Some travelers report no questions, while others are asked about the purpose of their visit (tourism or work). Airlines, especially Turkish Airlines, may be stricter and request proof of onward/return tickets and hotel bookings before boarding. If you have an onward flight to another country, mention this to border control. It's advisable to have all relevant travel documents (return ticket, hotel reservation, onward travel details) readily available, even if they are not always requested.
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