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IT > LO1 computer hardware > Flashcards

LO1 computer hardware Flashcards

1
Q

examples of input devices 1.1

A

mouse, keyboard, microphone, sensors, graphics tablet, remote controller, sensors

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2
Q

examples of output devices 1.1

A

monitor, printer, speakers, headphones, projector, plotter

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3
Q

what dose an input device do? 1.1

A

receives data that the user inputs and sends it to the output device

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4
Q

what dose an output device do? 1.1

A

displays or gives out data in a human perceptible from the devices (e.g. displays data on a monitor or headphones plays music)

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5
Q

what is a biometric device? 1.1

A

a device that uses human charachteristics as part of its security system (e.g. fingerprint, face, voice, iris)

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6
Q

examples of biometric devices 1.1

A

certain phones, tablets, laptops, computer systems etc

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7
Q

advantages of biometric devices 1.1

A

improved security even if password is leaked, quick and easy source of varification

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8
Q

disadvantages of biometric devices 1.1

A

expensive and time consuming to install, can be unreliable e.g. dirty fingers, bad lighting, loud environment, some types aren’t disability friendly, privacy concerns

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9
Q

where would the biometric security information of the users be stored? 1.1

A

in a database

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10
Q

what are the two types of input device? 1.1

A

manual and auto

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11
Q

examples of auto input devices 1.1

A

microphones, webcams, some barcode scanners

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12
Q

examples of manual input devices 1.1

A

mouse, keyboard, touchscreen

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13
Q

what three components are necessary in every type of computer? 1.2

A

processor, motherboard, power supply unit

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14
Q

what is a processors main role? 1.2

A

to manage the functions of a computer system by processing the data and instructions

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15
Q

what is the primary processor of every computer system? 1.2

A

CPU

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16
Q

what dose CPU stand for? 1.2

A

central processing unit

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17
Q

what is a motherboard? 1.2

A

the main circuit board of a computer

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18
Q

what is a motherboards purpose? 1.2

A

connects components together in a small area so components can communicate easily

19
Q

what is contained in a motherboard? 1.2

A

USB sockets, battery, VGA socket, CPU, DDR socket, PSU socket, IDE socket, chip, express PIC, PCI

20
Q

what dose the power supply unit (PSU) do? 1.2

A

converts electricity from AC (alternation current) to DC (direct current) so the computer can use it.

21
Q

what are the two types of memory? 1.2

A

volatile and non-volatile

22
Q

what is volatile memory? 1.2

A

temporary

23
Q

what dose non-volatile memory do? 1.2

A

saves data even if not saved after turning off a device and stores it long term. it can still be accessed

24
Q

what is RAM? 1.2

A

random access memory

25
Q

is RAM volatile or non-volatile? 1.2

A

volatile (temporary)

26
Q

what dose RAM do? 1.2

A

stores all of the programmes that are currently running and large parts of the operating system so it can be accessed by the CPU. each is made up of many storage locations identifiable by a unique address.

27
Q

what is ROM? 1.2

A

read only memory

28
Q

is Rom volatile or non-volatile? 1.2

A

non-volatile (cannot be changed)

29
Q

what dose ROM do? 1.2

A

stores the boost programmes/BIOS for when the computer is switched on. the BIOs loads up the operating system to manage the computer

30
Q

is cache volatile or no-volatile? 1.2

A

volatile

31
Q

what dose cache do? 1.2

A

stores data that is frequently accessed

32
Q

why is the cache accessed so quickly? 1.2

A

because it is closer to the CPU

33
Q

types of secondary storage 1.2

A

magnetic storage, optical storage, solid state storage and cloud storage

34
Q

what is magnetic storage found on? 1.2

A

magnetic hard drive disk (HDD)

35
Q

how dose the HDD work? 1.2

A

a read/write head moved above the disk platter and uses the magnetic field of the platter to read or write data.

36
Q

what replaced floppy disks? 1.2

A

SSDs (solid state devices) like USBs

37
Q

pros of magnetic storage 1.2

A

large capacity, cheeper than solid state, quick access speed, but slower then SSD

38
Q

cons of magnetic storage 1.2

A

not durable, not really portable when in use due to the increased risk of damaging it

39
Q

what is optical storage? 1.2

A

it uses a laser to project beams of light onto a spinning disc so it can read data form a CD, DVD or Blu-ray Disc

40
Q

pros of optical storage 1.2

A

thin and portable

41
Q

cons of optical storage 1.2

A

low capacity, not durable as it can break and scratch easily, has the slowest access speed

42
Q

dose SSD have any moving parts? 1.2

A

no

43
Q

pros of SSD 1.2

A

durable and strong if of a decent quality, small and portable (USB), fastest access speed due to no moving pieces, high capacity

44
Q

cons of SSD 1.2

A

more expensive per gigabyte then magnetic

IT (5 decks)

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