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지시엣이 Computer Science > 1.3 Memory > Flashcards

1.3 Memory Flashcards

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1
Q

List 5 types of memory

A

Cache, registers, RAM, ROM and virtual memory

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2
Q

What is RAM?

A

Random Access Memory

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3
Q

What is ROM?

A

Read Only Memory

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4
Q

What is RAM often referred to as?

A

Primary memory

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5
Q

Can you read and write to RAM?

A

Yes, and is much faster to access than a Hard Drive or secondary storage in general

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6
Q

At any time, what will RAM most likely store?

A
  • The operating system (or parts currently in use)
  • The software currently in use
  • The data which the software is using
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7
Q

What happens to RAM when the computer is turned off?

A

The data that it is holding is lost (RAM is volatile as it loses data if the power is off)

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8
Q

What happens to RAM when the computer is turned on?

A

No data is stored in RAM

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9
Q

After turning on, what loads into the RAM?

A

The operating system

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10
Q

What happens when you load an application?

A

It loads onto RAM from secondary storage so it can be accessed

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11
Q

What happens when you run out of space in your RAM?

A

Virtual memory is used as an extension to RAM

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12
Q

What is virtual memory?

A

An extension to RAM

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13
Q

Virtual memory advantages

A
  • Uses cheap secondary storage on the Hard Drive

- Prevents error message saying out of memory

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14
Q

Virtual memory disadvantages

A
  • Accessing virtual memory is very slow
  • To access data in virtual memory, the data not being used in RAM needs to be copied; to virtual memory, then data in virtual memory needs to be copied to RAM
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15
Q

What is the use of ROM?

A

Permanent data held in primary storage even when a computer is turned off

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16
Q

What happens to ROM if the computer is turned off?

A

ROM is non-volatile meaning that it won’t lose its data when it is turned off

17
Q

What is stored on ROM in a modern computer?

A
  • Bootstrap

- BIOS

18
Q

What is bootstrap?

A

The initial program that is run when the computer turns on and tells the computer where it will find the operating system on the hard drive

19
Q

What is BIOS?

A
  • Basic Input / Output System which can run without a hard drive or secondary storage being present
  • It controls basic technical configuration of the computer such as the processor speed and system time
20
Q

RAM size

A

Typically 4GB to 32GB

21
Q

What is RAM used to store?

A

Running programs and operating systems

22
Q

RAM can:

A

Read, write and is volatile

23
Q

ROM size

A

Typically 4MB to 8MB

24
Q

Rom can:

A

Read, but not write

지시엣이 Computer Science (37 decks)

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