Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

input , output and storage > 1.1 > Flashcards

1.1 Flashcards

1
Q

what is an input device?

A

a device that allows you to get information from the outside world so it can be processed and stored in a digital form

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what are some examples of input devices?

A

keyboards, cameras, card readers, microphones, barcode scanners, mice, web cameras and remote controls

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is an output device?

A

a device which is able to take data which is stored in a digital form and convert it to another formant which humans can understand, eg. sounds, images and vibrations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are examples of output devices?

A

speakers, headphones, printers, projectors, monitors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

can some devices be both input and output devices?

A

yes, some devices such as games console can be considered both an input and an output device. In this case, the games console inputs the buttons pressed on the console by the user and outputs vibrations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is a storage device?

A

any computing hardware, which is used for either temporary or permanent storage of data. This can be internal or external to the computer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what are example of internal storage devices?

A

magnetic hard drives, solid sate hard drives, RAM, ROM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what are example of external storage devices?

A

DVDs , blue-ray disks, USB pens, SD cards, portable hard drives

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is a magnetic storage device?

A

magnetic devices are any devices which store data using magnetic fields

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what are some examples of magnetic storage?

A

magnetic tapes, old floppy disks, and some hard disk drives

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

how does magnetic storage work?

A

a series of magnetic disks known as platters are magnetised. A read write head moves very close to the magnetic surface if the platter. These read write heads are able to detect and modify magnetics properties of the platter. The tiny changes are recorded as binary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what are the advantages of magnetic storage?

A

cheap, large storage capacity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what are the disadvantages of magnetic storage?

A

slow access speed, moving parts makes it fragile

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is an optical storage device?

A

any devices which uses markers which can be read by or written to by an optical laser

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what are some examples of optical storage devices?

A

CDs , DVDs and blu-rays

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

how does optical storage work?

A

data is written to the surface of an optical disk using pits and lands. The disk has a transparent substrate at its base followed by a reflective metal layer which carries the actual information. It works by using a higher power laser which changes the chemical properties of sections of its surface. A laser set at a lower power is then used to read the disk back. It shines light onto the disk through the base and measures the amount of light reflected back. As the point where a pitt starts or ends the light is scattered and therefore it isn’t reflected as well. These changes in reflective and non-reflective areas are recorded as 1s and 0s

17
Q

what are the advantages of optical storage

A

cheap, lightweight, portable

18
Q

what are the disadvantages of optical storage?

A

slow access time, surface is prone to scratches

19
Q

what is solid state storage?

A

solid state storage devices, are any devices, which store data directly onto silicon microchips

20
Q

what are some examples of solid state storage?

A

USB, micro SD cards, portable hard drives

21
Q

how does solid state storage work?

A

It uses flash memory. Data is stored even when the power is turned off(non-volatile). Data is read and written directly to blocks and pages on the silicon microchips

22
Q

what are the advantages of solid state storage?

A

durable, fast access speeds

23
Q

what are the disadvantages of solid state storage?

A

costly, limited read/write cycles

24
Q

what does RAM stand for?

A

random access memory

25
Q

what is RAM?

A

Its primary storage anda type of temporary main memory, its used to store data and programs the computer is currently using. Its much quicker to access data in RAM than it is the access data that’s being held in the computers hard drive or secondary storage.

26
Q

what does RAM hold?

A

Typically RAM will hold the operating system(or the part of the OS being used), the programs the c3mputer is currently running + the data the computer is accessing.

27
Q

why is RAM volatile?

A

RAM is volatile because it loses all its contents when the power is turned off. Data is stored as small charges of electricity in transistors that are on a circuit. This needs to be refreshed or the charge leaks out, hence why data is lost when the power Is switched off

28
Q

what does ROM stand for?

A

read only memory

29
Q

what is ROM?

A

Its a type of primary storage, it cant be changed by a program or a user. It is non-volatile so it retains its contents, even without power. They are embedded on the motherboard of a computer

30
Q

what does ROM hold?

A

ROM, hold the boot sequence for a computer to start up

31
Q

what is cloud storage?

A

it is storing data over the internet instead of a local storage device.

32
Q

what are the advantages of using cloud storage?

A

data can be accessed anywhere with an internet connection, data can be easily shared (dont need to copy data onto portable storage devices) , often considered limitless from the point of view of the user

33
Q

what are the disadvantages of using cloud storage?

A

expensive, slower access speed with slower access speeds

34
Q

where is data being stored, in cloud storage?

A

data is usually being hosted at a large data companies or on large magnetic or solid state drives

35
Q

what can virtual storage be referred to as?

A

virtual storage can also be referred to as the abstraction or separation of logical storage from physical storage

36
Q

how does RAM help?

A

RAM helps enable multitasking. Multitasking means having several programs open and using them at the same time. This is done by copying data needed by the programs at the time so that it can be passed to the CPU when it needs to process that data. It also stores all the instructions from the programs that are open that the CPU will require for processing

37
Q

how does RAM hold data?

A

it uses capacitors and transistors. capacitors can hold an electrical current, when it is holding a current it represents 1 when its not, it represents 0. A transistor acts like a switch that lets the computer read what is on the capacitor or empty/fill up a capacitor

input , output and storage (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions