Question 1

App Inventor Development Cycle Steps

Accepted Answer

1. Design/Redesign
2. Create UI
3. Code blocks
4. Test/Debug

Question 2

An event

Accepted Answer

Doing something in the app such as clicking on a button for example.

Question 3

An action

Accepted Answer

A result of the event happening (i.e. press the button (the event) and display a graphic (the action)).

Question 4

IPO

Accepted Answer

Input, Processing, Output

Question 5

Input

Accepted Answer

An input is information that must be received by the app once it starts.

Question 6

Processing

Accepted Answer

Processing is the action the app must perform to obtain the desired result.

Question 7

Output

Accepted Answer

An output is the information that the app must provide to the user.

Question 8

Virtual Machine

Accepted Answer

A recreation of an environment (say the Andriod phone) in another computing environment (say the PC).

Question 9

Algorithm

Accepted Answer

A list of steps written in English that the program will have to perform.

Question 10

Bug

Accepted Answer

An error which stops your code working as expected.

Question 11

Syntax error

Accepted Answer

The rules of the language have been broken, e.g. by mis-spelling a command.

Question 12

Logic error

Accepted Answer

This means your code runs, but doesn't do what you expect.

Question 13

Debugging

Accepted Answer

Finding and fixing the errors in a program.

Question 14

Rubber Duckie

Accepted Answer

The process of talking about what your code SHOULD do while comparing it to what it ACTUALLY does. Note, you don't need a real rubber duckie to do this!

Question 15

Variable

Accepted Answer

A space in a computer's memory where we can hold information used by our program

Question 16

Number variable

Accepted Answer

Can contain whole numbers or decimal numbers

Question 17

String variable

Accepted Answer

Can contain text, characters, or numbers but surrounded by " ".

Question 18

Boolean variable

Accepted Answer

Can contain either true or false.

Question 19

Mathematic operators

Accepted Answer

Perform a calculation. Found in the Math blocks. Examples: add, subtract, multiply, divide, and exponents.

Question 20

Joining strings

Accepted Answer

Can be done with the join block (see ai2 codes)

Question 21

Sprite

Accepted Answer

A 2D image inserted into a larger screen.

Question 22

Procedure

Accepted Answer

Very useful in coding. Eliminates repetitive codes. Lets us break a problem down into smaller problems and solve each one separately.

Question 23

If Block

Accepted Answer

Found under Controls. Allows for one branch. Here's how it works:

If <condition is true>
then do some sort of action (code)

Question 24

Condition

Accepted Answer

A statement that results in either two outcomes (true or false, yes or no, 1 or zero).

Question 25

Conditional Blocks

Accepted Answer

Code blocks that make comparisons - result in a true or false result (Boolean value). Found in Math blocks:

Ex: 3 = 3  TRUE
Ex: 2 > 10  FALSE

Question 26

IF ELSE Block

Accepted Answer

2 way branching. 1 branch is for if the condition is true and the other is for if it is false

Question 27

If - Else if - Else ladder

Accepted Answer

App inventor checks the 1st if Statement and then the else ifStatement if it has to. Finally it will Check the Else statement if The other two are not true!

Question 28

Compound Conditions - AND & OR

Accepted Answer

Used to check if two or more conditions have been met
Example: To get to level 2 the user must kill the boss AND have 100 gold

Question 29

Counted Repetition (For Statement)

Accepted Answer

Used to repeat blocks of code N amount of times.

Question 30

Conditional Loop

Accepted Answer

A conditional loop is used when we don't know in advance how often a process will have to be repeated.

Question 31

List

Accepted Answer

A collection of related data (i.e. high scores) stored to a variable.

Question 32

List index

Accepted Answer

The position of an element in a list The first spot is index 1, the second spot is index 2, etc.

ICS2O1 Strand 2

ICS2O1 Strand 2 App Inventor

Term	Definition
App Inventor Development Cycle Steps	1. Design/Redesign 2. Create UI 3. Code blocks 4. Test/Debug
An event	Doing something in the app such as clicking on a button for example.
An action	A result of the event happening (i.e. press the button (the event) and display a graphic (the action)).
IPO	Input, Processing, Output
Input	An input is information that must be received by the app once it starts.
Processing	Processing is the action the app must perform to obtain the desired result.
Output	An output is the information that the app must provide to the user.
Virtual Machine	A recreation of an environment (say the Andriod phone) in another computing environment (say the PC).
Algorithm	A list of steps written in English that the program will have to perform.
Bug	An error which stops your code working as expected.
Syntax error	The rules of the language have been broken, e.g. by mis-spelling a command.
Logic error	This means your code runs, but doesn't do what you expect.
Debugging	Finding and fixing the errors in a program.
Rubber Duckie	The process of talking about what your code SHOULD do while comparing it to what it ACTUALLY does. Note, you don't need a real rubber duckie to do this!
Variable	A space in a computer's memory where we can hold information used by our program
Number variable	Can contain whole numbers or decimal numbers
String variable	Can contain text, characters, or numbers but surrounded by " ".
Boolean variable	Can contain either true or false.
Mathematic operators	Perform a calculation. Found in the Math blocks. Examples: add, subtract, multiply, divide, and exponents.
Joining strings	Can be done with the join block (see ai2 codes)
Sprite	A 2D image inserted into a larger screen.
Procedure	Very useful in coding. Eliminates repetitive codes. Lets us break a problem down into smaller problems and solve each one separately.
If Block	Found under Controls. Allows for one branch. Here's how it works: If <condition is true> then do some sort of action (code)
Condition	A statement that results in either two outcomes (true or false, yes or no, 1 or zero).
Conditional Blocks	Code blocks that make comparisons - result in a true or false result (Boolean value). Found in Math blocks: Ex: 3 = 3  TRUE Ex: 2 > 10  FALSE
IF ELSE Block	2 way branching. 1 branch is for if the condition is true and the other is for if it is false
If - Else if - Else ladder	App inventor checks the 1st if Statement and then the else ifStatement if it has to. Finally it will Check the Else statement if The other two are not true!
Compound Conditions - AND & OR	Used to check if two or more conditions have been met Example: To get to level 2 the user must kill the boss AND have 100 gold
Counted Repetition (For Statement)	Used to repeat blocks of code N amount of times.
Conditional Loop	A conditional loop is used when we don't know in advance how often a process will have to be repeated.
List	A collection of related data (i.e. high scores) stored to a variable.
List index	The position of an element in a list The first spot is index 1, the second spot is index 2, etc.

"Know" box contains:
Time elapsed:
Retries: