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Digital Computer Electronics

Digital Computer Electronics
Which of the following logic expression is wrong?

1 + 1=0
1 + 1 + 1 = 1
None of these
1 + 0=1
1+0+1 = 1

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

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

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Digital Computer Electronics
An OR gate has 6 inputs. How many input words are in its truth table?

64
32
128
16
None of these

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Digital Computer Electronics
The m-bit parallel adder consists of:

None of these
(m+1) full adders
m full adders
m/2 full adders
m-1 full adders

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Digital Computer Electronics
The time required for a pulse to decrease from 90 to 10 percent of its maximum value is known as

rise time
None of these
decay time
propagation delay
binary level transition period

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Digital Computer Electronics
The functional difference between SR flip-flop and JK flip-flop is that

JK flip-flop is faster than SR flip-flop
JK flip-flop has a feed back path
None of these
JK flip-flop accepts both inputs 1
JK flip-flop does not require external clock

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