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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
Advantages of virtual machine architecture for a user?
The main advantages are that multiple OS can co-exist on the same computer in strong isolation from each other and tha it can provide an istruction set archtecture(ISA) different from that of the real machine.The main advantages are that multiple OS can co-exist on the same computer in strong isolation from each other and tha it can provide an istruction set archtecture(ISA) different from that of the real machine.
Basically, it has two major functions: store data to a given address and retrieve data from a given address.
What is the Ram size of super computer?
Current supercomputers usually have gigawords of RAM and terawords of Disk. A word might be 64 to 128 bits in length, longer on some machines. Memory is not usually addressed by bytes but by whole words.
- DDR2 = Dual Data Rate Version 2
- DIMM = Dual Inline Multichip Module
Yes. A SIMM is a single in-line memory module. All this really means is that contacts on both sides of the module are redundant. SIMM was replaced with DIMM (dual in-line memory module).
What is the impact of semiconductor memories?
Semiconductor RAM (Random Access Memory) chips were first used in computers and other electronic equipment back in the late 1960's. They rapidly became popular because they were very much cheaper to manufacture than the magnetic core memory stacks (which themselves had replaced even older devices such as physical wave delay lines) which were, up to then, the only form of RAM available for mainframe or minicomputer manufacturers to use. The main impacts of the introduction of semiconductor RAMs were: * the possibility to install much larger amounts of logical RAM in computers * housed in a very much smaller physical space * taking very much less power and * at a much lower cost per unit of memory than was ever possible using magnetic core memory stacks. As a result: * the use of semiconductor RAM soon led to closure of most factories set up by mainframe manufacturers after World War II to make magnetic core memory stacks. Relatively few workers are needed in a factory making semiconductor RAM chips and circuit boards compared to one making magnetic memory stacks having the same amount of logical RAM * along with the availability of microprocessor chips, semiconductor RAM made possible the rapid introduction of powerful, yet very cheap, minicomputers * instead of making mainframe computer systems, manufacturers were soon forced to switch their production mix to make far less mainframes. Factories which had been making relatively few massive mainframes were soon full of the quite different production lines needed to make thousands of minicomputers, pcs and server systems.
Proof:
P{T>n+m/T>n}=P{T>n+m,T>n}/P{T>n}
(Bayes theorem)
=P{T>n+m}/P{T>n}
=((1-p)^(n+m))/(1-p)^n = (1-p)^(n+m-n) = (1-p)^m
(1-p)^m = {T>m}
So T>m has the same probability as T>m+n given that T>n, which means it doesn't care (or don't remember) that n phases had passed.
Hello,
same problem here, trying to solve it. probably it's a missing file. on this computer the major problem is a hard drive failure. I will try to replace spoolsv.exe in windows/system32 directory with a new one. You might give it a go.
hope it helps
What is segmentation in computer memory?
memory segmentation is the process of dividing the computer memory into different overlapping segments.
What is the cache memory used for?
Cache is a high speed buffer memory for storing automatically small areas of frequently used memory, so that the machine does not have to wait for the full memory access time every time it needs to access the data in those areas.
Most computers have separate but similar cache memories for data and instructions. This allows the same access time advantages for both, but as data and instructions are usually in different places in memory eliminates any conflicts in usage.
Some computers have multiple levels of different speed cache with different sizes. These are typically referred to as L1 cache, L2 cache, L3 cache, etc. with L1 being the fastest, most expensive, smallest size cache closest to the processor; the others are successively closer to the main memory.
Varies from machine to machine:
- many early machines had address busses only 12 to 18 bits wide
- early microprocessors has address busses 10 to 14 bits wide
- 16 bit address busses were common on microprocessors in the early 1980s
- the 8086 had a 20 bit address bus and the 68000 a 24 bit address bus
- most modern computers have 32 bit address busses with high-end ones having as many as 64 bit address busses
Windows 95
Windows 97
Windows ME
Windows NT
Windows 2000
Windows XP
Windows Vista (Don't, it sucks)
Windows 7
Macintosh
Linux
How many bits are required to represent double data type in memory?
It differs slightly depending on what platform your computer uses or what language you are using.
for the Java programming language, which is platform independent, it is 64-bits.
How is 110 volts and 220 volts measured?
With a voltmeter Keep volt meter terminal on phase and neutral wire and it will show the exact volatage
Why is is auxiliary memory required?
Auxillary memory is required so that set of instruction given first stored in temorary memory which can be edited & then can be stored
What are some examples of bistable devices?
light bulb and television. These are considered to be bistable devices because they can only be in 2 states. It's either they are on or they are off.
