The difference between synchronous and asynchronous

-> From the perspective of order and result (processing)

• After making a request, it waits for the result before processing, waiting for the readiness of the I/O operation
  • The focus is on whether the preparation for a specific I/O operation is ready

• Makes a request and continues with other work, and when the task is completed, it receives a notification of completion and processes the corresponding work
• It is performed through asynchronous APIs at the operating system level, and when the I/O operation is completed, processing is done using an appropriate handler

• If it waits for the system call to complete, it is synchronous
• If it does not wait for the system call to complete, it is asynchronous