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Scala MCQs

A valid description of a covariant type parameter would be:

A type parameter which is fixed when the class is subtyped.

A type parameter which is allowed to vary up for super types.

A type parameter which is fixed for super types.

A type parameter which is allowed to vary down as the class is subtyped.

Answer

Correct Answer: A type parameter which is allowed to vary down as the class is subtyped.

Explanation:

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