Chapter 10, Problem 3RE

a.

Explanation of Solution

c = i;

The given statement requires a cast.

Explanation:

• An object of a class can be referred by the reference of an interface which is implemented by the class.
• When the programmer stores an object in an interface reference, it is necessary to cast from interface to classes.
• The cast notation is used to cast from interfaces to classes...

b.

Explanation of Solution

j= c;

The given statement does not require a cast.

Explanation:

• When the programmer stores an object in an interface reference, it is necessary to cast from interface to classes.
• The cast notation is used to cast from interfaces to classes...

c.

Explanation of Solution

i = j;

The given statement requires a cast.

Explanation:

• An object of a class can be referred by the reference of an interface which is implemented by the class.
• When the programmer stores an object in an interface reference, it is necessary to cast from interface to classes.
• The cast notation is used to cast from interfaces to classes...