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ICT > Unit 3 > Flashcards

Unit 3 Flashcards

1
Q

Q.1 What is a storage device?

A

A. Machine that lets you write and read data.

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2
Q

Q.2 What is storage media?

A

A. Material on which data is stored.

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3
Q

Q.3 What is magnetic storage media?

A

A. Media that stores data magnetically.

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4
Q

Q.4 What is magnetic polarity?

A

A. State of being in North or South pole.

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5
Q

Q.5 What is a hard disk drive?

A

A. Non-volatile memory hardware that stores data on magnetic disks.

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6
Q

Q.6 What is a file allocation table (FAT)?

A

A. Maps the location in which files and folders are stored on the disk.

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7
Q

Q.7 What is random access or direct access memory?

A

A. Accessing data in an unfixed sequence regardless of position on a list.

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8
Q

Q.8 What are fixed hard disk drives?

A

A. Drives permanently connected to the computer contained within the cases of the computer.

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9
Q

Q.9 What are portable hard disk drives?

A

A. A hard disk that connects to a computer externally.

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10
Q

Q.10 What is magnetic tape?

A

A. Stores data in a long line on magnetic tape.

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11
Q

Q.11 What is a magnetic tape drive?

A

A. Device for collecting, backing up and archiving data on a magnetic tape.

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12
Q

Q.12 What is serial storage?

A

A. Data stored in a line on a tape so it has to be read in order.

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13
Q

Q.13 What is sequential storage?

A

A. Data stored and recorded in a particular order.

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14
Q

Q.14 What is optical storage media?

A

A. Media that stores data on surface that can be read with a light source.

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15
Q

Q.15 What are CD ROMs and DVD ROMs?

A

A. CDs and DVDs that are read only.

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16
Q

Q.16 What are CD-Rs and DVD-Rs?

A

A. Blank CDs and DVDs which can be written on only once.

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17
Q

Q.17 What are CD-RWs and DVD-RWs?

A

A. Blank CDs and DVDs which can be written on, erased and reused.

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18
Q

Q.18 What is solid-state storage media?

A

A. Method of storing data electronically with no moving parts.

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19
Q

Q.19 What is flash memory?

A

A. Non-volatile memory chip used for storage and transferring data.

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20
Q

Q.20 What are floating gate transistors?

A

A. Transistors that keep power when switched off.

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21
Q

Q.21 What is a solid-state drive (SSD)?

A

A. Mass storage device like a hard drive without moving parts and data storable with flash memory.

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22
Q

Q.22 What are memory sticks, USB drives and USB pens?

A

A. Storage devices small in size but big in space that plug into USB for reading/writing.

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23
Q

Q.23 What are flash memory cards / computer flash cards (CF card)/ CFast cards/ Secure digital cards (SD card)?

A

A. Small storage devices that look like a card.

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24
Q

Q.24 What is a compact disk (CD)?

A

A. Plastic coated disk which has information written on it with a laser.

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25
Q

Q.25 What is a digital versatile disk (DVD)?

A

A. Plastic coated disk on which digital information is written and read using a laser and can store more than a CD.

26
Q

Q.26 What is a Blu-ray disk?

A

A. Plastic coated disk on which data is written and can hold more information than a DVD.

27
Q

Q.27 What is an optical storage device?

A

A. Device that writes data to or reads from optical media using laser light.

28
Q

What are tracks?

A

Concentric circles on the surfaces of disks that store data

29
Q

What are sectors?

A

Sections within each track.

30
Q

What are the advantages of optical disk?

A

(1) Cheap.
(2) Easy to transport.

31
Q

What are the disadvantages of optical disk?

A

(1) Do not store as much data as hard disk drives.
(2) Slow access speed.
(3) Stored data degrades.

32
Q

What are the advantages of using flash drives?

A

(1) Non-volatile memory.
(2) Solid state.
(3) Portable.
(4) Need little power.
(5) Available in many sizes.
(6) Can be used in different devices.

33
Q

What are the disadvantages of flash drive and memory cards?

A

(1) Can break easily.
(2) Can be lost or misplaced.
(3) May get corrupted.

34
Q

What is the functionality of optical storage media?

A

Single spiral track running from the inside to the outside of the disk. Digital data is stored by etching pits onto the surface of the disk with a laser. The place without pits is known as land, the reflection of land and pits from a laser allows data to be read by reflecting it back to a detector.

35
Q

What are the variations of optical media devices?

A

(1) CDs (Compact devices): 700 MB.
(2) DVDs (Digital versatile disks): 4.7 GB.
(3) Blu-ray disks: 128 GB.

36
Q

What are the types of optical storage media?

A

(1) Read only memory (ROM) [CD-ROM, DVD-ROM].
(2) Recordable (R) [CD-R, DVD-R].
(3) Re-writable (RW) [CD-RW, DVD-RW].

37
Q

How does (ROM) [CD-ROM, DVD-ROM] work as an optical storage media?

A

Can only be read from.

38
Q

How does (R) [CD-R, DVD-R] work as an optical storage media?

A

Can only be written once and can be read.

39
Q

How does (RW) [CD-RW, DVD-RW] work as an optical storage media?

A

Can be read and can be written to multiple times.

40
Q

What is the functionality of Blu-ray?

A

Blue/violet laser allows data to be stored in a more compact way, this allows them to have more storage space.

41
Q

What are the factors of magnetic storage devices?

A

(1) Large, 1-2 TB capacity.
(2) Fast speed.
(3) Not portable or easy to damage while carrying.
(4) Very durable.
(5) Reliable but affected by magnetic fields.
(6) Very low in costs.

42
Q

What are the factors of optical storage devices?

A

(1) Compact disks have 700 MB storage.
(2) Digital versatile disks have 4.7 GB storage.
(3) Blu-ray disks store 128 GB.
(4) Slow in speed.
(5) Large but more portable than hard disk.
(6) Easily scratched and data may be damaged.
(7) Data cannot be overwritten.
(8) Very low costs.

43
Q

What are the factors of solid state drives?

A

(1) Usually have 1 TB of storage.
(2) Very fast in speed.
(3) Very small and portable and can be fit inside a camera.
(4) Less durable than a hard disk drive and has limited write/erase cycles.
(5) Reliable and not affected by magnetic fields.
(6) Expensive.

44
Q

What are the different types of SD card?

A

(1) SD (4-32 GB)
(2) Micro SD (4-32 GB)
(3) SDXC (2 TB)

45
Q

What are the advantages of hard disk drive?

A

(1) Store large amounts of data.
(2) They can access the data randomly without searching through everything.
(3) Low cost.

46
Q

What are the disadvantages of hard disk drive?

A

(1) Physical impact may lead the read/write heads to corrupt data.
(2) Slower to read data than solid state drive.
(3) Noisy.

47
Q

Explain the functionality of fixed hard disk drive.

A

They are permanently connected to the computer and contained within the case of the computer.

48
Q

Explain the functionality of portable hard disk drive.

A

They are contained within their own separate case and can be connected to computers with a cable.

49
Q

What are the advantages of portable drive?

A

(1) Portable.
(2) Can be easily used by multiple computers file sharing and efficiency.
(3) Allows quick archiving of data.

50
Q

What are the disadvantages of portable drive?

A

(1) Could be damaged while being moved.
(2) Hard drive could be lost.

51
Q

Explain the functionality of magnetic tape drives.

A

In a magnetic tape drive, the read/write head stays still and the tape holding the data moves past it. Navigation through the tape can be time consuming thus, it is only used where there is a need to store large amounts of data but speed of access is not important.

52
Q

Explain the functionality of CD and DVD ROMs.

A

The content on the storage devices can never be changed, protecting the data from being corrupted.

53
Q

Explain the functionality of Functionality of CD-Rs and DVD-Rs.

A

The surface is covered with a dye that is burnt when something is written on it. It can be used to copy and store different types of data but it can only be used once.

54
Q

Explain the functionality of CD-RWs and DVD-RWs.

A

There is a layer of metallic allow that switches between being reflective or non-reflective depending on the writing of the data, this allows data to be written multiple times and allows data to be moved from one computer to another.

55
Q

Explain the functionality of solid state storage media devices. (SSD)

A

Flash memory consisting of non-volatile memory chips that keep their charge even when the power is turned off which are much faster than traditional hard disks.

55
Q

What is the disadvantage of SSD?

A

(1) More expensive.
(2) Less storage than hard drives.
(3) Limited number of write and erase cycles.

56
Q

What is the advantage of SSD?

A

(1) Fast access speeds.
(2) Small, light, portable.
(3) Quiet.
(4) No moving parts that can be damaged.

56
Q

What are the different magnetic storage media devices?

A

(1) Fixed hard disk drive.
(2) Portable hard disk drive.
(3) Magnetic tape devices.

57
Q

What are the different solid-state storage media devices?

A

(1) Solid-state drive (SSDs).
(2) Flash memory cards.

57
Q

What are the different optical storage media devices?

A

(1) Compact disks (CDs).
(2) Digital versatile disks (DVDs).
(3) Blu-ray disks.

ICT (20 decks)

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