This is from EK website FAQ about logbooks....My guess QR will have the same policies.
"It is a requirement that the candidate provide complete certified logbook records when they are invited for the selection process. It is unacceptable to have some years missing, misplaced or otherwise. Prior to joining, all pilots must provide certified evidence of hours flown. This can either be a stamp in their logbook from their Fleet Manager/Chief Pilot verifying their hours flown or a stamped original letter from the record/fleet department of their respective airline/authority."