Whose is a possessive pronoun that you should use when you're asking or telling whom something belongs to. Who's is a contraction made up of the words “who” and “is” or “who” and “has”
The interviewer needed to evaluate the application to see if the girl matched the necessary criteria for the job.
Jenna lives in Jenkinsville, which is such a quaint little town.
The poet's friend will achieve immortality through God on the Judgement Day. He will feel extremely elated and joyous. He will also feel grateful