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What Are Buffer And Cache Memory?

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sharath kumar Profile
sharath kumar answered
Buffer:
In computer science, a buffer is a region of memory used to temporarily hold data while it is being moved from one place to another. Typically, the data is stored in a buffer as it is retrieved from an input device (such as a keyboard) or just before it is sent to an output device (such as a printer). However, a buffer may be used when moving data between processes within a computer

cache:
In computer science, a cache is a collection of data duplicating original values stored elsewhere or computed earlier, where the original data is expensive to fetch (in terms of longer access time) or to compute, compared to the cost of reading the cache. In other words, a cache is a temporary storage area where frequently accessed data can be stored for rapid access. Once the data is stored in the cache, future use can be made by accessing the cached copy rather than re-fetching or recomputing the original data, so that the average access time is shorter.
Muddassar Nazar Profile
Muddassar Nazar answered
Buffer
A data area, shared by hardware devices or program a process is called buffer. They are operated at different speeds or with different sets of priorities. The buffer allows each device or process to operate without holding up by the other. In order to a buffer to be effective, the size of the buffer needs to be considered by the buffer designer. Like a cache, a buffer is a "midpoint holding place" but does not exist so much to accelerate the speed of an activity as for supporting the coordination of separate activities.

This term is used not only in programming but in hardware as well. In programming, buffering sometimes needs to screen data from its final intended place so that it can be edited or processed before moving to a regular file or database.

Cache Memory
Cache memory is type of random access memory (RAM). Cache Memory can be accessed more quickly by the computer microprocessor than it can be accessed by regular RAM. Like microprocessor processes data, it looks first in the cache memory and if there, it finds the data from a previous reading of data, it does not need to do the more time consuming reading of data from larger memory.

Sometimes Cache memory is described in levels of closeness and convenience to the microprocessor. An L1 cache is on the same chip like the microprocessors.
In addition to cache memory, RAM itself is a cache memory for hard disk storage since all of RAM's contents come up to the hard disk initially when you turn on your computer and load the operating system that you are loading it into RAM and later when you start new applications and access new data. RAM also contains a special area called a disk cache that consists of the data most recently read in from the hard disk.
ayesha sana Profile
ayesha sana answered
A buffer is a contemporary collection of location where a huge amount of data is managed or disassembled. This may be basic for interaction with a set of collection device that needs huge blocks of information, or when data must be given in a many way than that in which it is made, or rarely considerable when less blocks are not sufficient. The advantage is here even if the buffered data are stored to the buffer in one time and get from the buffer once.
A cache, on the other side, thinks that the data will be get from the cache more one time than they are written on them.
Its aim is to less the accesses to the underlying stock.
Buffer is a programmable cache managed by the operating system in the main storage and is used to have the most necessary data from disk, so that they don't have to be gotten again from the memory. This feature is available by the operating system. While cache is in real a hardware that the CPU uses to reduced the effective memory access time.
Anonymous Profile
Anonymous answered
Simply, buffer is temporary storage memory which stores data for temporary period e.g when we give print document command that data stores in bugger to print data.
While, Cache memory stores most frequently data and fast accessing memory and placed between  CPU and main memory.
Anonymous Profile
Anonymous answered
Memory buffer register is you are referring to or not. Confusing
Muddassar Nazar Profile
Muddassar Nazar answered
Buffer
A data area, shared by hardware devices or program a process is called buffer. They are operated at different speeds or with different sets of priorities. The buffer allows each device or process to operate without holding up by the other. In order to a buffer to be effective, the size of the buffer needs to be considered by the buffer designer. Like a cache, a buffer is a "midpoint holding place" but does not exist so much to accelerate the speed of an activity as for supporting the coordination of separate activities.
This term is used not only in programming but in hardware as well. In programming, buffering sometimes needs to screen data from its final intended place so that it can be edited or processed before moving to a regular file or database.

Cache Memory
Cache memory is type of random access memory (RAM). Cache Memory can be accessed more quickly by the computer microprocessor than it can be accessed by regular RAM. Like microprocessor processes data, it looks first in the cache memory and if there, it finds the data from a previous reading of data, it does not need to do the more time consuming reading of data from larger memory.

Sometimes Cache memory is described in levels of closeness and convenience to the microprocessor. An L1 cache is on the same chip like the microprocessors.

In addition to cache memory, RAM itself is a cache memory for hard disk storage since all of RAM's contents come up to the hard disk initially when you turn on your computer and load the operating system that you are loading it into RAM and later when you start new applications and access new data. RAM also contains a special area called a disk cache that consists of the data most recently read in from the hard disk.
Eric Profile
Eric answered
Cache is stored memory & buffer is current running memory that's partially cached.
Anonymous Profile
Anonymous answered
Cache stores data which is most frequently used or accessed by the cpu whereas buffer stores data.

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