Device Management Part 1

Question 1

Device management can be deallocated at two levels

Answer 1

Process (task) level
Job level

Question 2

Types of Devices

Answer 2

• Dedicated devices
• Shared devices
• Virtual devices

Question 3

• assigned to only one job at a time
• serve that job for the entire time it’s active or until it releases them

Answer 3

Dedicated Devices

Question 4

Examples of dedicated devices

Answer 4

• Tape drives
• Printer
• Scanner
• Plotters

Question 5

can be assigned to several processes

Answer 5

Shared devices

Question 6

can be shared by several processes at the same time by interleaving their requests.

Answer 6

Direct Access Storage Device (DASD)

Question 7

What type of device is Direct Access Storage Device (DASD) ?

Answer 7

Shared device

Question 8

• a combination of dedicated and shared devices.
• they’re dedicated devices that have been transformed into shared devices.

Answer 8

Virtual device

Question 9

a printer converted into sharable devices through a ____

Answer 9

Spooling program

Question 10

Reroutes all print requests to a disk

Answer 10

Spooling program

Question 11

-acts as an interface between the OS, device drivers, and applications attached via USB host.

Answer 11

Universal Serial Bus (USB) Controller

Question 12

One USB host can accommodate up to ___ different devices

Answer 12

127

Question 13

One USB host can accommodate up to ___ different devices

Answer 13

127

Question 14

Each devices is identified by the _____ with a unique identification number, that allows many devices to exchange data with the computer using the same USB connection.

Answer 14

USB host controller

Question 15

A physical device that receives, stores, and allows users and programs to access electronic data.

Answer 15

Storage media

Question 16

Examples of storage media

Answer 16

1. CD ROM
2. DVD ROM
3. DAT tape
4. DLT tape
5. disk drives
6. SSD
7. Flash Drive

Question 17

The _________ might be inside a computer or other device or attached to a system externally, either directly or over a network.

Answer 17

Storage media

Question 18

Storage media are divided into two groups

Answer 18

• Sequential access storage media
• Direct Access Storage Devices (DASD)

Question 19

store records sequentially, one after the other

Answer 19

Sequential access storage media

Question 20

store either sequential or direct access files

Answer 20

Direct Access Storage Devices (DASD)

Question 21

• Developed for routine secondary storage in early computer systems and features records that are stored serially, one after other.
• The length of these records is usually determined by the application program and each record can be identified by its position on the tape.
• To access a single record, the tape must be mounted and fast-forwarded until the desired position is located.

Answer 21

Magnetic tape

Question 22

Nine-track magnetic tape with three characters records using _____.

Answer 22

odd parity

Question 23

A 1/2-inch wide reel of tape, typically used to back up a main frame computer, can store ____ of characters, or bytes, per inch.

Answer 23

thousands

Question 24

Determined by the number of characters that can be recorded per inch, such as (1600 bpi).

Answer 24

Density of the Tape

Question 25

BPI means

Answer 25

Bytes per inch

Question 26

If the records are stored individually, each record would need to be separated
by a ___ to indicate its starting and ending places.

Answer 26

space

Question 27

Way of grouping the record into blocks before recording them on tape.

Answer 27

Blocking

Question 28

The number of records in a block is determined by the ______.

Answer 28

application program

Question 29

• The rate at which data is transferred from sequential access media
• Can be measured in inches per second (ips)

Answer 29

Transfer Rate

Question 30

Total time required to access data in secondary storage.

Answer 30

Access time

Question 31

Total time required to access data in secondary storage.

Answer 31

Access time