What do you mean by ROM?
ROM stands for Read Only Memory. The memory from which we can only read but
cannot write on it. This type of memory is non-volatile. The information is stored
permanently in such memories during manufacture.
A ROM, stores such instruction as are required to start computer when electricity is
first turned on, this operation is referred to as bootstrap. ROM chip are not only used
in the computer but also in other electronic items like washing machine and
microwave oven.
Types of ROM are as follows:
PROM
EPROM
EEPROM
Define Cache Memory
Cache memory is a very high speed semiconductor memory which can speed
up CPU. It acts as a buffer between the CPU and main memory. It is used to
hold those parts of data and program which are most frequently used by CPU.
The parts of data and programs, are transferred from disk to cache memory by
operating system, from where CPU can access them.
Advantages
Cache memory is faster than main memory.
It consumes less access time as compared to main memory.
It stores the program that can be executed within a short period of time
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