The virtual memory mechanism works by making use of both hardware and software. Computer programmers no longer need to worry about where their data is physically stored or whether the user's computer will have enough memory. Data in ROM is non-volatile, that is, it remains there even without electrical power. For example, some data can be stored in physical RAM chips while other data is stored on a hard drive (e.g. b. It also allows multiple types of memory to be used. Each individually accessible unit of information in storage is selected with its numerical memory address. Options are: a. ROM information can be easily updated. Here is a list of some characteristics of computer memory. Location. Characteristics of Main MemoryMain memory is as vital as the processor chip to a computer system. It is possible to build a computer which uses only static RAM (large capacity of fast memory) ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 5e16e-NDFkO There are many types and sizes available and different systems require different types. Computer memory is used to store data and instructions or in other words we can say memory is a storage space where data has be processed and stored and same with the instructions. Virtual memory carries out its job by mapping memory address used by a program, which are referred to as virtual addresses, into a physical address in the computer memory. Computer Memory. Computer memory is a crucial component within computers, largely responsible for the computer's speed and performance. Random Access Memory (RAM) allows you to open and use the programs on your computer, including your operating system. Fast systems have both a fast processor and a large memory. Virtual Memory Characteristics. Some characteristics are true for both kinds of memory; others are true for just one. Computers Internal and External Memory Characteristics of Computer Memory Location Capacity Unit of transfer Access Method Performance Physical Type Organization UNIVAC Console and CPU CPU’s Memory Hierarchy Capacity Units Bit Byte Kilobyte Megabyte Gigabyte Terabyte b B = 8 b KB = 1,000 B MB = 1,000,000 B GB = 1,000,000,000 B TB = 1,000,000,000,000 B Memory Access Method … Characteristics of Computer Memory. Memory, like the CPU, is an unchanged part of the computer since the 1940s. What characteristic of read-only memory (ROM) makes it useful? Primary Memory / Volatile Memory. Memory used to important role in saving and retrieving data. Types of Memory– Mainly computer have two types memory. In modern computers, location-addressable storage usually limits to primary storage, accessed internally by computer programs, since location-addressability is very efficient, but burdensome for humans. 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