Cambridge AS Level Computer Science: Computer's components

The difference between memory and storage is:

• Memory is temporary and storage is permanent.

• Memory is used to store files permanently, storage is temporary.

• Memory and storage are the same thing.

• Storage is faster than memory.

It is necessary to have both internal and external memory/storage devices because:

• Internal memory is used for processing and temporary storage, while external memory provides permanent storage and backup.

• Internal memory is only used for graphics, while external memory is only for sound.

• External memory is faster than internal memory for all operations.

• Internal memory is not required if external memory is present.

The difference between online and offline storage is:

• Online storage is immediately accessible by the computer, while offline storage requires manual intervention to access.

• Online storage is slower than offline storage.

• Offline storage is always connected to the computer, while online storage is not.

• Online storage is only used for backup purposes, while offline storage is used for daily operations.

The difference between data access time and data transfer rate when using memory and storage devices is:

• Data access time is the delay before data transfer begins, while data transfer rate is the speed at which data is moved.

• Data access time is the speed at which data is moved, while data transfer rate is the delay before data transfer begins.

• Both terms refer to the same concept in memory and storage devices.

• Data access time measures storage capacity, while data transfer rate measures device reliability.

________ is a high speed memory external to processor which stores data which the processor will need again.

• Memory cache

• Hard disk

• Register

• Optical drive

________ is a primary memory unit that can be written to and read from.

• Random access memory (RAM)

• Read only memory (ROM)

• Cache memory

• Hard disk

________ is a primary memory unit that can only be read from.

• Read-only memory (ROM)

• Random Access Memory (RAM)

• Cache Memory

• Flash Memory

________ is a type of RAM chip that needs to be constantly refreshed.

• Dynamic RAM (DRAM)

• Static RAM (SRAM)

• Read Only Memory (ROM)

• Flash Memory

________ is a type of RAM chip that uses flip-flops and does not need refreshing.

• Static RAM (SRAM)

• Dynamic RAM (DRAM)

• Read Only Memory (ROM)

• Flash Memory

________ is the requirement to charge a component to retain its electronic state.

• Refreshed

• Grounded

• Isolated

• Amplified