Summative Assessment - App Creators

What is the file extension for the programs in App Creators?

• .aia

• .com

• .hex

• .html

There are certain criteria for naming your projects (programs) in MIT App Inventors. Which program name would you not be able to name your project?

• Calculator App

• My_Cat_Program

• DrawingFile

• Game_TimeProgram

In App Inventor, events are programmed using event handlers. What are event handlers?

• The period when a program is running.

• The layer of an app that contains the program that tells the app how to behave.

• In a program, an event that is triggered by user interaction with the user interface.

• A block of code that is triggered when a certain event happens.

Which of the following event handlers will play an audio file when a check box is clicked in App Inventor? (Read carefully)

• 
• 
• 
• 

Which of the following best describes the role of the navigator in pair programming?

• Controls the keyboard

• Helps point out coding errors to the driver

• Controls the mouse

• Waits for their turn

What does this block of code do?

• When the MeaslesButton is clicked, if the Measles audio file is playing, the Meningitis audio file will begin playing also.

• When the MeaslesButton is clicked, if the Measles audio file is playing, it will pause, else the Measles audio file will begin playing.

• When the MeningitisButton is clicked, the Measles and Meningitis audio files will start playing.

• When the MeaslesButton is clicked, if the Measles audio file is playing, the Measles audio file will stop.

Which of the following computational items is used to temporarily store values in a program?

• Variables

• Procedures

• Databases

• For loops

When creating a program, how does the use of comments help debug problems later?

• Comments show where a bug is located in the code

• Comments enable and disable code in the program

• Comments describe the purpose and desired outcome of the code

• Comments include code that the program can execute when it runs into errors

What is the purpose of the hint feature in a TextBox?

• To give the user an indication as to what to type in

• To let the programmer know they have made an error

• To debug a program

• To warn the user that there are bugs in the program

Which is true about the given flowchart?

• If A is true, then C will be performed.

• If A is true, then B will be performed.

• If A is false, then B will be performed.

• B or C will never be performed in this flowchart.