shared among all objects of a class is called
A)A const member
B)A reference member
C)A static member.
D)A value member
E)A function member

Accepted Answer

A static member is a class member that belongs to the class, rather than to an instance of the class. It is shared among all objects of the class. With the static keyword, we can declare static data members and static member functions in a class. Thus, C is the correct choice.

Option A, a const member, is a member variable that cannot be changed after initialization. This does not necessarily mean that it is shared among all objects of a class.

Option B, a reference member, is a member variable that refers to an object during its initialization and cannot be made to refer to another object later. Again, this does not necessarily mean that it is shared among all objects of a class.

Option D, a value member, is not a commonly used term in object-oriented programming.

Option E, a function member, refers to member functions of a class. Although they can be shared among all objects of a class, they are not a class member that is to be shared among all objects of a class.

Question 10

Why is it an error to add a const modifier,as shown to the declaration for the member function input given here?
class BankAccount
{
public:
void input( )const;
// other members
};

Accepted Answer

The answer of Why is it an error to add...

Question 11

What is a default constructor? When does a class not have a default constructor?

Accepted Answer

The answer of What is a default constructor? When does...

Question 12

If we use an out of range index with a vector,there be an error message from the compiler.

Accepted Answer

Accessing a vector with an out-of-range index does not cause a compile-time error; it leads to undefined behavior at runtime. The compiler does not check for out-of-range access for vectors.

Quiz 7: Constructors and Other Tools

Which of the following are legal access to the class or struct members? Assume each is outside of the class member definitions, struct S class C class D { { { int x;int x;public: int y;int y;int x; } private: int y; S s;int z;private: };int z; C c;}; D d; a)s.x b)c.x c)d.x d)c.z e)d.z

Describe the differences between a call to an inline function member and a function that is not declared inline..What advantages are there to inline? What disadvantages?

A constructor

Describe in terms of who needs access to class members why the public members should come first in a class definition.

Given the definitions below.Rewrite the definition of this class so that functions f()const and g(const A& x)are inline. const int x = 17; class A { public: A( ); A(int n); int f( )const; int g(const A& x); private: int i; };

Suppose you have a class whose objects are very,very large.Briefly,describe the advantages and drawbacks of call-by-value and call-by-reference for large objects.Describe a parameter passing mechanism that will allow the safety of call-by-value and the efficiency of call-by-reference.

Explain why data members,in particular should be placed in the private section of a class.

Which of the following are accurate comparisons between call-by-value and const call-by-reference?

A class member that is to be shared among all objects of a class is called

Why is it an error to add a const modifier,as shown to the declaration for the member function input given here? class BankAccount { public: void input( )const; // other members };

What is a default constructor? When does a class not have a default constructor?

If we use an out of range index with a vector,there be an error message from the compiler.