Question 1

Explain the difference between a serial-port controller and a SCSI bus controller.

Accepted Answer

A serial-port controller is a simple dev

Question 2

A dedicated device cannot be used concurrently by several processes or threads.

Accepted Answer

A) True 
 B)False

Question 3

In polling I/O, the main inefficiency comes from

Accepted Answer

A)  the hardware controller when it notifies the CPU that the device is ready for service. 
B)  the basic polling operation that may be comprised of several CPU instructions. 
C)  polling when it is attempted repeatedly yet rarely finds a device ready for service. 
D)  the slow data transfer rate between a device and the host. 
A)  the hardware controller when it notifies the CPU that the device is ready for service. 
B)  the basic polling operation that may be comprised of several CPU instructions. 
C)  polling when it is attempted repeatedly yet rarely finds a device ready for service. 
D)  the slow data transfer rate between a device and the host.

Question 4

What is interrupt chaining?

Accepted Answer

Interrupt chaining is a technique in whi

Question 5

A current trend in I/O device technology and I/O subsystem is

Accepted Answer

A)  there is an increasingly broad variety of I/O devices. 
B)  new devices are similar to the previous I/O devices that makes it easier to incorporate them in operating systems. 
C)  to encapsulate the oddities of different I/O devices, the device drivers present device-specific interface for each device to the I/O subsystem. 
D)  All of the above. 
A)  there is an increasingly broad variety of I/O devices. 
B)  new devices are similar to the previous I/O devices that makes it easier to incorporate them in operating systems. 
C)  to encapsulate the oddities of different I/O devices, the device drivers present device-specific interface for each device to the I/O subsystem. 
D)  All of the above.

Question 6

What are the three reasons that buffering is performed?

Accepted Answer

A buffer is a memory area that stores da

Question 7

Escape (or back door) in application I/O interface

Accepted Answer

A)  allows a user to interrupt a device at any time. 
B)  allows access to a few additional devices, such as a time-of-day clock and a timer. 
C)  transparently passes arbitrary commands from an application to a device driver. 
D)  enables managing of devices with widely varying speeds ranging from a few bytes per second to gigabytes per second. 
A)  allows a user to interrupt a device at any time. 
B)  allows access to a few additional devices, such as a time-of-day clock and a timer. 
C)  transparently passes arbitrary commands from an application to a device driver. 
D)  enables managing of devices with widely varying speeds ranging from a few bytes per second to gigabytes per second.

Question 8

Vectored IO allows one system call to perform multiple IO operations involving a single location.

Accepted Answer

A) True 
 B)False

Question 9

What is the purpose of a programmable interval timer?

Accepted Answer

The programmable interval timer is hardw

Question 10

In memory-mapped I/O

Accepted Answer

A)  main memory of the computing device is used for communicating with the I/O devices using the standard I/O instructions. 
B)  main memory of the computing device is used for communicating with the I/O devices using the special I/O instructions. 
C)  address space of the computing device is used for communicating with the I/O devices using the standard I/O instructions. 
D)  address space of the computing device is used for communicating with the I/O devices using the special I/O instructions. 
A)  main memory of the computing device is used for communicating with the I/O devices using the standard I/O instructions. 
B)  main memory of the computing device is used for communicating with the I/O devices using the special I/O instructions. 
C)  address space of the computing device is used for communicating with the I/O devices using the standard I/O instructions. 
D)  address space of the computing device is used for communicating with the I/O devices using the special I/O instructions.

Explain the difference between a serial-port controller and a SCSI bus controller.

A dedicated device cannot be used concurrently by several processes or threads.

In polling I/O, the main inefficiency comes from

What is interrupt chaining?

A current trend in I/O device technology and I/O subsystem is

What are the three reasons that buffering is performed?

Escape (or back door) in application I/O interface

Vectored IO allows one system call to perform multiple IO operations involving a single location.

What is the purpose of a programmable interval timer?

In memory-mapped I/O

Introduction

Operating-System Structures

Processes

Threads Concurrency

Cpu Scheduling

Synchronization Tools

Synchronization Examples

Deadlocks

Main Memory

Virtual Memory

Mass-Storage Structure

File-System Interface

File-System Implementation

File-System Internals

Security

Protection

Filters

Exam 12: Io Systems

Explain the difference between a serial-port controller and a SCSI bus controller.

A dedicated device cannot be used concurrently by several processes or threads.

In polling I/O, the main inefficiency comes from

What is interrupt chaining?

A current trend in I/O device technology and I/O subsystem is

What are the three reasons that buffering is performed?

Escape (or back door) in application I/O interface

Vectored IO allows one system call to perform multiple IO operations involving a single location.

What is the purpose of a programmable interval timer?

In memory-mapped I/O

Introduction

Operating-System Structures

Processes

Threads Concurrency

Cpu Scheduling

Synchronization Tools

Synchronization Examples

Deadlocks

Main Memory

Virtual Memory

Mass-Storage Structure

File-System Interface

File-System Implementation

File-System Internals

Security

Protection

Filters