UCA Game Physics & Animation 2

Question 1

Which Rigidbody interpolation mode smooths physics movement by using data from the previous fixed frame?

Accepted Answer

Interpolate

Answer

Interpolate smooths Rigidbody movement by interpolating between the previous and current fixed-update positions.

Question 2

What does the 'Is Trigger' checkbox on a Collider do?

Accepted Answer

Disables physics collision response but still detects overlaps

Answer

A trigger collider generates OnTriggerEnter/Stay/Exit events but does not produce physical collision forces.

Question 3

In Unity's Animator, what is a 'Blend Tree' primarily used for?

Accepted Answer

Blending between multiple animation clips based on one or more float parameters

Answer

A Blend Tree smoothly transitions between animations by blending them according to parameter values such as speed or direction.

Question 4

Which Unity physics callback is called when two non-trigger colliders first make contact?

Accepted Answer

OnCollisionEnter

Answer

OnCollisionEnter is invoked on the frame when two non-trigger colliders first begin overlapping.

Question 5

What is the purpose of Physics Layers and a Layer Collision Matrix in Unity?

Accepted Answer

To control which layers can collide with each other

Answer

The Layer Collision Matrix in Physics Settings lets you selectively enable or disable collision detection between pairs of layers.

(UCA) Unity Certified Associate Game Developer Practice Test