Deck 3: Events

Question 1

Xerox PARC was established as a research lab where some of the world's best computer scientists and designers could work to improve modern computer technology.

Answer 1

True

Question 2

Local area networks, the laser printer, and the Graphical User Interface (GUI) were all developed or refined at Xerox PARC.

Answer 2

True

Question 3

A command-driven interface has icons on the computer screen and a mouse to control a pointer that can be used to operate the computer.

Answer 3

False

Question 4

Almost any method can serve as an event handler.

Question 5

When an event handler detects an event trigger, an event listener is called into action.

Question 6

There are five different event types in Alice.

Question 7

If an object is facing the positive direction on a straight line (marked with a scale of measurement), toward higher numbers, its orientation would be forward.

Question 8

An object facing the negative direction on a straight line (marked with a scale of measurement), toward lower numbers, would be facing backward.

Question 9

In front of and behind are two object-relative positions.

Question 10

A flat surface is three-dimensional.

Question 11

A flat, two-dimensional surface is called a frame.

Question 12

Cartesian coordinates have an X-axis and a Y-axis.

Question 13

In Cartesian coordinates, the Y-axis value is always listed first.

Question 14

Moving up or down off a flat plane requires a third axis and a third number to indicate how far a point is above or below the plane.

Question 15

The physical world around us is a two-dimensional space.

Question 16

In Alice's Euclidean 3-space, there are six object-relative directions, one opposing pair of directions for each axis.

Question 17

In Alice, there are eight object-relative positions.

Question 18

Whenever the create new event button is clicked, a list of the nine event types in Alice appears.

Question 19

Alice has a When a key is typed event that will cause a method to run whenever a particular key is pressed.

Question 20

The default menu choice in the When a key is typed event tile is number key.

Question 21

You can change the form of the When a key is typed event to make a method run continuously as long as the triggering key is held down.

Question 22

Alice has an event type that will cause a method to run whenever the mouse is clicked on an object.

Question 23

An object in 3D space can move in six different directions: forward, backward, left, right, up, and down.

Question 24

You can frame an individual object, a group of objects, or a particular scene.

Question 25

The specifications of a project usually come from the client, who is the person requesting that the software be written.

Question 26

Before GUIs existed, people had to control a computer by typing commands into what was called a ____.

A) command center
B) text file
C) command-driven interface
D) text interface

Question 27

____ is software in which the flow of the program depends on the occurrence of events outside the software, such as a user pressing a key or clicking a mouse button.

A) Graphics-driven software
B) Event-driven software
C) Object-driven software
D) Command-driven software

Question 28

A(n) ____ occurs whenever an event listener detects an event trigger and responds by running a method called an event handler.

A) event
B) episode
C) exploit
D) incident

Question 29

A(n) ____ is a combination of hardware and software that repeatedly checks the computer system for an event trigger.

A) event listener
B) incident listener
C) episode listener
D) exploit listener

Question 30

A(n) ____ can be any activity or condition selected by the programmer, such as a user clicking a mouse button or pressing the Enter key or a bank account balance going below zero.

A) incident trigger
B) exploit trigger
C) event trigger
D) episode trigger

Question 31

A(n) ____ is a method that is activated when the trigger occurs.

A) exploit handler
B) incident handler
C) episode trigger
D) event handler

Question 32

A(n) ____ is a way of measuring something.

A) extension
B) dimension
C) scale
D) ordered pair

Question 33

We create a dimension whenever we assign a value on a continuous scale to some property. This process is called ____.

A) positioning
B) encapsulation
C) orientation
D) quantification

Question 34

The term ____ refers to the direction an object is facing.

A) positioning
B) orientation
C) encapsulation
D) quantification

Question 35

Location and orientation together are known as the ____ of an object.

A) point of view
B) dimension
C) side effect
D) quantification

Question 36

A direction can be in relation to a scale of measurement, called ____.

A) object-relative direction
B) ordered direction
C) absolute direction
D) event-relative direction

Question 37

A direction can be from the point of view of another object, called ____.

A) object-relative direction
B) ordered direction
C) absolute direction
D) event-relative direction

Question 38

The French mathematician Ren Descartes developed a system of quantification for two dimensions called ____.

A) polar coordinates
B) Cartesian coordinates
C) an Euclidean 3-space
D) an ordered pair

Question 39

A(n) ____ is any pair in which one dimension is always listed first, and another dimension is always listed second.

A) ordered pair
B) Euclidean 3-space
C) relation
D) coordinate

Question 40

A set of numbers showing the temperature at various times throughout the day might be given in the form of ____ with the format (time, temperature).

A) ordered pairs
B) Cartesian coordinates
C) relations
D) polar coordinates

Question 41

A(n) ____ is an unintended result caused by two methods running at the same time.

A) point of view
B) side effect
C) event trigger
D) absolute direction

Question 42

Alice has an event type to let users change the position of an object while a world is running. This event type is ____.

A) When a key is typed
B) When a variable changes
C) Let the mouse move <objects>
D) While the world is running

Question 43

____ is used to angle the camera up or down, just as you might tilt your head up or down.

A) Tilt control
B) Incline
C) Dip control
D) Slant control

Question 44

The term ____ means that the camera moves in closer to get a tighter shot of something, so that it fills more of the screen.

A) zooming in
B) panning in
C) panning out
D) zooming out

Question 45

The term ____ means that the camera moves out farther to get a longer shot of something, so that it becomes smaller on the screen.

A) zooming in
B) panning in
C) panning out
D) zooming out

Question 46

The term ____ means turning the camera left or right without moving the position of the camera.

A) zooming in
B) panning
C) framing
D) zooming out

Question 47

To ____ an object means to position the camera so that the object fills the screen.

A) tilt
B) frame
C) zoom
D) pan

Question 48

There are three Alice events designed to let us manipulate the camera once a world is running: ____.

A) Let the mouse orient the camera
Let the space bar move the camera
Let the arrow keys move the camera
B) Move left
Move up
Move down
C) Let the mouse orient the camera
Let the mouse move the camera
Let the arrow keys move the camera
D) Move left
Move right
Move up

Question 49

The move and turn events have four style parameters: gently, begin gently, end gently, and abruptly. The ____ parameter implies that the movement will be at a constant speed.

A) begin
B) abruptly
C) gently
D) end gently

Question 50

A(n) ____ is often used in professional software development.

A) test plan
B) three-dimensional space
C) frame
D) off-camera