Data storage and compression

Complete the following sentence:

‘The two types of primary storage are ROM and (a)   ’

ROM stands for

(a)  

Select the correct statement from the list below.

• ROM is volatile

• RAM stores instructions used when the computer is first switched on.

• ROM stores instructions used when the computer is first switched on.

• Computers have more ROM than RAM

Complete the following sentence:

‘Storage that is not directly accessible by the CPU is known as (a)   ’

Select the correct statement from the list below.

• Secondary storage is slower to access and holds less data than primary storage.

• Primary storage is faster to access than secondary storage but holds less data.

• Primary storage is slower than secondary storage and holds less data.

• Secondary storage is faster to access than primary storage but holds less data.

Which of the following is not an example of secondary storage?

• SD card

• Hard disk

• DVD

• ROM

Select the correct statement from the list below.

• RAM is an example of secondary storage and is volatile, meaning it loses its contents when the power is removed.

• RAM is an example of primary storage and is volatile, meaning it loses its contents when the power is removed.

• RAM is an example of secondary storage and is non-volatile, meaning it does not lose its contents when the power is removed.

• RAM is an example of primary storage and is non-volatile, meaning it loses its contents when the power is removed.

Select the storage device from the list below.

• USB

• Keyboard

• Hard drive

• Printer

Select the most appropriate type of secondary storage for a fitness tracker that a person might wear on their wrist while jogging.

• RAM

• Optical storage

• Magnetic storage

• Solid-state storage

Select the correct statement about optical storage from the list below.

• Optical storage uses tiny ‘ups’ and ‘downs’ on a disc surface, known as ‘lands’ and ‘pits’. A laser is used to read these patterns.

• Optical storage uses small transistors, known as NAND and NOR gates, to store data electronically.

• Optical storage uses disc surfaces which are charged with a magnetic charge. The differences between these charges can be interpreted as a binary 0 or 1.

• Optical storage uses lasers to burn microscopic ‘0’s and ‘1’s onto a disc surface, creating binary data. These cannot be seen with the human eye, but a laser can be used to read them.