Question: Which Is The Most Expensive Memory?

Which memory is costly in terms of cost per bit?

As we move from bottom to top in the Hierarchy, the cost per bit increases i.e.

Internal Memory is costlier than External Memory..

What is ROM in memory?

Read-only memory (ROM) is a type of non-volatile memory used in computers and other electronic devices. Data stored in ROM cannot be electronically modified after the manufacture of the memory device.

What are two types of data storage?

There are basically two types of data storage devices available: dynamic storage (like RAM) requires power to maintain its information, while static storage doesn’t, by maintaining the contents even while turned off.

What is secondary memory?

The faster primary memory are also volatile. If we need to store large amount of data or programs permanently, we need a cheaper and permanent memory. Such memory is called secondary memory. Here we will discuss secondary memory devices that can be used to store large amount of data, audio, video and multimedia files.

Is hard disk a ROM?

The main difference between ROM and hard disk is: ROM or Read Only Memory is a part of any device containing a program, data, or information about the device, has been programmed during manufacturing. … But the Hard disk an external data storage medium use to store data by the users.

What is the most expensive storage device?

It costs $4.4m for 100 terabytes of storage. The RamSan-6200 is a scaled up system that combines 20 RamSan-620 solid state disks in a single datacentre rack and uses Texas Memory Systems’ TeraWatch software to provide unified management and monitoring from a single GUI console.

Which is the fastest and most expensive memory in memory hierarchy?

At the top is the fastest, smallest, and most expensive memory, the registers. At the bottom, the largest, cheapest, and slowest memory, off-line archival storage (e.g. a tape library). The upper levels of the memory hierarchy use electronic storage, the lower levels use block-addressed magnetic storage.

Which type of memory is fastest?

Fastest memory is cache memory.Registers are temporary memory units that store data and are located in the processor, instead of in RAM, so data can be accessed and stored faster.More items…•

What is the slowest among the memory in a system?

A typical computer has 3 types of memory: Cache memory, Random Access Memory (RAM), and virtual memory. Cache is the fastest and most expensive, RAM is slower and less expensive, and virtual memory is the slowest and least expensive type.

What are five common storage devices?

What is a storage device?Hard Disk Drive (HDD)Solid State Drive.Random Access Memory (RAM)CD, DVD and Blu-Ray Discs.DVD-RAM.ROM.USB Flash Memory.

Which memory is faster than main memory?

The processor does not have to use the system bus to get or store data in cache memory. Access to cache memory is much faster than to normal main memory. Like virtual memory, cache memory is invisible to most programs.

What are the 10 storage devices?

Digital Data Storage Devices: 10 ExamplesHard Drive Disk.Floppy Disk.Tape.Compact Disc (CD)DVD and Blu-ray Discs.USB Flash Drive.Secure Digital Card (SD Card)Solid State Drive (SSD)More items…•

Is ROM main memory?

ROM: Unlike RAM, Read Only Memory (ROM) is both a non-volatile and permanent form of primary storage. … Cache memory: Also known as CPU memory, cache memory stores instructions computer programs frequently call upon during operation for faster access.

Is ROM still used?

Computer ROM A good example of ROM is the computer BIOS, which is a PROM chip that stores the programming needed to begin the initial computer startup process. Using a non-volatile storage medium is the only way to begin this process for computers and other devices. … ROM-type storage is still used today.