Input Output (IO) System

Multiple Choice questions & answers are available for a Computer Science students to clear GAT, NTS, ECAT exams, various technical interview, competitive examination, and other entrance exam. Input Output (IO) System is the important Topic for a computer science and technical students and one should practice these Mcqs to grasp good knowledge on the topic.

16.
The following is not a layer of IO management module

PIOCS (Physical Input Output Control System)

LIOCS (Logical Input Output Control System)

FS (File System)

MCS (Management Control System)

17.
If one or more devices use a common set of wires to communicate with the computer system, the connection is called ______

CPU

Monitor

Wirefull

Bus

18.
A ____ a set of wires and a rigidly defined protocol that specifies a set of messages that can be sent on the wires.

Port

Node

Bus

None of the mentioned

19.
When device A has a cable that plugs into device B, and device B has a cable that plugs into device C and device C plugs into a port on the computer, this arrangement is called a _________

Port

Daisy chain

Bus

Cable

20.
The _________ present a uniform device-access interface to the I/O subsystem, much as system calls provide a standard interface between the application and the operating system.

Devices

Buses

Device drivers

I/O systems

21.
A ________ is a collection of electronics that can operate a port, a bus, or a device.

Controller

Driver

Host

Bus

22.
An I/O port typically consists of four registers status, control, ________ and ________ registers.

System in, system out

Data in, data out

Flow in, flow out

Input, output

25.
The hardware mechanism that allows a device to notify the CPU is called _______

Polling

Interrupt

Driver

Controlling

26.
The CPU hardware has a wire called __________ that the CPU senses after executing every instruction.

Interrupt request line

Interrupt bus

Interrupt receive line

Interrupt sense line

27.
The _________ determines the cause of the interrupt, performs the necessary processing and executes a return from the interrupt instruction to return the CPU to the execution state prior to the interrupt.

Interrupt request line

Device driver

Interrupt handler

All of the mentioned

28.
In general the two interrupt request lines are :

Maskable & nonmaskable interrupts

Blocked & nonmaskable interrupts

Maskable & blocked interrupts

None of the mentioned

29.
The _________ are reserved for events such as unrecoverable memory errors.

Nonmaskable interrupts

Blocked interrupts

Maskable interrupts

None of the mentioned

30.
The ________ can be turned off by the CPU before the execution of critical instruction sequences that must not be interrupted.

Nonmaskable interrupt

Blocked interrupt

Maskable interrupt

None of the mentioned

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