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Digital Computer Electronics

Digital Computer Electronics
De Morgan's first theorem says that a NOR gate is equivalent to a bubbled _____ gate.

AND
XAND
None of these
XOR
NOR

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

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

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

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

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Digital Computer Electronics
A flip-flop is a _____ element that stores a binary digit as a low or high voltage.

bus
memory
None of these
chip
I/O

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Digital Computer Electronics
The number of binary bits required to represent a hexadecimal digit is

None of these
4
6
8
3

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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

encoder
decoder
None of these
multiplexer
demultiplexer

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