For example, to go from A to Z in random access, we can directly jump to any specified location. Random Access Method: It is a method used to randomly access data from memory.Whereas, the data received from random access memory (RAM) can be in any order. Sequential Access Method: The sequential access method is used in a data storage device to read stored data sequentially from the computer memory.DMA: As the name specifies, Direct Memory Address (DMA) is a method that allows input/output (I/O) devices to access or retrieve data directly or from the main memory.Access Methods: Memory can be accessed through four modes of memory.The storage word length can vary in bits, such as 8, 16 or 32 bits. ![]() External devices' storage capacity is measured in terms of bytes, whereas the internal memory is measured with bytes or words. Storage capacity can vary in external and internal memory. ![]() Capacity: It is the most important feature of computer memory.Whereas, external memory is the separate storage device from the computer, such as disk, tape, USB pen drive. the example of primary memory are registers, cache and main memory. The internal memory is inbuilt in computer memory. Location: It represents the internal or external location of the memory in a computer.Features of Memoryįollowing are the different features of the memory system that includes: Then the data is called from secondary memory to main memory and performs the execution of codes. If the processor does not need particular items for a longer time, the program or data is automatically saved into the permanent or secondary memory. For example, when we write and execute any computer program, it is initially stored in primary memory. We can retrieve it when the data is required. In the computer system, we need computer memory to store various types of data like text, images, video, audio, documents, etc. The address of the memory's cells varies from 0 to 65535. For example, if the size of computer memory is 64k words, the memory units have 64 * 1024 = 65536 locations or cells. Each cell has a unique address to store the data in memory, ranging from zero to memory size minus one. ![]() The memory block is split into a small number of components, called cells. It is the collection of storage units that stores binary information in the form of bits. What is computer memory?Ĭomputer memory is any physical device, used to store data, information or instruction temporarily or permanently. Also, we will discuss types of memory, features of memory, RAM, ROM, SRAM, DRAM, and its advantages and disadvantages. In this section, we have discussed the classification of memory in detail. The computer system categorizes the memory for different purposes and uses. In computers, memory is the most essential component of the normal functioning of any system.
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