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Digital Electronics

Digital Electronics
A multiplexer is a combinational logic circuit used to perform the operation

 XOR-NAND
 AND-OR
 NOR-OR
 AND-AND

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Digital Electronics
In Boolean algebra, the bar sign (-) indicates ___________.

NOT operation
OR operation
None of these
AND operation

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Digital Electronics
Which of the following shows the correct attachment of even parity bit to the data 00001001?

 100001001
 000010011
 000001001
 000010010

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Digital Electronics
X OR X' will result

 1
 X'
 0
 X

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Digital Electronics
A bubbled AND gate is equivalent to a

 NOR gate
 OR gate
 X-OR gate
 NAND gate

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Digital Electronics
A computer has a word length of 8 bits (including sign). It is required to determine the range of integers that can be stored in the computer. If 1’s complement is used to represent the numbers, then the range will be

 -127 to 127
 -128 to 127
 -256 to 256
 -256 to 255

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