Answer
ref: The variable must be initialized before passing.
out: Initialization is not required before passing, but must be assigned inside the method.
Quick Answer
Both pass by reference but with different rules. ref requires the variable to be initialized before passing — the method can read and modify it. out does not require pre-initialization, but the method must assign a value before returning. Use out for returning multiple values from a method.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ