CPU VS RAM VS ROM VS CACHE MEMORY
CPU
CPU stands for Central Processing Unit, it is the main part of a Computer system. It is also called the BRAIN of computer.
C = Central (In Center, Main, Most Important, Prime)
P = Processing (Data Processor, Supervisor, Controller, Operation Co-coordinator)
U = Unit (The Part, Thing, The Component)
Central Processing Unit - CPU controls, coordinates and supervises all types of calculations and mathematical operations. It processes the input data and generates the desired output result. CPU consists of Arithmetic Logic Unit (ALU), Control Unit (CU) and Resisters.
ALU - As the name suggested it performs all the arithmetic
and logic operations on the input data.
CU - Control Unit - It controls the overall
operations of the computer. It checks the sequence of execution of
instructions, controls and coordinates the overall functioning.
Registers- CPU Consists of a set of Registers for Temporary Storage of the processed data, but due to very small and limited storage capability we always need to use use an optional / additional data storage device which is called HDD or Hard Disk Drive.
RAM
RAM Stands for Random Access Memory. Since the interaction between user and computer get slow due to small amount of storage (Registers) provided by the CPU, hence Ram is used to store data and instructions during execution of the instructions.
RAM is used to increase the execution speed and interaction between a User and a Computer, As much as RAM you have (2GB,GB, 8GB etc.) The CPU will be Faster and will process data fast and quickly. RAM is expensive and has a limited storage capability. It is a Volatile memory. it can't retain any information after the computer is the powered off.
ROM stands for Read Only Memory. It is the non volatile storage device of a computer system. it store's the BIOS of the Computer system. The BIOS provides the most basic information about storage devices, boot sequence, security, plug and play capability and other items. The Computer loads data (BIOS) from ROM. It makes sure that all the major components of the computer system are working and functioning properly.
You Can read the ROM but can not write, but Nowadays there are several types of ROM's are available like custom ROM, re-writable ROM, etc in which you can read as well as write the data according to your need and choice.
Cache Memory is another very important physical part of a computer system. cache memory is a very high speed memory placed in between RAM and CPU to increase the interaction between a RAM and CPU. Each time whenever RAM needs to execute some instruction or anything need to load from HDD or anything else it takes more time to execute and process the data. so cache memory is used to reduce the time and increase the processing speed.
For example if a person opens a particular website or address on to his computer again and again then Cache Memory remembers it and so it opens this page very fast comparing to other web pages. Cache Memory is very expensive comparing to RAM.
RAM is used to increase the execution speed and interaction between a User and a Computer, As much as RAM you have (2GB,GB, 8GB etc.) The CPU will be Faster and will process data fast and quickly. RAM is expensive and has a limited storage capability. It is a Volatile memory. it can't retain any information after the computer is the powered off.
ROM
ROM stands for Read Only Memory. It is the non volatile storage device of a computer system. it store's the BIOS of the Computer system. The BIOS provides the most basic information about storage devices, boot sequence, security, plug and play capability and other items. The Computer loads data (BIOS) from ROM. It makes sure that all the major components of the computer system are working and functioning properly.
You Can read the ROM but can not write, but Nowadays there are several types of ROM's are available like custom ROM, re-writable ROM, etc in which you can read as well as write the data according to your need and choice.
Cache Memory
Cache Memory is another very important physical part of a computer system. cache memory is a very high speed memory placed in between RAM and CPU to increase the interaction between a RAM and CPU. Each time whenever RAM needs to execute some instruction or anything need to load from HDD or anything else it takes more time to execute and process the data. so cache memory is used to reduce the time and increase the processing speed.
For example if a person opens a particular website or address on to his computer again and again then Cache Memory remembers it and so it opens this page very fast comparing to other web pages. Cache Memory is very expensive comparing to RAM.
