Unity Unity 3

Question 1

Why is FixedUpdate() preferred over Update() for applying physics forces?

Accepted Answer

It runs at a consistent physics timestep

Answer

FixedUpdate() runs on a fixed timestep aligned with the physics engine, making force application consistent.

Question 2

What does the [SerializeField] attribute do?

Accepted Answer

Exposes a private field in the Inspector

Answer

[SerializeField] allows a private field to appear and be edited in the Inspector while remaining private in code.

Question 3

Which collision callback fires when two colliders begin touching (both have colliders, one a non-trigger Rigidbody)?

Accepted Answer

OnCollisionEnter

Answer

OnCollisionEnter is called when two non-trigger colliders first make contact.

Question 4

What is required for OnTriggerEnter to fire?

Accepted Answer

At least one collider marked Is Trigger and a Rigidbody present

Answer

Trigger events require one collider set to Is Trigger and a Rigidbody on at least one of the objects.

Question 5

What does a Coroutine allow you to do in Unity?

Accepted Answer

Pause execution across frames using yield

Answer

A coroutine can suspend its execution and resume on a later frame using yield statements.

Unity Practice Test