Question

1.If you have defined a class,  SavingsAccount, with a public  static method,  getNumberOfAccounts, and created a  SavingsAccount object referenced by the variable  account20, which of the following will call the  getNumberOfAccounts method?

	a. account20.getNumberOfAccounts();
	b. SavingsAccount.account20.getNumberOfAccounts();
	c. SavingsAccount.getNumberOfAccounts();
	d. getNumberOfAccounts();
	e. a & c
	f. a & b

2.In the following class, which variables can the method printStats use? (Mark all that apply.)

public class Item
{
public static int amount = 0;
private int quantity;
private String name;

public Item(String inName, int inQty)
{
name = inName;
    quantity = inQty;
  amount += quantity ;
}

public static void printStats()
{
**** Java code in this method *****
}

}

:	a. inQty
	b. inName
	c. name
	d. quantity
	e. amount

Answer 1

SOL:

1) The correct answers are

a) account20.getNumberOfAccounts();

c) SavingsAccount.getNumberOfAccounts();

d) getNumberOfAccounts();

Explanation:

we can call static method in java without object refference

we can also call static method in java with object refference also

we can also call static method directly from class like in option c

2) The variables used by printStats method is

amount

option e is correct answer

Explanation:

we can not access non static variables name,quantity,inName,inQty from the static method printStats