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A Level Computer Science > Input, Output And Storage Devices > Flashcards

Input, Output And Storage Devices Flashcards

(42 cards)

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1
Q

What is an input device?

A

A device used to enter information into a computer

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2
Q

What is an output device?

A

A device that presents digitally stored data from a computer, converted into a form that humans can process

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3
Q

What is a storage device?

A

An internal or external device used for the temporary or permanent storage of data

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4
Q

Give 5 examples of input devices

A
  • Mouse
  • Keyboard
  • Microphone
  • Scanner
  • Webcam
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5
Q

Give 5 examples of output devices

A
  • Monitor
  • Speaker
  • Printer
  • Projector
  • Vibrator (in console)
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6
Q

Give 5 examples of storage devices

A
  • CD
  • DVD
  • HDD
  • DAT tape
  • USB stick
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7
Q

What is optical storage?

A

Secondary storage where data is stored in pits and lands burnt onto a disc and read by a laser

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8
Q

What is magnetic storage?

A

Secondary storage where data is stored using polarised magnetic metal where the polarity represents a 0 or a 1

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9
Q

What is solid state storage?

A

Compact secondary storage where data is stored on semiconductor chips

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10
Q

What is a drive?

A

A device that reads and writes data from secondary storage

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11
Q

What is storage media?

A

The device data is actually stored on

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11
Q

Name 3 advantages of optical storage

A
  • Cheap to produce
  • Lightweight
  • Portable
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12
Q

Name 3 disadvantages of optical storage

A
  • Slow to access data as it is real in a spiral
  • Prone to scratches
  • Low capacity compared to other storage media
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13
Q

Name 2 advantages of magnetic storage

A
  • Cheap
  • Large capacity
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14
Q

Name 2 disadvantages of magnetic storage

A
  • Slow to read data
  • Fragile
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15
Q

Name 3 advantages of solid state storage

A
  • Durable
  • Fast to access data
  • Low power
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16
Q

Name 2 disadvantages of solid state storage

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A
  • Limited number of read/write cycles
  • Expensive
17
Q

Name 3 types of optical storage media

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A
  • CD (CD-R + CD-RW)
  • DVD (DVD-R + DVD-RW)
  • Blu-ray
18
Q

Name 2 types of magnetic storage media

19
Q

Name 3 types of solid state media

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A
  • SSD
  • USB stick
  • Flash Drive (eg. SD card)
20
Q

What is flash storage?

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A

Non volatile solid state storage

21
Q

What is ROM?

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A

Small piece of non volatile read only memory that contains the bootstrap

22
Q

What is RAM?

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A

Temporary volatile store of currently executing instructions and their data

23
Q

What is the bootstrap?

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A

Initial startup instructions to load the OS

24
Describe the process of loading the OS
- ROM load the bootstrap to begin a POST - The POST sends signals to all connected components (eg. RAM, HDD etc.) to inform the CPU of their existence
25
What does POST stand for?
Power-on self test
26
What does volatile mean?
When the power is turned off all data is lost
27
Name 4 examples of primary storage
- RAM - ROM - Registers - Cache
28
What is secondary storage?
Long term, non volatile storage
29
Is RAM volatile?
Yes
30
Is ROM volatile?
No
31
Which memory space are instructions executed in the computer?
From RAM
32
Why are instructions executed in RAM instead of the hard disk?
It is too slow to execute from the hard disk
33
Why are instructions executed in RAM instead of the ROM?
It is too slow to execute from ROM
34
Compare RAM and ROM in terms of capacity
RAM has a much higher capacity than ROM
35
What is virtual storage?
Storing and receiving information remotely over the internet rather than locally
36
Name 3 advantages of virtual storage
- Data can be accessed from anywhere as long as the user has an internet connection - Easier to share and transfer data - No capacity limit (more storage can easily be added without affecting existing storage)
37
Name 3 disadvantages of virtual storage
- Can be expensive - A poor internet connection can lead to slow access speeds - Data cannot be accessed without an internet connection
38
Name 2 examples of virtual storage
- Cloud storage - Networked storage (eg. in schools or offices)
39
What does OCR stand for?
Optical Character Recognition
40
What does OMR stand for?
Optical Character Recognition
41
What is the difference between OCR and OMR?
OCR detects characters (eg. numbers, letters etc.), OMR detects marks (eg. by shading in a box)

A Level Computer Science (11 decks)

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