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Computing > SLR2 - Memory and Storage > Flashcards

SLR2 - Memory and Storage Flashcards

1
Q

What are the different types of primary memory?

A

Random Access Memory (RAM)
Read Only Memory (ROM)
Registers
Cache

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2
Q

Volatile meaning

A

Contents are lost when the power is turned off.

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3
Q

Non-Volatile meaning

A

Contents are kept when the power is turned off.

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4
Q

Qualities of Primary Memory

A

It holds the data and instructions which the CPU needs access to while a computer is running.
The CPU can access data from primary memory much quicker than from secondary storage.

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5
Q

What is Random Access Memory (RAM)?

A

Holds the operating system, programs and data in use by the CPU when the computer is running.

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6
Q

What does RAM stand for?

A

Random Access Memory

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7
Q

What does ROM stand for?

A

Read Only Memory

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8
Q

What is Read Only Memory (ROM)?

A

Holds the first instructions for when the computer is first turned on known as the bootstrap.

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9
Q

Is RAM volatile or non-volatile?

A

Volatile (contents lost when power is turned off).

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10
Q

Is ROM volatile or non-volatile?

A

Non-volatile (contents kept when power is turned off)

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11
Q

Which is larger: RAM or ROM?

A

RAM is large in comparison to ROM

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12
Q

Why is Secondary Storage needed?

A

Because ROM is Read Only and RAM is volatile.

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13
Q

What are some other reasons Secondary Storage is needed?

A
  • Storage of programs and data when the power is turned off.
  • Semi-permanent storage of data that can change.
  • Backup of data files
  • Archive of data files
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14
Q

Examples of Optical storage are:

A

CD-R/RW, DVD-R/RW, Blu-Ray

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15
Q

Properties of Optical storage devices are:

A
  • low capacity compared to other types of storage
  • slow access to data
  • Thin, lightweight, portable
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16
Q

Examples of Magnetic storage are:

A

Hard disk drive, tape

17
Q

Properties of Magnetic Storage devices are:

A
  • High storage capacity
  • Quick to access data
  • Has moving parts, which eventually fail
  • Hard disks perform better if they are defragmented
18
Q

Examples of Solid-State storage are:

A

SSD, Memory Sticks, Flash memory cards

19
Q

Properties of Solid-State Storage devices are:

A
  • Medium storage capacity
  • Very quick to access data
  • No moving parts, very reliable
  • No noise
  • Low power
  • No need for defragment
  • Limited number of read/write cycles
  • Expensive compared to other types of storage
20
Q

What are the key points to be considered when deciding which storage device should be used?

A
  • Capacity: how much data needs to be stored.
  • Speed: how quickly does the data need to be read and transferred?
  • Portability: if data needs to be transported (size, shape and weight)
  • Durability: how robust is the media? Will it be damaged by shocks or extreme conditions?
  • Reliability: does it need to be used over and over without failing?
  • Cost: how expenisive is the media per byte of storage?
21
Q

What is optical storage suitable for?

A
  • read only data distribution on a large scale
  • small capacity situations
22
Q

What is magnetic storage suitable for?

A
  • when very high data capacity is required
  • fast access to data
  • cloud storage on server farms
23
Q

What is solid-state storage suitable for?

A
  • low power, small embedded systems
  • rugged applications: portable devices
  • small to medium data capacity requirements
  • silent operation
  • very fast access to data
  • for situations where the devices need to be small and lightweight
24
Q

What is Cloud Storage?

A

Remote services that store data that can be accessed over the internet.

25
Q

What are the advantages of Cloud Storage?

A
  • Access to files anytime from many devices.
  • Automatic backup is possible
  • Files no longer take up any space on your own device
  • collaborate on files easily
26
Q

What are the disadvantages of Cloud Storage?

A
  • can be costly, typically a monthly of yearly subscription cost.
  • No access to files without and internet connection

Computing (3 decks)

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