Programming 101

1. If you have 4 backgrounds and want to switch to a random one, which block should you put inside the {"func":"blockLooksSwitchBackground","values":[{"type":"string","value":""}]} block?

• {"type":"wrapper","func":"valueOpRandom","values":[{"type":"number","value":"1"},{"type":"number","value":"4"}]}
• {"func":"blockLooksNextBackground"}
• {"type":"wrapper","func":"valueLooksBackgroundName"}
• {"type":"wrapper","func":"valueOpRandom","values":[{"type":"number","value":"0"},{"type":"number","value":"4"}]}

2. What is a quick way to move an Actor 10 pixels upwards without changing its direction?

• {"func":"blockMotionChangeYBy","values":[{"type":"number","value":"10"}]}
• {"func":"blockMotionChangeXBy","values":[{"type":"number","value":"10"}]}
• {"func":"blockMotionMove","values":[{"type":"number","value":"10"}]}
• {"func":"blockMotionPointDirection","values":[{"type":"string","value":"0"}]}

3. In a maze with white walls, how can you check if an Actor is running into walls?

• Use {"func":"blockLooksChangeEffect","values":[{"type":"choice","value":"color"},{"type":"number","value":"25"}]}
• Use
  {"func":"blockControlIf","values":[{"type":"wrapper","func":"valueSensingTouchingColor","values":[{"type":"color","value":"#ffffff"}]}],"containers":[null]}
• Use
  {"func":"blockControlForever","containers":[{"func":"blockMotionPointTowards","values":[{"type":"string","value":"mouse-pointer"}],"next":{"func":"blockControlWait","values":[{"type":"number","value":".1"}]}}]}
• Use {"func":"blockMotionMove","values":[{"type":"number","value":"10"}]}

4. Nicole made a maze game with an exit sign so that the player knows where to go. Her exit sign is an Actor. How will she know if the player has reached the exit sign?

• {"func":"blockControlIf","values":[{"type":"wrapper","func":"valueSensingTouchingSprite","values":[{"type":"string","value":"Exit Sign"}]}],"containers":[null]}
• {"func":"blockMotionMove","values":[{"type":"number","value":"10"}]}
• {"func":"blockControlIf","values":[{"type":"wrapper","func":"valueSensingTouchedActorName"}],"containers":[null]}
• {"func":"registerKeyTrigger","values":[{"type":"choice","value":"up arrow"}],"next":{"func":"blockMotionChangeXBy","values":[{"type":"number","value":"10"}]}}

5. Joe made a maze game that has a "Game Over" display that should only show up when the player wins. However, when he starts playing the maze game, the "Game Over" display is always there, even while he's trying to play! What code did he forget?

• {"func":"registerFlagTrigger","next":{"func":"blockLooksHide"}}
• {"func":"blockLooksShow"}
• {"func":"blockMotionChangeXBy","values":[{"type":"number","value":"10"}]}
• {"func":"registerFlagTrigger","next":{"func":"blockLooksNextCostume"}}

6. If an Actor is moving forever but you want the user to be able to control what direction he moves in, what should you put under the {"func":"registerKeyTrigger","values":[{"type":"choice","value":""}]} blocks for each direction?

• {"func":"blockMotionTurnCW","values":[{"type":"string","value":""}]} or {"func":"blockMotionTurnCCW","values":[{"type":"string","value":""}]}
• {"func":"blockLooksShow"}
• {"func":"blockMotionChangeXBy","values":[{"type":"number","value":"10"}]}
• {"func":"blockMotionMove","values":[{"type":"number","value":"10"}]}

7. Jessica has a background called "GameOver" that she displays when the player has won her game. She wants to stop all the sounds from playing when the "GameOver" background is being displayed. What code can she use?

• {"func":"registerBackgroundChange","values":[{"type":"string","value":"GameOver"}],"next":{"func":"blockSoundStopAll"}}
• {"func":"registerFlagTrigger","next":{"func":"blockSoundStopAll"}}
• {"func":"blockSoundPlayUntilDone","values":[{"type":"string","value":""}]}
• {"func":"blockLooksSwitchBackground","values":[{"type":"string","value":"GameOver"}]}

8. True or False: In programming, colors are represented by numbers like #000000.

• True
• False

9. True or False: The {"type":"wrapper","func":"valueSensingTouchingColor","values":[{"type":"color","value":"#ffffff"}]} block can go inside a conditional block like {"func":"blockControlIf","values":[{"type":"boolean","value":"false"}],"containers":[null]}

• True
• False

10. Nicole made a maze game with an exit sign so that the player knows where to go. Her exit sign is an Actor. How will she know if the player has reached the exit sign?

• {"func":"blockControlIf","values":[{"type":"wrapper","func":"valueSensingTouchingSprite","values":[{"type":"string","value":"Exit Sign"}]}],"containers":[null]}
• {"func":"blockMotionMove","values":[{"type":"number","value":"10"}]}
• {"func":"blockControlIf","values":[{"type":"wrapper","func":"valueSensingTouchedActorName"}],"containers":[null]}
• {"func":"registerTiltTrigger","values":[{"type":"choice","value":"forward"}],"next":{"func":"blockMotionChangeXBy","values":[{"type":"number","value":"10"}]}}