Question

what is introgative adjective

Answer 1

Interrogative adjectives are words similar to interrogative pronouns, but they can’t stand on their own.  In other words, they serve to modify another term, specifically a noun.  The words “which” and “what” are the two interrogative adjectives and are used in interrogative sentences to modify nouns found in the question

Answer 2

They could be interrogative pronouns. ... The above are examples of “what” and “which” used in the pronoun form. In these two cases, the words are NOT used as adjectives. As long as “what” or “which” modify a noun or pronoun, and is found in an interrogative sentence, identifying them in a sentence is a simple task!