Refer to the Java classes below:

public class BankAccount { private double myBalance; public BankAccount() { myBalance = 0; } public BankAccount(double Balance) { myBalance = balance; } public void deposit (double amount) { myBalance += amount; } public double getBalance() { return myBalance; } } public class SavingsAccount extends BankAccount { private double myInterestRate; public SavingsAccount() { /* implementation not shown */ } public SavingsAccount(double balance, double rate) { /* implementation not shown */ } public void addInterest() { /* implementation not shown */ } }

Of the methods shown, how many different nonconstructor methods can be invoked by a SavingsAccount Object?

Select one:

a. 1

b. 2

c. 3

d. 4

2.

Assume that the following Prolog program has been consulted.

a(B,B).

Determine the output of the following query and enter in the answer blank.

?- a(1,B), a(B,C), (C,D), a(D,10).

Answer:

3.

Which of the following represents the best reason to use tail recursion?

Select one:

a. the recursive call can be optimized away by a modern compiler

b. It makes recursive functions more efficient than loops

c. It eliminates the need for stack frames

d. It makes the code simpler