A flat fee, also referred to as a flat rate or a linear rate, refers to a pricing structure that charges a single fixed fee for a service, regardless of usage.[1] Less commonly, the term may refer to a rate that does not vary with usage or time of use.
Synchronous: interrupt occurs as a result of current process, otherwise asynchronous. User requested: interrupt occurs because of direct result by user task, otherwise coerced. Maskable: if desired the interrupt can be disabled by a user task, otherwise unmasked.
Adruino has several types of interrupts.Interrupt is a process by which arduino stops its regular task or stop its looping and go to interrupt function to complete its given interrupt function task.External interrupt created externally.There are only two external interrupt pin in arduino uno. They are Digital pin 2 and Digital pin 3.