Why does microprocessor contain ROM chips?
– Microprocessor contain ROM chip because it contain instructions to execute data. • What is the difference between primary & secondary storage device? – In primary storage device the storage capacity is limited. It has a volatile memory. In secondary storage device the storage capacity is larger. It is a nonvolatile memory. Primary devices are: RAM / ROM. Secondary devices are: Floppy disc / Hard disk. • Difference between static and dynamic RAM? – Static RAM: No refreshing, 6 to 8 MOS transistors are required to form one memory cell, Information stored as voltage level in a flip flop. Dynamic RAM: Refreshed periodically, 3 to 4 transistors are required to form one memory cell, Information is stored as a charge in the gate to substrate capacitance. • What is interrupt? – Interrupt is a signal send by external device to the processor so as to request the processor to perform a particular work. • What is cache memory? – Cache memory is a small high-speed memory. It is used for temporary
