Introduction to Information Technology

University of Modern Sciences

College of Business

Introduction to Information Technology

CS 101

Fall 2015/2016

Mr. Junaid Ur Rahman Bin Umar

Assignment 1

Difference between RAM and ROM

Prepared by: Abdulla Al Ameri

S0000001425

Section 1

RAM

RAM: Random-Access Memory is a volatile memory used for data storage on a computer. The name states the memory can be accessed in a random order, without having to alter or read other data. This stores data that is used by programs, however once the computer is shut down, the data is wiped out. RAM operates much faster that ROM. It comes in the form of microchips of different sizes such as 256MB, 512MB, 1GB, 2GB etc. Computers are designed, so that RAM can be increased up to a certain capacity.

RAM has two types: Static RAM (SRAM) or Dynamic RAM (DRAM). In SRAM, data is held in a flip-flop form, where each flip-flop holds a bit of memory. This data does not need constant refreshing is fairly faster than DRAM, however it is expensive and is only used as a cache in a PC. DRAM has memory cells paired with a transistor and capacitor requiring constant refreshing.

ROM

ROM: Read-Only Memory is a type of non-volatile storage system in a PC. Every computer comes fitted with this memory that holds instructions for starting up the computer. ROM stores critical programs, such as the program that boots the computer and performs diagnostics. Data stored in ROM cannot be easily rewritten or modified. This data is also not lost when the computer is powered down. However, ROMs operate at a much slower speed that RAM. In addition to computer, ROMs are also used in calculators and peripheral devices such as laser printers, in which ROM stores the fonts.

Difference between RAM and ROM

Options | RAM | ROM |

Elaboration | Random Access Memory | Read Only memory |

Accessibility | In reference with the processor, the information stored in the RAM is easily accessed | The processor cannot directly access the...