In Java, a class can:

a. Extend only one class, and implement multiple interfaces.

b. Extend more than one class and implement multiple interfaces.

c. Extend only one class and implement only one interface.

d. None of the above.

Class A compiles, and has a single constructor that takes a string as parameter.

Class B extends class A. If "super()" is the first statement in the constructor

of class B, then:

a. B's constructor will compile.

b. We need to define a default constructor in class A in order for B's constructor

to compile.

c. We need to remove the "super()" from the class B's constructor for it to compile.

d. None of the above.

The Programmer class defines a method named "implement" that has the following

prototype:

protected String implement(int linesOfCode);

The JavaProgrammer class extends the Programmer class. Which of the following

is the prototype of a method in the JavaProgrammer class that OVERRIDES

the "implement" method of the Programmer class?

a. public String implement(int linesOfCode);

b. private String implement(int linesOfCode);

c. public String implement();

d. a. and b.

e. a. and c.

This question relies on the same information as the previous one. The

Programmer class defines a method named "implement" that has the following

prototype:

protected String implement(int linesOfCode);

The JavaProgrammer class extends the Programmer class. Which of the following

is the prototype of a method in the JavaProgrammer class that OVERLOADS (not

OVERRIDES as in the previous question) the "implement" method of the Programmer

class?

a. public String implement(int linesOfCode);

b. private String implement(int linesOfCode);

c. public String implement();

d. a. and b.

e. a. and c.

We can tell whether two objects belong EXACTLY to the same class by using:

a. The instanceof operator.

b. The getClass() method.

c. a. or b.

d. None of the above.