What is computer memory and its types

Computer Memory is actually a part of the computer that is used to store data safely. Simply put, it is a physical device, which is used to temporarily and permanently store data, information and instructions in a computer.

Today I thought that all your doubts about computer memory should be cleared today through this article, so that you do not need to go anywhere else.

With this you can understand these technical concepts very easily. So without further delay let’s start and find out What is Computer Memory and its types,

What is computer memory?

what is computer memory in hindi

computer memory There is such a storage space in the computer, where the data that is processed and the instructions that are required for processing are stored there.

For your information, let me tell you that a memory is like a human brain, it is used to store data and instructions.

Computer memory is divided into small parts of many numbers called key cells. Each location or cell has a unique address, which varies from zero to memory size minus one.

For example, if you have 64k words in your computer, then in this memory unit 64 * 1024 = 65536 There are memory locations. The address of this memory locations varies 0 to 65535.

Memory is a very essential part of any computer because without it the computer cannot do even a simple task. There are two basic types of computer memory – primary memory / Volatile memory and secondary memory / non-volatile memory.

Here Random Access Memory (RAM) is a volatile memory and Read-Only Memory (ROM) is a non-volatile memory.

types of computer memory

People always have doubts about the type of Computer Memory. Which I would like to solve today. If seen, there are mainly three types of computer memory.

There are primarily three types of memory: –

  • Cache Memory
  • Primary Memory/ Main Memory
  • secondary memory

What is Cache Memory?

This is the fastest memory of the computer. Cache memory is a very high speed semiconductor memory that speeds up the CPU. It acts like a buffer between CPU and main memory.

They are used to hold data and those parts of the program which are frequently used by the CPU. Data and parts of programs are first transferred from disk to cache memory by the operating system, from where the CPU can access them easily.

Advantages of Cache Memory

Let us get some information about the advantages of Cache Memory.

  • Cache memory is much faster than main memory.
  • It consumes very less access time as compared to main memory.
  • It stores those programs which have to be executed within a short period of time.
  • They store data for temporary use.

Disadvantages of Cache Memory

Let us get some information about some Disadvantages of Cache Memory.

  • Cache memory has limited capacity.
  • It is very expensive.

What is Primary Memory (Main Memory)?

Primary memory holds only those data and instructions in which the computer is currently working. It has very limited capacity and data gets lost in it when the power is switched off.

It is generally made of semiconductor device. These memories are not as fast as registers. Data and instructions that need to be processed reside within this main memory.

They are divided into two subcategories RAM And ROM,

What are the characteristics of Main Memory?

  • These are semiconductor memories.
  • It is also called main memory or prime memory.
  • This is usually volatile memory.
  • Data is lost in this when the power is switched off.
  • This is the working memory of the computer.
  • They are very Faster than secondary memories.
  • A computer does not run without primary memory.

what is ram

The full form of RAM is random access memory, This is a part of the main memory of the computer which can be accessed directly from the CPU. RAM is used to read and write data which cpu random access does.

The memory of RAM is volatile, which means that when the power is turned off, then the information stored in it is also lost. Most of the data and programs that are modified are stored in RAM.

There are two different types of Integrated RAM chips available:

1. SRAM (Static RAM)

2. DRAM (Dynamic RAM)

what is rom

ROM full form is Read Only Memory, Let us know about some of its characteristics.

1. It stores many important information which are necessary to operate the system, such as programs which are essential to boot the computer.

2. This memory is volatile, which means that even after the power is switched off, data is not lost in it.

3. It is used in embedded systems or where there is no need to change any programming.

4. They are mainly used in calculators and peripheral devices.

Different types of Read Only Memory

1. PROM (Programmable read-only memory) – It can also be programmed by the user. And once it has been programmed, then the data and instructions that are in it cannot be changed further.

2. EPROM (Erasable Programmable read only memory) – They can also be reprogrammed. To erase the data in this, they are exposed in ultra violet light. Also to reprogram it, you have to erase all the previous data.

3. EEPROM (Electrically erasable programmable read only memory) – In this the data is erased by applying electric field, along with it there is no need of ultra violet light. If we want, we can erase all the portions of the chip.

What is secondary memory?

This is the third and last memory of Computer Memory. This type of memory can be called external memory or non-volatile memory Also called. It is very slow compared to main memory. Its main use is to store data or information permanently.

CPU cannot access these memories directly, rather they have to use input-output routines for this. The contents of secondary memories are first transferred to the main memory, and only then they cpu access Can do. For example CD-ROM, DVD, Flash Drive, Hard Drive And so on.

What are the characteristics of secondary memory?

  • These are magnetic and optical memories.
  • It is also called backup memory.
  • This is a non-volatile memory.
  • Data is permanently stored in it, even if you switch off the power.
  • It is used to store data in the computer.
  • A computer can also run without a secondary memory.
  • They are very slow compared to primary memories.

Unit of computer memory

Just as units like seconds have been made to measure time, kilometers to measure distance and grams to measure weight, in the same way, units have been determined to measure the storage capacity of computer memory, which is called the unit of computer memory or called units.

Bit is the smallest unit of computer memory, in which only one binary digit 0 or 1 can be stored. The measurement unit of computer memory is as follows in increasing order:-

1 bit= 0 or 1
4 bit= 1 nibble
8 bit= 1 Byte
1000 Byte= 1 kilobyte (KB)
1024 kilobytes (KB)= 1 megabyte (MB)
1024 megabytes (MB)= 1 gigabyte (GB)
1024 gigabytes (GB)= 1 Terabyte (TB)
1024 Terabyte (TB)= 1 petabyte (PB)
1024 petabyte (PB)= 1 exabyte (EB)
1024 Exabyte (EB)= 1 zettabyte (ZB)
1024 Zettabyte (ZB)= 1 Yottabyte (YB)

How many types of memory are there?

There are mainly three types of memory in a computer -: primary memory, secondary memory and cache memory. I have told you about all these memories in detail above.

How many kilobytes (KB) in 1 megabyte (MB)?

1 megabyte (MB) = 1024 kilobytes (KB).

what did you learn today

I hope you like this article of mine What is computer memory? Must have liked it. It has always been my endeavor to provide complete information about the types of computer memory to the readers, so that they do not have to search any other sites or internet in the context of that article.

This will also save their time and they will get all the information in one place. If you have any doubts about this article or you want that there should be some improvement in it, then for this you can write low comments.

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