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Digital Computer Electronics

Digital Computer Electronics
Which of the following boolean algebra statements represent commutative law

None of these
A+BB+A
A+AA
(B+C)(A.B)+(A.C)
(A+B)+CA+(B+C)

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

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

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Digital Computer Electronics
Conversion of an octal number 1438 to its decimal number is

9010
None of these
10710
9910
97110

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Digital Computer Electronics
A positive AND gate is also a negative

AND gate
None of these
OR gate
NAND gate
NOR gate

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Digital Computer Electronics
What is the decimal equivalent of 210?

1024
16
1000
4096
None of these

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Digital Computer Electronics
A NAND gate is equivalent to an AND gate followed by an inverter. All inputs must be _____ to get a low output

low
some low and some high
None of these
high
0's

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