Multiple choice

Input-output interface provides a method for transferring information between internal storage and external I/O devices. The main function(s) of input-output interface is/are

  1. data conversion

  2. synchronisation

  3. device selection

  4. All of the above

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

(1) Data conversion between digital and analog signal (2) Synchronisation refers to matching of operating speeds of CPU and other peripherals. (3) Device selection refers to the selection of I/O device by CPU in a queue manner.