Programming 301

1. Dan misspelled his message in his {"func":"registerBroadcastTrigger","values":[{"type":"string","value":""}]} block. Instead of "gate.open", he typed "gateopen". How will this affect his game?

• The actor will never receive the message and the gate will not open
• The actor will still receive the message
• The actor never receives the message, but the gate will still open
• The actor will send a message instead

2. Which of these blocks is NOT used for handling events?

• {"func":"blockLooksNextCostume"}
• {"func":"registerKeyTrigger","values":[{"type":"choice","value":""}]}
• {"func":"registerTrigger","values":[{"type":"boolean","value":""}]}
• {"func":"blockControlBroadcast","values":[{"type":"string","value":""}]}

3. Which block should you use if you want to send a message to a specific Actor?

• {"func":"blockControlPostMessage","values":[{"type":"string","value":""},{"type":"string","value":""},{"type":"string","value":""}]}
• {"func":"registerTrigger","values":[{"type":"boolean","value":""}]}
• {"func":"registerBroadcastTrigger","values":[{"type":"string","value":""}]}
• {"func":"blockControlBroadcast","values":[{"type":"string","value":""}]}

4. Which block should you use if you want to send a message to all of the Actors on the stage at once?

• {"func":"blockControlBroadcast","values":[{"type":"string","value":""}]}
• {"func":"registerBroadcastTrigger","values":[{"type":"string","value":""}]}
• {"func":"registerTrigger","values":[{"type":"boolean","value":""}]}
• {"func":"blockControlPostMessage","values":[{"type":"string","value":""},{"type":"string","value":""},{"type":"string","value":""}]}

5. Vanessa programmed one of her Actors to broadcast a message. Another one of her Actors, the knight, does not have a {"func":"registerBroadcastTrigger","values":[{"type":"string","value":""}]} block in his code. What will happen to the knight when the message is sent?

• Nothing will happen
• It will run the code blocks connected to the {"func":"registerBroadcastTrigger","values":[{"type":"string","value":""}]} block
• It will send its own message
• It will disappear from the stage

6. What's the difference between {"func":"blockControlPostMessage","values":[{"type":"string","value":""},{"type":"string","value":"any"},{"type":"string","value":""}]} and {"func":"blockControlBroadcast","values":[{"type":"string","value":""}]}?

• While they both send messages, the 'Send Message' block sends it to one Actor in particular, and has the option of containing some kind of value to send using the 'with' field. The 'Broadcast' block is used to send a message to all Actors on the Stage.
• Only the 'Send Message' block is used to send messages to Actors.
• The 'Send Message' block is used to send messages to Actors, while the 'Broadcast' block is used to send messages only to the Stage.

7. True or false: You can name your messages whatever you want.

• True
• False

8. True or false: It is good practice to use meaningful or helpful names to identify what the message is used for.

• True
• False

9. True or false: You can have multiple When I Receive blocks for the same message.

• True
• False

10. True or false: An Actor can only receive one message.

• True
• False

11. True or false: Multiple Actors can receive the same message.

• True
• False

12. True or false: You can only use the Broadcast block once per project.

• True
• False

13. Cathy wants to program a radio and four of her Actors so that when she clicks on the radio, music will play and her four Actors will dance. Which group of code blocks will help her do that?

• {"func":"registerSpriteTrigger","next":{"func":"blockSoundPlayUntilDone","values":[{"type":"string","value":"music"}],"next":{"func":"blockControlBroadcast","values":[{"type":"string","value":""dance""}]}}}
• {"func":"registerBroadcastTrigger","values":[{"type":"string","value":""dance""}],"next":{"func":"blockSoundStopAll"}}
• {"func":"registerKeyTrigger","values":[{"type":"choice","value":"up arrow"}],"next":{"func":"blockSoundPlay","values":[{"type":"string","value":"music"}]}}
• {"func":"blockControlBroadcast","values":[{"type":"string","value":""music""}]}

14. What does this code block do? {"func":"registerKeyTrigger","values":[{"type":"choice","value":"right arrow"}],"next":{"func":"blockLooksNextCostume","next":{"func":"blockControlWait","values":[{"type":"number","value":".3"}],"next":{"func":"blockLooksSwitchCostume","values":[{"type":"string","value":"stand"}],"next":{"func":"blockControlForever","containers":[{"func":"blockControlBroadcast","values":[{"type":"string","value":"run"}]}]}}}}}

• When the right arrow is pressed, the Actor will change Costumes and the message will be sent repeatedly until the end of the program
• When the right arrow is pressed, the Actor will change Costumes and the message will be sent once
• When the right arrow is pressed, the Actor will change Costumes but the message will not be sent
• When the right arrow is pressed, the Actor will not change Costumes, but the message will be sent ten times

15. What happens if we remove the broadcast block from this code block? {"func":"registerKeyTrigger","values":[{"type":"choice","value":"left arrow"}],"next":{"func":"blockLooksNextCostume","next":{"func":"blockControlWait","values":[{"type":"number","value":".3"}],"next":{"func":"blockLooksSwitchCostume","values":[{"type":"string","value":"blue button off"}],"next":{"func":"blockControlBroadcast","values":[{"type":"string","value":"jump"}]}}}}}

• The message will not be broadcast, and the Actor will not jump
• The message will be broadcast, and the Actor will jump
• The message will not be broadcast, and the Actor will jump
• The message will be broadcast, and the Actor will not jump