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Digital Computer Electronics

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

OR
NOR
NAND
None of these
AND

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Digital Computer Electronics
The reduced form of the Boolean expression (A+B)(A+C) is:

AC+B
AB+AC
A+BC
None of these
A+B+C

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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
sign, hexa
negative, positive
hexa, sign
positive, negative

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Digital Computer Electronics
An OR gate can be imagined as

MOS transistors connected in series
All of these
None of these
switches connected in series
switches connected in parallel

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Digital Computer Electronics
A combinational logic circuit which is used when it is desired to send data from two or more source through a single transmission line is known as

decoder
multiplexer
encoder
None of these
demultiplexer

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Digital Computer Electronics
Which function positive logic is equivalent to OR function in negative logic?

NOT
None of these
OR
AND
NOR

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