Digital Computer Electronics
Semiconductor memory is:

a volatile memory
None of these
All of these
somewhat larger than the magnetic core memory
somewhat slower than magnetic core memory

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Digital Computer Electronics
A p- channel enhancement type MOSFET performs much the same function as a PNP transistor, except that

it is controlled by current rather than by voltage like a bipolar transistor.
it operates much faster
it is considerably larger
None of these
it is controlled by voltage rather than by current, so that it requires very little current at the control terminal

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