Using Methods

Question 1

A sequence of operations that a computer program can execute on demand

Answer 1

Method

Question 2

An executable statement that tells the computer to transfer execution to the method body

Answer 2

Method call

Question 3

Datum that is passed to a method when it is called

Answer 3

Argument

Question 4

Datum given back by a method when it returns from a call

Answer 4

Return value

Question 5

What we call a method when it calls another

Answer 5

Caller

Question 6

What is an executable statement that transfers execution to the method body?

Answer 6

Method call

Question 7

What is a declaration that gives the information you need to use a method?

Answer 7

Method specification

Question 8

What facts should be provided by a method specification?

Answer 8

A description of what it does, the data type of its return value, whether or not its static, the data type of each argument, and its identifier

Question 9

Given the method specification below, which statement correctly calls the method?

double federalTax( double grossPay, int w4allowances )

Answer 9

double tax = federalTax( 1_300, 2 );

Question 10

Given the method specification below, which statement correctly calls the method?

long currentTimeInMilliseconds( )

Answer 10

long time = currentTimeInMilliseconds( );

Question 11

Given the method specification below, which statement correctly calls the method?

double mm( int inches)

Answer 11

double millimeters = mm( 2 );

Question 12

Given the method specification below, which statement correctly calls the method?

void setTime( int hour, int minutes, char meridiem )

Answer 12

setTime( 5, 30, ‘A’ );

• Don’t put the return value when calling the method if its void in the first place

Question 13

double federalTax( double grossPay, int w4allowances )

Given the method specification above, which statement best describes the statement below?

federalTax( 1_300.00, 4 );

Answer 13

It correctly calls the method but loses its return value.

Question 14

A method with the same identifier that has several declarations, each of which takes different arguments, is said to be __________.

Answer 14

Overloaded

Question 15

Given this Spinner class, which Java statement correctly builds a Spinner object? (There are three)

public class Spinner {
     private int low, high, range;
     public int stoppedAt;
     public Spinner( int lo, int hi ) {
          low = lo; high = hi;
          range = (high - low) + 1;
          spin( ); }
     public Spinner ( int hi ) {
          this( 1, hi ); }
     public Spinner( ) {
          this( 10 ); }
     public void spin( ) {
          stoppedAt = (int) (Math.random( ) * range + low) ; 
}}

Answer 15

Spinner s = new Spinner( ); 
Spinner s = new Spinner( 54 ); 
Spinner s = new Spinner( 0, 37 );