PLTW APP Creators Summative Exam

1. An app in App Inventor should display the name of every 5th student in a class of 20 starting with the 5th student. What should the from, to, and by parameters be?

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1. 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

• Dictates the code to the Driver

1. 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

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

Which of the following components can be used to trigger an event handler when the device is shaken?

• Location sensor

• Accelerometer sensor

• Clock

• Spinner

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

• Variables

• Procedures

• Data bases

• For Loops

Which of the following computational items can be used to reduce the redundancy of code the most and make the program shortest?

• Variable

• Event handler

• Data base

• For Loop

To add a button to a screen in App Inventor, where would the Button component be dragged to?

• Designer view

• Blocks viewer

• Properties pane

• media drawer

To program a Button component in App Inventor, where would the code be added?

• Designer View

• Blocks Viewer

• Properties pane

• Media Drawer

Which of the following algorithms would move the arrow from the Start block, through the grey outlined path on the maze, to the End block? Note that the turnLeft and turnRight turn the arrow in place – they do not advance the arrow forward!

• moveForward - 4 blocks

  turnRight

  moveForward - 6 blocks

  turnLeft

  moveForward - 6 blocks

• moveForward - 2 blocks

  turnRight

  moveForward - 2 blocks

  turnLeft

  moveForward - 3 blocks

  turnRight

  moveForward – 4 blocks

  turnLeft

  moveForward – 2 blocks

• moveForward - 2 blocks

  turnRight

  moveForward – 2 blocks

  turnLeft

  moveForward – 2 blocks

  turnRight

  moveForward – 4 blocks

  turnLeft

  moveForward – 4 block

• moveForward - 2 blocks

  turnRight

  moveForward – 2 blocks

  turnLeft

  moveForward – 6 blocks

  turnRight

  moveForward – 2 blocks

  turnLeft

  moveForward – 4 blocks

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

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