Yes, you are correct. Dead can be used as a predicative and attributive adjective. Most adjectives can be used as both a predicative and attributive adjective.

1. He is dead

dead comes after the linking verb is in this sentence, so it is a predicative adjective.

2. Dead man is over there.

Dead comes before the noun man in this sentence, so it is an attributive adjective.

Yes, you are correct. Dead can be used as a predicative and attributive adjective. Most adjectives can be used as both a predicative and attributive adjective.

1. He is dead

dead comes after the linking verb is in this sentence, so it is a predicative adjective.

2. The dead man is over there.

Dead comes before the noun man in this sentence, so it is an attributive adjective. An article "The" is also needed for English grammar.