Memory storage devices and ram

Question 1

Features of RAM

Answer 1

• Volatile (lost if RAM is turned off)
• Used to store data or files
• CAn be written to or read from
• Larger the ram, faster the computer will be
• RAM never runs out of memory, only slows down
• As RAM becomes full, old is overwritten with new data

Question 2

(ROM)

Answer 2

Read only memory

Question 3

Features of ROM

Answer 3

• Non volatile
• Used to store start up instruction
• Can only be read

Question 4

Types of Primary Storage

Answer 4

• RAM
• ROM

Question 5

Types of Secondary storage

Answer 5

• HDD
• SSD

Question 6

(HDD)

Answer 6

Hard Disk Drive

Question 7

(SSD)

Answer 7

Solid State Drive

Question 8

Hard Disk Drives

Answer 8

• Stored in digital format on the magnetic surface of disks (platter)
• Number of read/write heads can access all the surfaces of the disk
• Each platter has 2 surfaces to store data
• Slow compared to RAM

Question 9

Solid State Drives

Answer 9

• No moving parts and all data is received simultaneously
• Store data controlling movement of electrons within NANDS strips as 1/0
• Non volatile rewritable memory
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Question 10

Benefits of SSD over HDD

Answer 10

• More reliable
• Lighter
• lower power consumption
• run cooler
• thin
• faster to access

Question 11

Types of offline storage

Answer 11

• CD/DVD disks
• Blu-Ray disks
• USB flash Memories

Question 12

CD/DVD

Answer 12

• Red laser used to write/write data on the surface
• thin layer of metal alloy
• single spiral track running to the center
• DVD uses dual layering, increasing storage

Question 13

Blu-Ray

Answer 13

• Uses blue laser to write/read
• Wavelength is less, leading to higher storage
• Automatic secure encryption
• uses backup systems

Question 14

USB Flash Memories

Answer 14

• Small lightweight for transferring files
• Small backup devices for photo/music
• Fragile