Unity Unity 5

Question 1

What is object pooling primarily used to optimize?

Accepted Answer

Frequent instantiation and destruction overhead

Answer

Object pooling reuses inactive objects instead of repeatedly instantiating and destroying them, reducing garbage and CPU spikes.

Question 2

Which statement about Vector3.Lerp is correct?

Accepted Answer

It linearly interpolates between two points by a 0-1 factor

Answer

Vector3.Lerp blends between two vectors based on a t value clamped from 0 to 1.

Question 3

What does marking a field 'public' on a MonoBehaviour do by default?

Accepted Answer

Exposes it in the Inspector and to other scripts

Answer

Public fields are serialized and shown in the Inspector as well as accessible from other classes.

Question 4

Which approach avoids per-frame garbage when comparing tags?

Accepted Answer

gameObject.CompareTag("Enemy")

Answer

CompareTag avoids the string allocation that the tag property comparison can cause.

Question 5

What is the NavMesh used for in Unity?

Accepted Answer

AI pathfinding and agent navigation

Answer

A NavMesh defines walkable surfaces so NavMeshAgents can pathfind around obstacles.

Unity Practice Test