Question

Which one of the following is a ROM type?
1. DROM
2. PROM
3. SROM
4. AROM

Answer 1

Correct Answer - Option 2 : PROM

The correct answer is PROM.

• ROM is a non-volatile memory where the memory content could be read multiple times but could not be written.
• There are 4 types of ROM:
  •  MROM, PROM, EPROM, and EEPROM.
• Masked read-only memory (MROM): 
  • ​It is a type of ROM, that is masked off during production. It is used in systems that require long-term sustainability.
• Programmable read-only memory (PROM):
  • ​It is a memory that can be programmed only once after it is created. Once programmed, the information written is permanent and cannot be deleted. 
• Erasable Programmable read-only memory (EPROM):
  • It is a programmable ROM that can be erased and re-used. It can be erased by exposing it to ultra-violet light.
• Electrically Erasable and Programmable Read-Only Memory (EEPROM):  
  • It is a programmable ROM that allows the stored data to be erased electrically.