1.

Which is the fastest technique for a program that has I/O operations?

Programmed I/O

Direct Memory Access

Machine readable

Interrupt-driven I/O 2.

Which of the following techniques does not use interrupts?

Direct Memory Access

Interrupt-driven I/O

Programmed I/O

Programmed I/O and Direct Memory Access 3.

In which direction are I/O commands issued?

From processor to I/O Module

From peripheral device to processor

From I/O Module to processor

From processor to peripheral device 3.

The I/O Module is a:

CPU component

Peripheral device

Intermediate between system bus and external devices

All answers are correct 4.

An interrupt cycle occurs:

Directly after fetch cycle

At any time

Directly after execution cycle

At the beginning of each program 5.

The program counter (PC) holds:

The instruction

The address of the instruction

The number of instructions in a program

The execution time