Examiner (noun)

1. A person who assesses or tests something, such as a candidate in an examination.
2. A person who inspects or scrutinizes something.

Origin:

Late 16th century: from latin examinator, from examinare "to examine", from ex- "thoroughly" +aminare "to judge".

Examples:

1. The examiner asked the candidate a series of challenging questions.
2. The examiner carefully checked the candidate's identification before the exam.
3. The examiner assessed the candidate's knowledge of the subject matter.
4. The examiner was known for his rigorous and fair evaluations.
5. The examiner conducted a thorough inspection of the building before granting approval.