3 Memory and Processors

1 State what is meant by 'ROM'. (1)

ROM is meant by Read Only Memory which stores data permanently.

2 State what is meant by 'RAM'. (1)

RAM is meant by Random Access Memory which cannot store data when it has now power.

3 Explain why increasing the amount of RAM in a system improves the user experience. (3)

Increasing the amount of RAM in a system improves the user experience because adding more RAM can improve the performance of a computer system when the user is using multiple files or programs at the same time. It can also be useful to increase the amount of RAM when programs are updated, as the updates often include more complex features that require the use of more memory.

4 Describe what virtual memory is and why it is used. (2)

When the computer system does not have enough space in RAM, the operating system creates a memory using an area of secondary storage. This memory is known as virtual memory.

Virtual memory is used to simulate physical RAM by using hard disk space.

5 List three characteristics of RAM that make it different to ROM. (3)

a. RAM is a form of data storage that can be accessed randomly at any time, in any order and from any physical location, allowing quick access and manipulation.

b. RAM allows the computer to read data quickly to run applications. It allows reading and writing.

c. RAM is volatile i.e. its contents are lost when the device is powered off.

6 Explain two reasons why the characteristics of flash memory make it suitable for use as secondary storage in smart phones. (4)

a. Flash memory is known for its fast read and write speeds, which makes it an ideal choice for secondary storage in smart phones. Smart phone users often require quick access to their data and files, such as photos, videos, and music. With flash memory, data can be quickly accessed, and files can be transferred and saved in a matter of seconds. 

b. Flash memory is durable and reliable, making it an excellent choice for user in smart phones. Smart phones are often exposed to extreme temperatures, vibrations, and shock, and they require a storage medium that can withstand these conditions. Flash memory can withstand these harsh environments and continue to operate reliably.

7 Which one of these describes the term 'clock cycle'? (1)

A The number of items per second that a processor can carry out instructions.

B The number of instructions that a processor can carry out each second.

C The number of items that a processor can load instructions for processing.

D The number of items that each process repeats in a processor.

A The number of items per second that a processor can carry out instructions.

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