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Name a nonvolatile memory.

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Name a nonvolatile memory.

(a) ROM

(b) RAM

(c) SRAM

(d) DRAM

This question was posed to me during a job interview.

Query is from Memory and Peripherals of Embedded System in section Embedded System of Embedded Systems

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Right option is (a) ROM

The best explanation: Non-volatile memory is the one which retains its content even when the power is removed. This is done by an on-chip read only memory (ROM) or an external EPROM. The software that it contains the program which is capable of obtaining the full software from another source within or outside of the system. This initialisation routine is also referred to as a bootstrap program or routine.

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