Test can be a noun and a verb.
Noun: A challenge.
Verb: To challenge.
verb
A noun is a person, place, or thing. A test is a thing. Therefore test is a noun.
The word posttest is a noun. It is a test given after an experience.
Freshman is a noun.Did you see the freshmen test scores?
"Ridiculously" is an adverb in the phrase "ridiculously easy test." It modifies the adjective "easy" to emphasize the extreme simplicity of the test.
Each is a pronoun.
Ace is a noun and a verb.Noun: I have two aces in my hand.Verb: Seth aces every test that he takes.
a verb. He implies there may be a test next week. "He" is the subject "implies" is the verb
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb