Programming 302

1. True or false: An Actor's X linear velocity determines how fast it is moving horizontally

• True
• False

2. True or false: Setting an Actor's linear velocity to 0 by 0 means it will stop moving. {"func":"blockPhysicsSetLinearVelocityXY","values":[{"type":"number","value":"0"},{"type":"number","value":"0"}]}

• True
• False

3. True or false: An Actor with no X linear velocity or Y linear velocity is not moving.

• True
• False

4. What is the difference between an impulse and an Actor's velocity?

• An impulse acts on an Actor, while velocity is a property of an Actor
• An impulse is a property of an Actor, while velocity acts on an Actor
• Both an impulse and velocity act on an Actor
• Both an impulse and velocity are properties of an Actor

5. Which direction would an Actor be moving after running this code block? {"func":"blockPhysicsSetLinearVelocityXY","values":[{"type":"number","value":"0"},{"type":"number","value":"-10"}]}

• The Actor would be moving up
• The Actor would be moving down
• The Actor would not be moving
• The Actor would be moving right

6. What are the benefits of functions?

• It shrinks the size of code blocks. This makes the blocks easier to read.
• We can reuse the function rather than rewriting the code over and over again.
• It allows you to test smaller portions of the your code rather than testing large blocks of code. This allows you to find bugs easier.
• All of the above

7. Kelly defined a function "GoLeft" in her hero Actor. She called the same function in a different enemy Actor. Which of the following statements is correct?

• She cannot define a function called "GoLeft."
• She can define the function, but cannot call the function in another Actor.
• Once the function is defined, it's available for all Actors.
• If a function is defined on the Stage, it's available for all Actors.

8. You can make an Actor animate and move at the same time.

• True
• False

9. True or False: The following code blocks will animate an Actor that has multiple Costumes.
{"func":"registerFlagTrigger","next":{"func":"blockControlForever","containers":[{"func":"blockLooksNextCostume","next":{"func":"blockControlWait","values":[{"type":"number","value":".5"}]}}]}}

• True
• False

10. How do you make an Actor animate and move across the Stage at the same time?

• Do the animation by switching Costumes, and use a 'Move' block to move across the Stage
• You cannot do this
• Use a 'Move' block and the Costumes will automatically change
• Switch Costumes and the Actor will automatically move