RAM and ROM – This book covers the entire syllabus of “Computer & Information Technology” prescribed by the BNMC for B.Sc. in Nursing Science & Diploma in Nursing Science & Midwifery students. We tried to accommodate the latest information and topics.
This book is an examination setup according to the teachers’ lectures and examination questions. We hope in touch with the book students’ knowledge will be upgraded and flourished. The unique way of presentation may make your reading of the book a pleasurable experience.
Difference between RAM and ROM:
| Traits | RAM | ROM |
| 1. Definition | Random Access Memory or RAM is a form of data storage that can be accessed randomly at any time, in any order and from any physical location. | Read-only memory or ROM is also a form of data storage that cannot be easily altered or reprogrammed |
| 2. Data | The data is not permanent but it can be altered any number of times. | The data is permanent. It can be altered but only a limited number of times that too at slow speed |
| 3. Speed | It is a high-speed memory. | It is much slower than the RAM. |
| 4. Stands for | Random Access Memory | Read-only memory |
| 5. Types | The two main types of RAM are static RAM and dynamic RAM. | The types of ROM include PROM, EPROM and EEPROM. |
| 6. CPU Interaction | The CPU can access the data stored on it. | The CPU cannot access the data stored on it. |
| 7. Size and Capacity | Large size with higher capacity. | Small size with less capacity. |
| 8. Usage | Primary memory (DRAM DIMM modules), CPU Cache (SRAM). | Firmware like BIOS or UEFI. RFID tags, microcontrollers, medical devices, and at places where a small and permanent memory solution is required. |
| 9. Cost | It doesn’t come cheap | Cheaper than RAM. |
Difference between EPROM & EEPROM:
| Basis for Comparison | EPROM | EEPROM |
| 1. Basic | Ultraviolet Light is used to erase the content of EPROM. | EEPROM contents are erased using electronic signal. |
| 2. Appearance | EPROM has a transparent quartz crystal window at the top. | EEPROM are totally encased in an opaque plastic case. |
| 3. Erased and Reprogrammed | EPROM chip has to be removed from the computer circuit to erase and reprogram the computer BIOS. | EEPROM chip can be erased and reprogrammed in the computer circuit to erase and reprogram the content of computer BIOS. |
| 4. Technology | EPROM is an older technology. | EEPROM is a modern version over EPROM. |
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