CSCI 120 Written Final!!!!

Relationship between methods in java to methods and functions in Alice

Accessor method - Alice function. Mutator method - Alice Method

What is the return type of a constructor?

Constructors do not have a return type! (NOT NULL!)

Except for the begin() method, every other event handler within WindowController accepts a parameter. What is the type of the parameter?

Location

Overloaded

Refers to two methods with the same name, but different formal parameter lists

if you define a class named SportsCar, what must be the name of the constructor?

SportsCar

If the condition of a while loop is always false:

The body of the loop will never execute

T/F Canvas is defined for us by the WindowController

True

The condition of an if statement can be:

a Boolean variable, a Boolean function call (that is, a method that returns a boolean), or a boolean expression

the construct "doTogether" is

a control statement

instance method

a method inside an object that operates on an object

formal parameter

a variable declaration in a method's definition that allows the method to accept values from the caller

instance variable

a variable inside an object that makes up part of its internal state

final

a variable modifier that indicates that the variable cannot be changed

Return statements must appear in

accessor methods

Methods:

allow you to hide complex details with abstraction, allow you to use divide and conquer methodology to break a large problem into smaller pieces, are a way to give name to a block of code

this

an implicit variable that refers to the object that is currently executing a method

relationship between classes and objects

and object is an instance of a class

a property variable provides you a place to store an object ______

attribute

A _______ variable can serve as a condition in an if or while statement

boolean

what is the return type of the contains method defined for shapes in the ObjectDraw library?

boolean

3+4 < 3*8 is a

boolean expression

myRect.contains(myPoint) is a

boolean expression

the condition of a while loop must be a:

boolean expression

correct way to access the width of the canvas

canvas.getWidth()

When defining one of the mouse event handlers, we can:

choose whatever name we like for the parameter variable

the items in the Alice gallery are

classes

constructor

code that is executed when an object is created

in programming, combining two strings a and b into a single string ab is called _________

concatenating

Program decision-making depends on

conditions

what is an equivalent statement to count++;

count = count +1;

T/F Objects drawn later in your program's execution will appear behind objects drawn earlier in the program

false

T/F When the flow of control reaches an if statement, it is possible that both the if part and the else part will be executed

false

T/F a method name should usually be a noun or noun phrase

false

T/F an Alice method produces a value

false

If you forget to update the condition inside the body of a counting loop:

infinite loop

to use the object draw library in a program, include a line before the class definition:

inport object draw.*;

property variable

long term storage of a value related to an object

a ______ is an invisible location in your world that has a position and an orientation

marker

a local variable lets you store a value within a(n) ______ for later use

method

in a user story, the verbs correspond to

methods

return statements:

must match the return type of the method, send a value back to the caller of the method, stop the execution of a method immediately, can include a complex expression of method invocation, can appear in a method with void return type as long as no expression follows the keyword return

A loop inside a loop is said to be

nested

Two methods with the same name and formal parameter lists, but different return values are:

not allowed

3+4 / 2 *8 is a

numeric expression

myRect.getWidth() is a

numeric expression

in a user story, the nouns correspond to

objects

A _______ is a variable that stores an argument

parameter

When writing a class that will create visible objects, we can access the canvas by

passing a DrawingCanvas into the Constructor as a parameter

to define a constant:

private final static int MY_NUMBER;

the value the function produces is whatever appears in the function's ___________

return statement

in Alice, methods stored in the scene are called _____ methods

scene

You can use De Morgan's laws to

simplify boolean expressions

assume your program has correctly created a FramedRect named square. The correct expansion to determine if a point is within the square is

square.contains(point)

a method-message can only resent from a place where a(n) _______ can appear

statement

"hello" + "world" is a

string expression

method (local) variable

temporary storage for a value only within a single method call

If the condition of a while loop is always true:

the loop will repeat forever (infinite loop)

encapsulation

the process of enclosing programming elements inside larger, more abstract entities

computer science is most accurately described as

the processing of info by algorithms

T/F Literals, variable names, constructions, and invocations of accessor methods can all be used as expressions

true

T/F functions can have parameters to store arguments passed by the sender of the message

true

T/F you may define a function in Alice

true

parameter

used to pass a value into a method

a function-message must be sent from a place where a(n) _____ can appear

value

a(n) __________ is a name that refers to a piece of the program's memory, in which a value can be stored, retrieved, and changed

variable

mutator methods usually have this return type

void