UCA Unity Scripting & Programming 5

Question 1

What is the role of the IEnumerator return type in a Unity coroutine method?

Accepted Answer

It enables the method to yield execution and resume later

Answer

IEnumerator allows a coroutine to use yield statements, pausing execution and resuming it in subsequent frames.

Question 2

Which access modifier makes a field visible in the Unity Inspector without making it public?

Accepted Answer

[SerializeField] private

Answer

[SerializeField] forces Unity to serialize a private field and display it in the Inspector while keeping it private in code.

Question 3

In C#, what does the '??' operator do when used in a Unity script?

Accepted Answer

Returns the left operand if it is non-null, otherwise returns the right operand

Answer

The null-coalescing operator ?? returns the left-hand value if it is not null, otherwise evaluates and returns the right-hand value.

Question 4

What is the result of using 'DontDestroyOnLoad(gameObject)' in a Unity script?

Accepted Answer

The GameObject persists across scene loads instead of being destroyed

Answer

DontDestroyOnLoad() moves the GameObject to a special scene that persists when new scenes are loaded, commonly used for managers.

Question 5

Which operator is used in C# to safely invoke a delegate or event only if it is not null?

Accepted Answer

Both B and C are correct

Answer

Both the null-conditional operator ?. and an explicit null check before Invoke() are valid and functionally equivalent approaches.

(UCA) Unity Certified Associate Game Developer Practice Test