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Which of the following are types of ROMs?

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Which of the following are types of ROMs?

(a) SROM & DROM

(b) PROM & EPROM

(c) Only one type there is no further classification

(d) PROM & EROM

I have been asked this question during an online interview.

The doubt is from The Storage Unit in portion Basic Computer Organisation of Computer Fundamentals

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Right answer is (b) PROM & EPROM

The best explanation: There are two types of Read Only Memories: PROM i.e., Programmable ROM & EPROM i.e., Erasable Programmable ROM. When only a small number of ROMs with a particular memory content is needed, PROM is used and in case of EPROM, all the contents of the storage cells must be erased before the write operation.

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