The correct answer is Register, Cache, RAM, Hard disk.
- Register
- RAM
- RAM is a hardware element where the data being currently used is stored.
- It is a volatile memory.
- Two types of RAM are
- Static RAM, or (SRAM) and
- Dynamic RAM, or (DRAM).
- Register
- A register holds instructions or data that the processor is working on or will be working on shortly.
- They form part of the processor and are capable of holding only one item at a time.
- Cache
- Cache memory is an area in the computer where codes and instructions are stored.
- Hard disk
- A hard disk drive is an electromechanical data storage device that stores and retrieves digital data using magnetic storage.
- There are four major storage levels on the computer:
- Internal –
- Processor registers and cache.
- Main –
- The system RAM and controller cards.
- On-line mass storage –
- Secondary storage.
- Off-line bulk storage –
- Tertiary and Off-line storage.
- Internal –


