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

Input, Output And Storage Devices Flashcards

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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

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

Name 3 types of optical storage media

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

Name 2 types of magnetic storage media

A
  • HDD
  • DAT Tape
19
Q

Name 3 types of solid state media

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

What is flash storage?

A

Non volatile solid state storage

21
Q

What is ROM?

A

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

22
Q

What is RAM?

A

Temporary volatile store of currently executing instructions and their data

23
Q

What is the bootstrap?

A

Initial startup instructions to load the OS

24
Q

Describe the process of loading the OS

A
  • 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
Q

What does POST stand for?

A

Power-on self test

26
Q

What does volatile mean?

A

When the power is turned off all data is lost

27
Q

Name 4 examples of primary storage

A
  • RAM
  • ROM
  • Registers
  • Cache
28
Q

What is secondary storage?

A

Long term, non volatile storage

29
Q

Is RAM volatile?

A

Yes

30
Q

Is ROM volatile?

A

No

31
Q

Which memory space are instructions executed in the computer?

A

From RAM

32
Q

Why are instructions executed in RAM instead of the hard disk?

A

It is too slow to execute from the hard disk

33
Q

Why are instructions executed in RAM instead of the ROM?

A

It is too slow to execute from ROM

34
Q

Compare RAM and ROM in terms of capacity

A

RAM has a much higher capacity than ROM

35
Q

What is virtual storage?

A

Storing and receiving information remotely over the internet rather than locally

36
Q

Name 3 advantages of virtual storage

A
  • 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
Q

Name 3 disadvantages of virtual storage

A
  • Can be expensive
  • A poor internet connection can lead to slow access speeds
  • Data cannot be accessed without an internet connection
38
Q

Name 2 examples of virtual storage

A
  • Cloud storage
  • Networked storage (eg. in schools or offices)
39
Q

What does OCR stand for?

A

Optical Character Recognition

40
Q

What does OMR stand for?

A

Optical Character Recognition

41
Q

What is the difference between OCR and OMR?

A

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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