MOD 4.1

Question 1

Input-Output Devices

Answer 1

• Slowest Components
• Diverse types
• Components that interact most with the user

Question 1

Common I/O Devices

Answer 1

• Input
  o Keyboard
  o Mouse
  o Scanner
• Storage
  o Magnetic Disks
  o Flash drives
• Output
  o Display screen
  o Printer

Question 2

Parallel (How?)

Answer 2

Simultaneous transfer of multiple bits

Question 3

Serial (How?)

Answer 3

Data transferred one bit at a time

Question 4

Synchronous (When?)

Answer 4

Using a timing mechanism (Clock)

Question 5

Asynchronous (When?)

Answer 5

Event-based

Question 6

What are the importance of Hard Disk Drives?

Answer 6

• Long term storage of files
• Nonvolatile

Question 7

Is HDD cost effective?

Answer 7

Yes, much cheaper than a Solid State Drive

Question 8

Inside of a HDD

Answer 8

-Magnetic
- Moving parts
– Slow
– Damage-prone

Question 9

What is Seek Time?

Answer 9

Time to get to the track containing the sector

Question 10

What is Rotational Latency?

Answer 10

Time to get to the desired sector

Question 11

Disk Bandwidth

Answer 11

Number of bytes transferred per unit of time

Question 12

What is another term for Disk Bandwidth?

Answer 12

Transfer Rate

Question 13

HDD vs SSD

Answer 13

• HDD
  o Cheaper per byte
  o Needs more power
  o Fragile
• SSD
  o Fast transfer rates
  o Smaller form factor
  o No moving parts
  o Much more expensive per byte

Question 14

What is Form Factor?

Answer 14

Physical Characteristics

Question 15

What is Interface?

Answer 15

• How device communicates with the rest of the system

Question 16

What are the common interfaces?

Answer 16

• sATA, NVMe, PCIe, USB