Difference between RAM (Random Access Memory) and ROM (Read Only Memory)

The difference between RAM (Random Access Memory) and ROM (Read Only Memory) is explained here in detail. RAM is a form of computer memory that can be read and changed in any order, typically used to store working data and machine code.

Difference between RAM and ROM – UPSC Notes
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ROM is a type of non-volatile memory used in computers and other electronic devices. The difference between RAM vs ROM will help in understanding the basics better and know their comparisons thoroughly.

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Aspirants would find this article very helpful while preparing for the IAS Exam.

Differences between RAM and ROM

The major differences between RAM and ROM are:

Definition of RAM is Random Access Memory Definition of ROM is Read-only Memory
Random Access Memory (RAM) is expensive when compared to ROM ROM is cheaper when compared to RAM.
The speed of Random Access Memory (RAM) is higher when compared to ROM The speed of Read-only Memory (ROM) is slower when compared to RAM.
Random Access Memory (RAM) has a higher capacity when compared to ROM ROM has a lower capacity compared to RAM
Data in RAM can be modified, erased, or read. Data in ROM can only be read, it cannot be modified or erased.
The data stored in RAM is used by the Central Processing Unit (CPU) to process current instructions The data stored in ROM is used to bootstrap the computer.
Data stored on RAM can be accessed by the Central Processing Unit. If the Central Processing Unit (CPU) needs to access the data on ROM, first the data must be transferred to RAM, and then the Central Processing Unit (CPU) will be able to access the data.
Data of RAM is very volatile, it will exist as long as there is no interruption in power. Data present in Read-Only Memory (ROM) is not volatile, it is permanent. Data will remain unchanged even when there is a disruption in the power supply.

These are the main differences between RAM and ROM. The differences given in the above table can help the UPSC Civil Service Exam aspirants to answer any related questions easily in the exams.

After learning about the RAM and ROM difference, visit the below-given links to know the details of the National Cyber Security Policy, Cybercrime, Cybersecurity, and Artificial Intelligence thoroughly. Also, visit the link on the Weekly Current Affairs Quiz.

Difference between RAM and ROM – UPSC Notes
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FAQ about RAM (Random Access Memory) and ROM (Read Only Memory)


What are the types of ROM (Read Only Memory)?

ROM is classified into 4 types: MROM (Masked read-only memory), PROM (Programmable read-only memory), EPROM (Erasable Programmable read only memory), and EEPROM (Electrically erasable programmable read only memory).

What are the types of RAM (Random Access Memory)?

There are two types of RAM – Static RAM (SRAM) and Dynamic RAM (DRAM).

What is ROM used for?

ROM provides the necessary instructions for communication between various hardware components. As mentioned before, it is essential for the storage and operation of the BIOS, but it can also be used for basic data management, to hold software for basic processes of utilities and to read and write to peripheral devices.

Where is RAM stored?

The storage space for RAM is easily identifiable and almost exclusively located in the upper right corner of any consumer level motherboard. These slots are long slender grooves with the width of only a few millimeters.

What is stored in ROM??

ROM is memory that cannot be changed by a program or user. ROM retains its memory even after the computer is turned off. For example, ROM stores the instructions for the computer to start up when it is turned on again.

The above details would help candidates prepare for UPSC 2023.

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