Q1) What do you call a person(e.g. a teacher) who are in an exam room and prevent students from cheating?

Q2) Is 'an exam room' correct?
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Comments  (Page 3) 
thanks a lot
The Flying Squad was/is commonly called 'the Sweeney'.

Can anyone guess how this slang name is arrived at?Emotion: stick out tongue

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(noun) Invigilator (BrE)
(noun) Proctor (AmE)
(verb) to invigilate (an exam)
(verb) to proctor (an exam)
Exam supervisor

the exam room

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A) an invigilator