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Digital Computer Electronics

Digital Computer Electronics
Which of the following Boolean algebra rules is wrong?

1 + A = 1
0 + A = A
A + A = A
None of these
1 . x = 1

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

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

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Digital Computer Electronics
Which of the following is not true?

0 x 1 = 1
1 x 1 = 1
1 x 0 = 0
0X0 = 0
None of these

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Digital Computer Electronics
When a transistor is cut off or saturated, transistor _____ have almost no effect

variations
circuits
stage
None of these
wave

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

OR
None of these
NOT
XOR
AND

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Digital Computer Electronics
The NOR gate is logically equivalent to an OR gate followed by an _____

XAND
AND
None of these
XOR
inverter

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