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Digital Computer Electronics

Digital Computer Electronics
The logic 1 in positive logic system is represented by:

negative voltage
None of these
higher voltage level
zero voltage
lower voltage level

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Digital Computer Electronics
Addition of 1101011012, 1110111012, 0001111112, 1001011012, 1111101112 is

10110101110102
None of these
11110110000102
10001010001012
10010000000102

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

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

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Digital Computer Electronics
A full-adder adds _____ bits, and producing a SUM and a _____

8, SUBTRACTION
3, CARRY
None of these
16, DIVIDE
All of these

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Digital Computer Electronics
In boolean algebra, the overbar stands for the NOT operation, the plus sign stands for the _____ operation.

None of these
AND
OR
NAND
NOR

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Digital Computer Electronics
What is the 2's complement of 0011 0101 1001 1100 number?

1100 1010 1111 1111
1100 1010 1100 1011
1100 1010 0110 0011
1100 1010 0110 0100
None of these

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