UCA Unity Scripting & Programming 2

Question 1

Which Unity method is called once per physics update, making it ideal for rigidbody force applications?

Accepted Answer

FixedUpdate()

Answer

FixedUpdate() runs at a fixed timestep aligned with the physics engine, ensuring consistent physics calculations.

Question 2

What does the 'ref' keyword do when passed to a C# method in a Unity script?

Accepted Answer

Passes the variable by reference allowing modification

Answer

The 'ref' keyword passes a variable by reference, so changes inside the method affect the original variable.

Question 3

Which attribute prevents a field from appearing in the Unity Inspector while still keeping it public?

Accepted Answer

[HideInInspector]

Answer

[HideInInspector] hides a public serialized field from the Inspector without removing its public accessibility.

Question 4

What is the correct way to cache a component reference efficiently in Unity?

Accepted Answer

Store the result of GetComponent<T>() in Awake() or Start()

Answer

Caching component references in Awake() or Start() avoids the overhead of calling GetComponent<T>() every frame.

Question 5

In Unity, what does 'Instantiate()' return?

Accepted Answer

A reference to the same type as the passed object

Answer

Instantiate() returns an Object of the same type as the argument passed, which can be cast to the appropriate type.

(UCA) Unity Certified Associate Game Developer Practice Test