CS Unit 3 T4 - Memory

CS Unit 3 Memory

By Michael Harrington

Dropdown

You need to read the exam questions carefully to be able to answer them correctly in your exam.

If your answer is correct about the topic but NOT on the mark scheme you will not get any marks. So please answer the question they ask you!



How do you do this?

Read all the questions very​

Select answer

.

Home

Open in new tab

Copy link

Dropdown

Show you know the objectives. What is the missing word?

Random Access Memory (?)

Select answer

Dropdown

Show you know the objectives. What is the missing word?



Describe what is meant by ​

Select answer

memory including: How it is created and used

The reason it is necessary

Multiple Select

There are four types of memory that are used in computers systems?

Which did you cover in the last few lessons?

• CPU registers

• Cache

• RAM

• ROM

• Virtual memory

Multiple Select

There are four types of memory that are used in computers systems?

Which will you you cover in this lesson?

• CPU registers

• Cache

• RAM

• ROM

• Virtual memory

Multiple Choice

Virtual memory is part of the hard drive used as an extension to what?

• Hard disk

• RAM

• Page

• Swapping or paging

Multiple Choice

What is a fixed-length block of virtual memory data know as?

• Hard disk

• RAM

• Page

• Swapping or paging

Multiple Choice

When pages of data are moved between RAM and hard disk this is known as what?

• Hard disk

• RAM

• Page

• Swapping or paging

Multiple Choice

When the RAM neas more memory is uses a small part of cheap secondary storage from where?

• Hard disk

• RAM

• Page

• Swapping or paging

Multiple Select

When pages of data are moved between RAM and hard disk this is known as swapping or paging

What are the advantages of using part of the hard disk in this way?

• Uses cheap secondary storage on the hard drive

• Prevents error messages saying ‘out of memory’ – the programs and files will still open

• To access data, the existing data in RAM needs to be copied to the virtual memory, then data in virtual memory needs to be copied to RAM

• Accessing virtual memory is very slow

Multiple Select

Virtual memory

When pages of data are moved between RAM and hard disk this is known as swapping or paging

What are the Disadvantages of using part of the hard disk in this way?

• Uses cheap secondary storage on the hard drive

• Prevents error messages saying ‘out of memory’ – the programs and files will still open

• To access data, the existing data in RAM needs to be copied to the virtual memory, then data in virtual memory needs to be copied to RAM

• Accessing virtual memory is very slow

Open Ended

What happens when RAM on a PC can not store any more data?

Open Ended

What can you do to help the PC recover from not having enough RAM space?

Multiple Select

RAM vs ROM differences

Characteristic of RAM

• Size Typically 4 GB – 32 GB

• Size Typically 4 MB – 8 MB

• Used to store

  Running programs and operating system

• BIOS and bootstrap

Multiple Select

RAM vs ROM differences

Characteristic of ROM

• Size Typically 4 GB – 32 GB

• Size Typically 4 MB – 8 MB

• Used to store

  Running programs and operating system

• BIOS and bootstrap

Multiple Choice

The speed that data can be accessed changes through the different components in a computer

The slower components are far cheaper for each byte of data stored

Which is the correct - access speed from Fastest to Slowest

• RAM/ROM

  Processor

  Virtual on Hard Drive

  Cache

• Virtual on Hard Drive

  RAM/ROM

  Cache

  Processor

• Processor

  Cache

  Virtual on Hard Drive

  RAM/ROM

• Processor

  Cache

  RAM/ROM

  Virtual on Hard Drive

Complete the worksheet 4 now

Open Ended

Research this:

Write about one difference between RAM and ROM?

Open Ended

Research this:

How much RAM is typically available in a modern personal computer?

Open Ended

Research this:

Why is virtual memory much slower than RAM?

Poll

If you had this question in an exam, how many marks could you get?

[this is just your opinion]

• 0

• 1

• 2

• 3

• 4

Poll

If you had this question in an exam, how many marks could you get?

[3 mark question]

[this is just your opinion]

• 0

• 1

• 2

• 3