question sheet vs examination paper

question sheet and examination paper both are nouns.

Word	Noun	Adjective	Verb	Adverb
question sheet	Yes	No	No	No
examination paper	Yes	No	No	No

As nouns, question sheet and examination paper are synonyms defined as:

Other synonyms of question sheet include exam paper, test paper.

question sheet (noun)	examination paper (noun)
a written examination	a written examination