In an event driven programming environment, such as App Inventor, _________.

programming statements can be used to respond to events

What would happen when resetScore() is called?

The global variable score would be set to 0.

What will happen when the device is shaken?

It will hide the SheepButton and show the ResetButton.

Consider this if/else block. What will happen if X is equal to 10 and Y is equal to 11?

Text in Label1 will be set to Lesser.

A data type consisting of true or false values

What will happen in this program if the SheepButton is clicked?

It will play BaaSound & it will vibrate for 1 second

Which of these is the best explanation of pseudocode?

Pseudocode is a language that represents concepts, but can't actually run.

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MIT App Inventor Midterm Review

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Questions 21

Answers

1
What type of block is resetScore?
An event controller
A procedure block
A control block
An event handler
2
If a program has to make a decision and select between multiple events which statement should you use?
Do While
If- Then
When
If-Then-Else
3
In an event driven programming environment, such as App Inventor, _________.
events happen according to a calendar stored in the program
an if/else statement would be an example of an event
programming statements can be used to respond to events
setting the value of a variable is an example of an event
4
In this picture, what type of block is the If/else block?
A repetition (loop) back
A variable setter
A selection block
An event handler
5
What blocks activate commands when a particular event happens?
event handlers
when block
procedures
properties
6
In Computer Science, the process of abstracting also means _________________.
condensing
simplifying
complicating
elaborate
7
What would happen when resetScore() is called?
The global variable score would cause the program to crash.
The global variable score would be removed from memory.
The global variable score would be set to 0.
The global variable score restarts the program.
8
What will happen when the device is shaken?
It will show the SheepButton and hide the ResetButton.
It will hide the SheepButton and hide the ResetButton.
It will hide the SheepButton and show the ResetButton.
It will show the SheepButton and show the ResetButton.
9
Which sensor would you use to determine the location of a nearby library?
An Accelerometer Sensor
A Clock
An Orientation Sensor
A Location Sensor
10
1001 0011 passes the even bit parity test
True
False
11
If you needed a program to remember the score of your game, which code blocks should you use?
If-Then
Label
Text Box
Global Variable
12
What is the proper notation for the 8 bits in binary code?
64, 32, 16, 8, 4, 2, 0
128, 64, 32, 16, 8, 4, 2, 1
1, 2, 3, 4, 5, 6, 7, 8
2, 4, 8, 16, 32, 64, 128, 256
13
Consider this if/else block. What will happen if X is equal to 10 and Y is equal to 11?
The text in Label1 will not change.
Text in Label1 will be set to Lesser.
None of the above.
Text in Label1 will be set to Greater.
14
What does concatenate mean?
Find letters in a string
Cut off letters at the beginning and ending of a string
Join letters of a string
Tokenize out letters in a string
15
What type of block is Button1.Click?
A control block
An event controller
A procedure call block
An event handler
16
What is boolean?
A data type consisting of nondecimal numerical values
A data type consisting of 1's and 0's
A data type consisting of decimal numerical values
A data type consisting of true or false values
17
What will happen in this program if the SheepButton is clicked?
It will play BaaSound & it will vibrate for 1 second
Nothing. There is a code error.
It will play the BaaSound & it will vibrate for 1 minute.
It will play BaaSound then it will vibrate for 10 seconds
18
Which is the best name for a label that is used to display the home team score?
HaHomeScore
LblHomeScore
TxbHomeScore
CnvHomeScore
19
If a program has to make a decision and select between two events, which statement should you use?
If-Then-Else
When
If-Then
Do While
20
Which of these is the best explanation of pseudocode?
Pseudocode is the language that runs the fastest on computers.
Pseudocode is a language that represents concepts, but can't actually run.
Pseudocode is a programming language that looks just like natural human lan
A standard programming language that is understood by all computers.
21
An abstraction is a ____ representation that stands for some collection of individual instances
artistic
general
fixed
specific

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