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Computer Memory

The computer memory is a physical device used to store data or programs for use in a computer. Some types of computer memory include RAM (random access memory), ROM (read-only memory), and page cache.

4,434 Questions

Define byte kilobyte megabyte and gigabyte?

Here is a list of bits and bytes:

  • 1 bit = binary digit
  • 8 bits = 1 byte (B)
  • 1000 bytes = 1 kilobyte (kB)
  • 1000 kilobytes = 1 megabyte (MB)
  • 1000 megabytes = 1 gigabyte (GB)
  • 1000 gigabytes = 1 terabyte (TB)
  • 1000 terabytes = 1 petabyte (PB)
  • 1000 petabytes = 1 exabyte (EB)
  • 1000 exabytes = 1 zettabyte (ZB)
  • 1000 zettabytes = 1 yottabyte (YB)

How many bytes is billion?

4 bytes are enough to represent any integer in a range of approximately -2 billion, to +2 billion.

How many pins are on a simm?

Generally i believe they had 32 pins. I think they had some more recent revisions that had like 64 or something, but generally they were 32.

Is DIMM the same as SDRAM?

DIMM happens to be the size of the slot where you apply the SDRAM, DIMM is typically a 168-pin slot which is probably what you have if you have a most up to date or current motherboard. In older motherboards, you find SIMM slots which have only 72 pins. Basically, you are able to use much more memory today than like before. if you are using windows operating system you can go to the help section and enter the word DIMM in the search. This should get you started on a more clearer idea and as well lead you towards more information to your question.

What does RAM mean in talking about a computer?

RAM stands for Random Access Memory.

The term Random Access refers to the fact that the computer can read or write to any specific addresses in any order required. It does not have to be gone through sequentially. This is the memory the computer works with when it is running a program ... as opposed to the storage memory of disk drives. While disk drives are also random access, they are not referred to as such. Disk drives are much slower, so the code the computer is working with is copied into RAM while it is using it, along with any data it might be working with.

What is a Storage device that typically uses flash memory to store data instructions and information?

This is a very general question. There are many types of data storage devices, but the most common storage device that holds data instructions and information we think about today in the modern personal computer is the Hard Disk Device (HDD).

The HDD is an example of a magnetic storage media. Other example are tape drives, and floppy disks. Other types of storage are Optical (CD's and DVD's) and solid state devices like flash drives.

Why is physical memory better than virtual memory?

Physical memory (in a computer) is 'better' than virtual memory because it is much faster (and speed is usually the main concern in this subject area). Physical memory (or RAM) is where the programs and variables are stored whilst they are working. Virtual memory is only used when the computer runs out of physical memory. Virtual memory is just one or more files saved on a hard disk. Access to the hard disk is much slower than access to the physical memory.

What are the advantages of storage interleaving?

it stores dadta in notcontiguous mode.so when we want to allocate a memory we can do it by using pointer. it stores dada in notcontiguous mode.so when we want to allocate a memory we can do it by using pointer.

How much computer memory is in a byte?

This question is definitely too vague there are many aspects of a computer that hold measurements in bytes. If you are talking about the hard drive then 1Gb=1024Mbs. 1Mb=1024Kbs. 1Kb=1024bytes. So if you have a 160GB hard drive then you have 171798691840bytes. If you are talking about RAM same measurements apply here, if you have 2GB of RAM then you have 2147483648bytes. Generally these computer measurements are displayed in the largest categorization in most cases Gigabytes and Megabytes.

Describe different types of primary and secondary memory of a computer?

Primary memory is that which is directly connected to the motherboard for the CPU to process, meaning your RAM modules. Secondary memory is located on the hard drive in a virtual memory (called a page file or swap file) when the RAM modules have no more room to store data that is still running, but still needs to recall some as soon as it can swap out what processes have the higher priority.

When the RAM and page file are full, you will notice a lag in computer performance as it struggles to process so much data at one time. If it exceeds the limits of your memory and processor, the system may crash. A fixed large swap file and more memory makes the CPU work less and a better, faster CPU will keep the memory demands lower. This is why more memory and a faster CPU is needed for more complex data processing. To reduce processing even further, a dedicated graphics card with it's own memory and built in CPU that handles the graphic processing allows for the RAM and CPU to work much less, making the computer much more faster.

What is toggle condition in flipflops?

toggle condition :- the condition of the flip-flop in which on the application of clock-pulse inverts the present state

Q(t+1) = Q'(t) on the application of clock-pulse

for JK-flip-flop

the toggle condition is J=K=1 for JK flip-flop this is called toggle condition condition

How many bits are there in a byte?

Generally speaking, eight bits to a byte. There is no actual standard that defines how many bits are in a byte, but it has become something of a de facto standard.

Is RAM volatile or non volatile memory?

In prossesor it is volatile but in hard drive it is non-volatile.

Is primary storage volatile?

Primary storage is volatile; meaning it cannot retain data values indefinitely. In other words, when power is turned off, all contents are lost.

Secondary storage is non-volatile.

How many address lines are necessary to address two megabytes of memory?

Let N be the number of addresses line

2 megabyte = 2*1024

=2048

N = log (size in bytes) /log 2

N= log 2048/log 2

N=11

How are videos stored in a computers memory?

the text files store in the document files the sound files store in the document files the pictures files store in the document files the video files store in the document files

What is the largest ram chip available?

The biggest portion of ram per chip is currently 16GB

Does a ROM memory lose its contents when the power is switched off?

No - RAM is designed as a temporary storage space, and loses its contents when power is withdrawn.

In most designs, this happens when the computer is switched off, but in some designs, a small amount of power continues to be drawn even when the computer is "switched off" in order to maintain the RAM content. In other special design, batteries are used to provide RAM data retention over power outages.

4kb equals how many gb?

4 MB = 0.004 of a GB. There are 1024 MB's in 1 GB.

Rom is internal or external memory?

Read Only Memory is the internal memory computers use to start up reliably

Is it true that the main memory is used to store data permanently?

No. It is usually used to help run the programs your are running at that moment and store other associated data.

What were the good points about a battering ram?

the good pionts about Battering Ram was they always broke down castle and is a very strong wood

Is data easier to change in rom or ram?

ROM (Read Only Memory) contains the data necessary to start the booting process, and is put there by the manufacturer. It is not meant to be altered by the user. RAM (Random Access Memory) is the volatile memory the computer user is meant to use in processing data. It is volatile as, unless the data is saved to the hard-drive before closing down the computer, the data is lost.