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For reprogrammability, PLDs use __________

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For reprogrammability, PLDs use __________

(a) PROM

(b) EPROM

(c) CDROM

(d) PLA

The question was posed to me during an interview.

This interesting question is from Introduction of Memory Devices in section Memory Devices of Digital Circuits

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The correct answer is (b) EPROM

The explanation: For reprogrammability, PLDs use EPROM (i.e. Erasable PROM). It erases the previous program and starts uploading a new one. However, data is erased by exposing it to UV-light, which is a tedious and time-consuming process.

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