Digital Electronics
When will be the output of an exclusive-OR gate is HIGH ?

 All inputs are LOW
 All inputs are HIGH
 The inputs are different
 The inputs are equal

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Digital Electronics
A PROM

 can be programmed any number of times
 is mask programmed
 is erasable by ultraviolet light
 can be programmed only once

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Digital Electronics
Positive logic in a logic circuit is one in which

logic 0 voltage level is lower than logic 1 voltage level.
logic 0 and 1 are represented by 0 and positive voltage respectively
logic 0 and, -1 are represented by negative and positive voltages respectively
logic 0 voltage level is higher than logic 1 voltage level

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