Brainscape's Knowledge GenomeTM

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


See full index

Computer Science > 5.2 - Data Storage > Flashcards

5.2 - Data Storage Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

3 groups of memory storage devices

A

Primary memory

Secondary storage

Offline storage

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

Examples of internal secondary storage (2)

A

HDD (Hard Disk Drive)

SSD (Solid State Drive)

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

Examples of external secondary storage (5)

A

DVD

CD

DVD - RAM

Blu-ray disk

USB

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

Difference between primary memory and secondary storage (5)

A

primary memory directly addressable by CPU while secondary storage not

Secondary storage is all non-volatile

secondary storage can be external or internal to computer

Primary storage faster to access than secondary storage

primary stores less data than secondary

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

Function of primary memory

A

allows CPU to access applications/services temporarily stored in memory locations

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

Can RAM be written to

A

yes

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

Can RAM be read from

A

yes

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

Function of RAM (4)

A

store data

store files

store part of application currently in use

store part of operating system currently in use

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

Is RAM temporary or permanent

A

temporary - data can be changed by user or computer

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

Is RAM volatile or non-volatile

A

volatile - memory contents lost when powering off computer

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

What are the 2 types of RAM technology (2)

A

DRAM (Dynamic RAM)

SRAM (Static RAM)

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

Which RAM does Cache use

A

SRAM

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

How does SRAM work

A

uses flip-flops which hold each bit of memory

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

SRAM and DRAM differences (6)

A

SRAM more expensive

SRAM more power

DRAM for main memory while SRAM for cache

SRAM faster

DRAM stores more bits per chip

DRAM needs to be recharged to maintain data while SRAM holds data as long as there is power

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

ROM features (4)

A

non-volatile - data not lost once computer powered off

ROM is permanent - cannot be changed or written to

contents can only be read

often used to store instructions a computer needs to access when powering up

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

When is ROM used

A

BIOS (basic input and output system)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Differences between RAM and ROM (4)

A

RAM is a temporary memory device while ROM is a permanent memory device

RAM is volatile while ROM is non-volatile

RAM can be written to and read from but ROM cannot be altered

RAM used to store data currently in use while ROM stores data needed to start up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

3 types of technology for secondary (and off-line) storage (3)

A

magnetic

solid state

optical

19
Q

What technology does HDD use

A

magnetic

20
Q

Disadvantages of HDD (2)

A

hard disk can have slow data access when compared to RAM

can have latency - time delay

21
Q

Do SSDs have moving parts

A

no

22
Q

Benefits of SSDs over HDDs (5)

A

no moving parts - more reliable/less damage

lighter

thinner

data is faster than HDD

lower power consumption

23
Q

Drawbacks of SSD (2)

A

does not last long

is usually not used in servers

24
Q

Benefits of memory sticks (2)

A

small for transferring files between computers

can be used as small back-up devices

25
Q

How does virtual memory work

A

moves oldest data out of RAM into HDD when RAM is full

26
Q

Benefits of virtual memory (3)

A

programs larger than RAM can still be executed

reduces need to buy more RAM

doesnt waste memory with data not being used

27
Q

Drawbacks of virtual memory (2)

A

disk thrashing - system too busy moving data in out of memory to do anything

slower as it is using data from secondary storage

28
Q

How does cloud storage work (3)

A

data stored on remote servers

same data stored on more than one server - clients can access data at any time

owned and managed by company

29
Q

Cloud storage benefits (5)

A

file can be accessed as long as there is internet

customer does not need same computer or to carry external storage device with them

cloud provides back-up

cloud storage can recover data

cloud offers almost unlimited storage capacity

30
Q

Cloud storage drawbacks (3)

A

unstable internet can cause problems accessing files

can be expensive if large storage capacity required

cloud storage can fail and lose all data

31
Q

Examples of SSD (3)

A

SD card

RAM

USB flash memory drive

32
Q

Software stored on SSDs (3)

A

operating system

application software

utility software

33
Q

Examples of what is stored in primary memory (5)

A

BIOS

start-up instructions

programs currently in use

data currently in use

par of OS currently in use

34
Q

Purpose of the secondary storage (4)

A

permanently stores data

loads application software

loads operating system

allows user data to be accessed

35
Q

How does an SSD store data (6)

A

uses NAND/NOR technology/flip-flops

stores data by flashing it onto chips

controls flow of electrons using
transistors

electric current reaches control gate

current flows through to floating gate to be stored

when data is stored transistor is converted from 1 to 0

36
Q

Which of these (HDD, SSD, USB) has no moving parts

A

SSD

USB

37
Q

Which of these (HDD, SSD, USB) is non-volatile

A

HDD

SSD

USB

38
Q

Which of these (HDD, SSD, USB) can use NAND gates to store data

A

SSD

USB

39
Q

Which of these (HDD, SSD, USB) uses magnetic properties to store data

A

HDD

40
Q

Which of these (HDD, SSD, USB) has the smallest physical size

A

USB

41
Q

Which of these (HDD, SSD, USB) has the slowest read/write speeds

A

HDD

42
Q

How HDD stores data (7)

A

has platters

platters divided into tracks

platter spun

read/write arm moves across storage media

read/writes data using electromagnets

uses magnetic fields to control magnetic dots of data

magnetic field determines binary value

43
Q

What does primary memory contain (3)

A

RAM

ROM

Cache

Computer Science (15 decks)

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