Programming 301

1. Charlie wants to program his knight to attack when he presses the spacebar. Which group of code blocks will program the knight to play his attack animation?

• {"func":"registerKeyTrigger","values":[{"type":"choice","value":"space"}],"next":{"func":"blockLooksSwitchCostume","values":[{"type":"string","value":"attack 1"}],"next":{"func":"blockControlRepeat","values":[{"type":"number","value":"7"}],"containers":[{"func":"blockLooksNextCostume","next":{"func":"blockControlWait","values":[{"type":"number","value":".3"}]}}]}}}
• {"func":"registerKeyTrigger","values":[{"type":"choice","value":"space"}],"next":{"func":"blockLooksSwitchCostume","values":[{"type":"string","value":"run 1"}],"next":{"func":"blockControlRepeat","values":[{"type":"number","value":"7"}],"containers":[{"func":"blockLooksNextCostume","next":{"func":"blockControlWait","values":[{"type":"number","value":".3"}]}}]}}}
• {"func":"registerKeyTrigger","values":[{"type":"choice","value":"space"}],"next":{"func":"blockControlRepeat","values":[{"type":"number","value":"10"}],"containers":[{"func":"blockLooksNextCostume"}]}}
• {"func":"registerKeyTrigger","values":[{"type":"choice","value":"space"}],"next":{"func":"blockControlRepeat","values":[{"type":"number","value":"7"}],"containers":[{"func":"blockLooksSwitchCostume","values":[{"type":"string","value":"attack 1"}],"next":{"func":"blockControlWait","values":[{"type":"number","value":".3"}]}}]}}

2. What's the difference between the {"func":"blockControlForever","containers":[null]} and {"func":"blockControlForeverIf","values":[{"type":"boolean","value":"false"}],"containers":[null]} blocks?

• The {"func":"blockControlForever","containers":[null]} block will run until the end of the program, while the {"func":"blockControlForeverIf","values":[{"type":"boolean","value":"false"}],"containers":[null]} block will run as long as its condition is satisfied
• The {"func":"blockControlForeverIf","values":[{"type":"boolean","value":"false"}],"containers":[null]} block will run until the end of the program, while the {"func":"blockControlForever","containers":[null]} block will run as long as its condition is satisfied
• The {"func":"blockControlForever","containers":[null]} block and the {"func":"blockControlForeverIf","values":[{"type":"boolean","value":"false"}],"containers":[null]} block will both run even after the program finishes
• The {"func":"blockControlForever","containers":[null]} block will run even after the program finishes, while the {"func":"blockControlForeverIf","values":[{"type":"boolean","value":"false"}],"containers":[null]} block will run as long as its condition is satisfied

3. What is the difference between the {"func":"registerFlagTrigger","next":{"func":"blockControlForeverIf","values":[{"type":"wrapper","func":"valueSensingKeyPressed","values":[{"type":"choice","value":"space"}]}],"containers":[{"func":"blockLooksHide"}]}} and {"func":"registerKeyTrigger","values":[{"type":"choice","value":"space"}],"next":{"func":"blockLooksHide"}} blocks?

• The two code blocks do the same thing - they both make the actor hide when space is pressed
• The first block will make the actor hide as soon as the program starts, while the second block will make the actor hide only when space is pressed
• The first block will not make the actor hide, while the second block will make the actor hide only when space is pressed
• The two code blocks do the same thing - they both make the actor hide when the program is started

4. What would happen if you replaced {"func":"registerFlagTrigger","next":{"func":"blockControlForeverIf","values":[{"type":"wrapper","func":"valueSensingMouseDown"}],"containers":[{"func":"blockLooksNextCostume"}]}} with {"func":"registerFlagTrigger","next":{"func":"blockControlForeverIf","values":[{"type":"wrapper","func":"valueSensingKeyPressed","values":[{"type":"choice","value":"space"}]}],"containers":[{"func":"blockLooksNextCostume"}]}}?

• The actor would change costumes whenever the spacebar is pressed
• The actor would change costumes whenever the mouse button is pressed
• The actor would not be able to change Costumes
• The actor would change Costumes as soon as the program starts

5. Quentin is trying to make an Actor face right every time they bump into another Actor. Which of these blocks does he need in his code to make the Actor face right?

• {"func":"blockMotionPointDirection","values":[{"type":"string","value":"90"}]}
• {"func":"blockMotionMove","values":[{"type":"number","value":"10"}]}
• {"func":"blockMotionGoTo","values":[{"type":"number","value":"0"},{"type":"number","value":"0"}]}
• {"func":"blockMotionPointTowards","values":[{"type":"string","value":"mouse-pointer"}]}

6. True or false: If an Actor with this code block only had two Costumes, we would be able to replace the {"func":"blockLooksSwitchCostume","values":[{"type":"string","value":""}]} block with the {"func":"blockLooksNextCostume"} block. {"func":"registerKeyTrigger","values":[{"type":"choice","value":"space"}],"next":{"func":"blockLooksNextCostume","next":{"func":"blockControlWait","values":[{"type":"number","value":".5"}],"next":{"func":"blockLooksSwitchCostume","values":[{"type":"string","value":"costume 2"}]}}}}

• True
• False

7. What key needs to be pressed to change the costume of this Actor? {"func":"registerKeyTrigger","values":[{"type":"choice","value":"left arrow"}],"next":{"func":"blockLooksNextCostume","next":{"func":"blockControlWait","values":[{"type":"number","value":".5"}],"next":{"func":"blockLooksSwitchCostume","values":[{"type":"string","value":"costume 2"}]}}}}

• The left arrow key
• The space bar
• The right arrow key
• The return key

8. What would happen if we removed the 'Wait' block from this code block? {"func":"registerKeyTrigger","values":[{"type":"choice","value":"left arrow"}],"next":{"func":"blockLooksNextCostume","next":{"func":"blockControlWait","values":[{"type":"number","value":".5"}],"next":{"func":"blockLooksSwitchCostume","values":[{"type":"string","value":"costume 2"}]}}}}

• The actor would change costumes too quickly to see
• The actor would change costumes slowly
• The actor would not change costumes
• The actor would change costumes three times

9. Which block is needed to change to a specific costume?

• {"func":"blockLooksSwitchCostume","values":[{"type":"string","value":""}]}
• {"func":"blockLooksNextCostume"}
• {"func":"blockSoundPlay","values":[{"type":"string","value":""}]}
• {"func":"registerFlagTrigger"}

10. True or false: An Actor can have more than one costume.

• True
• False

11. True or false: An Actor cannot use the {"func":"blockLooksSwitchCostume","values":[{"type":"string","value":""}]} block if they only have one costume

• True
• False

12. Henry wants to play the attack animation when the spacebar is pressed, but the Actor does not correctly change to the first costume of the animation. Which of these blocks is he missing?

• {"func":"blockLooksSwitchCostume","values":[{"type":"string","value":""}]}
• {"func":"blockLooksNextCostume"}
• {"func":"blockLooksHide"}
• {"func":"registerFlagTrigger"}

13. What can we replace this block with to make the Actor move more smoothly? {"func":"registerKeyTrigger","values":[{"type":"choice","value":"up arrow"}],"next":{"func":"blockMotionMove","values":[{"type":"number","value":"5"}]}}

• {"func":"registerFlagTrigger","next":{"func":"blockControlForeverIf","values":[{"type":"wrapper","func":"valueSensingKeyPressed","values":[{"type":"choice","value":"up arrow"}]}],"containers":[{"func":"blockMotionMove","values":[{"type":"number","value":"5"}]}]}}
• {"func":"registerTrigger","values":[{"type":"wrapper","func":"valueSensingKeyPressed","values":[{"type":"choice","value":"up arrow"}]}],"next":{"func":"blockControlRepeat","values":[{"type":"number","value":"10"}],"containers":[{"func":"blockMotionMove","values":[{"type":"number","value":"5"}]}]}}
• {"func":"registerFlagTrigger","next":{"func":"blockControlIf","values":[{"type":"wrapper","func":"valueSensingKeyPressed","values":[{"type":"choice","value":"up arrow"}]}],"containers":[{"func":"blockMotionMove","values":[{"type":"number","value":"5"}]}]}}
• {"func":"registerTrigger","values":[{"type":"wrapper","func":"valueSensingKeyPressed","values":[{"type":"choice","value":"up arrow"}]}],"next":{"func":"blockMotionMove","values":[{"type":"number","value":"5"}]}}

14. What does this code block do? {"func":"registerFlagTrigger","next":{"func":"blockControlForeverIf","values":[{"type":"wrapper","func":"valueSensingTouchingSprite","values":[{"type":"string","value":"mouse-pointer"}]}],"containers":[{"func":"blockMotionMove","values":[{"type":"number","value":"10"}]}]}}

• It would make the actor move forward whenever it is touching the mouse
• It would make the actor turn whenever it is touching the mouse
• It would make the actor flip whenever it is touching the mouse
• It would make the actor change costumes whenever it is touching the mouse

15. What would happen if we removed the {"func":"blockLooksSwitchCostume","values":[{"type":"string","value":"jump 1"}]} block from this code block? {"func":"registerFlagTrigger","next":{"func":"blockControlForeverIf","values":[{"type":"wrapper","func":"valueSensingKeyPressed","values":[{"type":"choice","value":"space"}]}],"containers":[{"func":"blockLooksSwitchCostume","values":[{"type":"string","value":"jump 1"}]}]}}

• The actor will not change at all when space is pressed
• The actor will change to the first jump costume when space is pressed
• The actor will change to the next costume when space is pressed
• The actor will disappear when space is pressed