Unity Certified User Programmer Practice Questions - Unity Certified User Programmer Exam

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A script throws a NullReferenceException on the line rb.AddForce(Vector3.up); where rb is declared as private Rigidbody rb;. What is the most likely cause?

The Vector3.up value is null AddForce only works inside FixedUpdate The rb field was never assigned, so it is still null Rigidbody is not a valid Unity type

Correct Answer:

The rb field was never assigned, so it is still null

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