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Digital Computer Electronics

Digital Computer Electronics
How many full adders are required to construct an m- bit parallel adder?

m
m/2
None of these
m-1
m+1

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Digital Computer Electronics
A 2's-complement adder-subtracter can add or subtract binary numbers. Sign-magnitude numbers represent _____ decimal numbers, and 2's complements stand for _____ decimal numbers.

None of these
positive, negative
sign, hexa
negative, positive
hexa, sign

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Digital Computer Electronics
A _____ TTL device can sink up to 16mA and can source up to 400 MA.

Schottky
high-power
None of these
Low-power
Standard

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Digital Computer Electronics
An AND gate has 7 inputs, what is the only input word that produces a 1 output?

None of these
1111
1111111
1110000

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Digital Computer Electronics
For what logic gate the outputs in complement of the input?

XOR
OR
AND
NOT
None of these

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Digital Computer Electronics
De Morgan's second therm says that NAND gate is equivalent to a bubbled _____ gate.

AND
OR
XOR
None of these
XAND

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