Chapter 9

Question 1

what is a method

Answer 1

a module that contains a series of statements to carry out a task

Question 2

what are 3 things you can do with a module

Answer 2

• invoke or call a method from another program/method

-any programs can contain an unlimited number of methods and a method can be called an unlimited number of times

-calling a program/method is called the method’s client

Question 3

what are the parts of a method

Answer 3

method header - name/declaration/definition of method

method body - contains implementation (statements that carry out the tasks)

method return statement - returns to the calling method

Question 4

what are local/global variables

Answer 4

local - declared in a method
global - known to all program modules

Question 5

when you call a method from a program, what 4 things must you know?

Answer 5

what the method does

name of the method

type of info to sent to the method

type of return data to expect from the method

Question 6

what are arguments

Answer 6

pass a data item into a method from a calling program

Question 7

what are parameters

Answer 7

how the method receives the data item

Question 8

when a method receives a parameter, you must provide a parameter list that includes

Answer 8

the type of the parameter

the local name for the parameter

Question 9

what is a signature

Answer 9

the method’s name and parameter list

Question 10

what is passed by value

Answer 10

a copy of a value is sent to the method and stored in a new memory location accessible to the method

Question 11

each time a method executes, parameter variables listed in the method header are ____

Answer 11

redeclared

Question 12

to create a method with multiple parameters,

Answer 12

separate the arguments by a comma within a method call

list the data type and local identifier for each parameter within method header’s parentheses, separating each parameter with a comma

Question 13

what are sent arguments called

Answer 13

actual parameters

Question 14

what are variables that accept the parameters in the method called

Answer 14

formal parameters

Question 15

what does going out of scope means

Answer 15

a variable declared within a method ceases to exist when the method ends

Question 16

to retain a value that exists when a method ends, what do you have to do

Answer 16

return the value from the method back to the calling method

Question 17

when a method returns a value, the method must have a __

Answer 17

return type that matches the data type of the value that is returned

Question 18

what does a return type (AKA method type) for a method do

Answer 18

indicates the data type of the value that the method will send back

Question 19

what do you do when you want a method to return nothing

Answer 19

return type void

EX: Void method

Question 20

although you are allowed to include multiple return statements in a method, its not recommended. Why?

Answer 20

because it violates structured logic ( there is only supposed to be one way in and one way out)

Question 21

what is overhead

Answer 21

the extra resources and time required by an operation

Question 22

how do you pass a single array element to a method

Answer 22

the same method to pass a variable to a method

Question 23

how do you pass an entire array as an argument

Answer 23

indicate that the method parameter must be in a array (put square brackets after data type)

the arrays are then passed by reference (the method receives the actual memory address of the array and has access to it)

Question 24

what is overloading a method

Answer 24

several methods that have the same name but are doing different tasks

Question 25

what is polymorphism

Answer 25

the ability of a method to act appropriately according to the context

Question 26

what is an ambiguous methods

Answer 26

situations in which the compiler cannot determine which method to use