Programming 301

1. What kind of variable can be easily accessed and changed by all Actors, including the Stage?

• Global variable
• Local variable
• International variable
• Local constant

2. Which of these values can be stored in a variable?

• 1
• 10
• 0
• All of these values can be stored in a variable.

3. What are the resulting values of these two variables? {"func":"blockVarSet","values":[{"type":"string","value":"variable1"},{"type":"string","value":"10"}],"next":{"func":"blockVarSet","values":[{"type":"string","value":"variable1"},{"type":"string","value":"50"}],"next":{"func":"blockVarSet","values":[{"type":"string","value":"variable2"},{"type":"string","value":"10"}],"next":{"func":"blockVarChangeBy","values":[{"type":"string","value":"variable2"},{"type":"number","value":"50"}]}}}}

• variable1 = 50, variable2 = 60
• variable1 = 50, variable2 = 50
• variable1 = 10, variable2 = 50
• variable1 = 10, variable2 = 10

4. What are the resulting values of these two variables? {"func":"blockVarSet","values":[{"type":"string","value":"variable1"},{"type":"string","value":"100"}],"next":{"func":"blockVarSet","values":[{"type":"string","value":"variable1"},{"type":"string","value":"-10"}],"next":{"func":"blockVarSet","values":[{"type":"string","value":"variable2"},{"type":"string","value":"100"}],"next":{"func":"blockVarChangeBy","values":[{"type":"string","value":"variable2"},{"type":"number","value":"-10"}]}}}}

• variable1 = -10, variable2 = 90
• variable1 = -10, variable2 = -10
• variable1 = 100, variable2 = 90
• variable1 = 100, variable2 = -10

5. What are the resulting values of these two variables? {"func":"blockVarSet","values":[{"type":"string","value":"variable1"},{"type":"string","value":"0"}],"next":{"func":"blockVarSet","values":[{"type":"string","value":"variable1"},{"type":"string","value":"50"}],"next":{"func":"blockVarSet","values":[{"type":"string","value":"variable2"},{"type":"string","value":"0"}],"next":{"func":"blockVarChangeBy","values":[{"type":"string","value":"variable2"},{"type":"number","value":"-50"}]}}}}

• variable1 = 50, variable2 = -50
• variable1 = 50, variable2 = 50
• variable1 = 0, variable2 = 50
• variable1 = 0, variable2 = -50

6. What are the resulting values of these two variables? {"func":"blockVarSet","values":[{"type":"string","value":"variable1"},{"type":"string","value":"0"}],"next":{"func":"blockVarSet","values":[{"type":"string","value":"variable1"},{"type":"string","value":"1"}],"next":{"func":"blockVarSet","values":[{"type":"string","value":"variable2"},{"type":"string","value":"0"}],"next":{"func":"blockVarChangeBy","values":[{"type":"string","value":"variable2"},{"type":"number","value":"1"}]}}}}

• variable1 = 1, variable2 = 1
• variable1 = 0, variable2 = 0
• variable1 = 0, variable2 = 1
• variable1 = 1, variable2 = 0

7. Ellen is programming a game where her dragon has a local variable called "health". She has also programmed her enemy plane to have a local variable called "health". Will changing the dragon's "health" variable affect the enemy plane’s "health" variable?

• No, because local variables are specific to their Actor.
• Yes, because both variables have the same name
• Yes, because local variables can be accessed and changed easily by any Actor
• No, because the variable resets each time it is added to a new Actor

8. Nicole has a variable called "invincibility". When she changed this variable through her dragon Actor, the variable also changed for her other Actors. Is "invincibility" a local or global variable?

• Local
• Global

9. Alex created a variable called "health" for his enemy plane. When he has the dragon selected, he can no longer access the "health" variable. Is "health" a local or global variable?

• Local
• Global

10. Jeff created a variable called "score" to keep track of the score for his game. When different types of planes are defeated, they can add different values to the score. Is "score" a local or global variable?

• Local
• Global

11. True or false: If I change a global variable in one Actor's code, the value of that variable has been changed for all Actors.

• True
• False

12. True or false: It's good practice to reset all of your variables at the start of a project.

• True
• False

13. True or false: If I change a local variable in one Actor's code, the value of that variable has been changed for all Actors.

• True
• False

14. True or false: There is no difference between the Set Variable To and Change Variable By blocks. {"func":"blockVarSet","values":[{"type":"string","value":""},{"type":"string","value":""}]}{"func":"blockVarChangeBy","values":[{"type":"string","value":""},{"type":"number","value":""}]}

• True
• False

15. True or false: The resulting value for this "health" variable will always be 10 after running this code block, regardless of the initial value. {"func":"blockVarChangeBy","values":[{"type":"string","value":"health"},{"type":"number","value":"10"}]}

• True
• False