Visa-free usually means that you do not need to apply for a visa in advance and can enter directly without visa procedures. But this does not necessarily equate to a visa on arrival. A visa on arrival refers to a visa applied for and obtained at the airport or border port after arriving in the destination country.
For visa exemption, whether round-trip air tickets and hotel orders are required depends on the visa exemption policy of the specific country. Some countries may require applicants to provide round-trip air tickets and hotel reservations as proof of travel plans upon entry, while other countries may not require this. It is recommended that before planning to travel to a visa-free country, you should check the country’s specific visa-free policy in detail to ensure that all entry requirements are met.