Final Exam Review

1. Which of the following best describes the job of a "physics engine"?

• To handle the complex math needed to simulate realistic physical behavior of game objects

• To handle the logic necessary to add artificial intelligence to game objects

• To help create very large virtual worlds within a video game

• To help draw complex images on the screen

2. What would you do to a game object to make it react to gravity and other physical forces?

• Add a Rigidbody 2D component

• Add a Collider 2D component

• Add a complex C# script

• Add a Physics2D Material

3. Which of the following Rigidbody 2D component properties will change how fast an object falls in response to gravity?

• Mass

• Gravity Scale

• Angular Drag

• Constrain - Y

4. Which of the following Rigidbody 2D component properties would you set to freeze the position of an object in a horizontal (side-to-side) direction?

• Constraints-X

• Constraints-Y

• Constraints-Z

• HorizontalFreeze

5. Which of the following Rigidbody2D component properties will control the amount of air resistance an object will experience when flying through the air or falling?

• Mass

• Gravity Scale

• Linear Drag

• Angular Drag

6. Which of the following components would be best used to detect collisions around a pizza box in a 2D game?

• Box Collider 2D

• Circle Collider 2D

• Edge Collider 2D

• Polygon Collider 2D

7. Which of the following components would be best used to detect collisions around a bicycle wheel in a 2D game?

• Box Collider 2D

• Circle Collider 2D

• Edge Collider 2D

• Polygon Collider 2D

8. Which of the following components would be best used to detect collisions around an irregularly shaped rock?

• Box Collider 2D

• Circle Collider 2D

• Edge Collider 2D

• Polygon Collider 2D

9. How can you get a collider boundary to match the edge of your object image as closely as possible?

• Click the "Edit Collider" button and adjust the green boundary lines

• You have to rely on Unity to automatically set the best boundaries

• You need to add the green boundary lines to the original image file

• You need to add multiple Collider 2D components to the sprite to build up a combination of shapes that match your object

10. An object that wants to move based on game physics AND detect collisions should have which component(s) attached?

• Rigidbody 2D and Collider 2D

• Rigidbody 2D only

• Collider 2D only

• Physics2D only