Question

Which of the following best describes the fusible-link PROM?

(a) Manufacturer-programmable, reprogrammable

(b) Manufacturer-programmable, one-time programmable

(c) User-programmable, reprogrammable

(d) User-programmable, one-time programmable

This question was posed to me during an interview.

Asked question is from Programmable Read Only Memory in section Memory Devices of Digital Circuits

Answer 1

The correct choice is (d) User-programmable, one-time programmable

To explain: The fusible-link PROM is user programmable and one time programmable. It means that a written program can not be reprogrammed. EPROMs can be erased and re-programmed.