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Digital Electronics

Digital Electronics
8421 code is

 alphanumeric code
 non-weighted code
 weighted code
 self-complementing code

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Digital Electronics
For a code to be self-complementing, the sum of all its weights must be

 6
 10
 9
 12

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Digital Electronics
Why small bubble is given on the output of the NAND gate symbol ?

 Open collector output
 Output is inverted
None of these
 Tristate

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Digital Electronics
The only function of NOT gate is to ___________.

None of these
Invert input signal
Act as a universal gate
Stop signal

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Digital Electronics
What logic function is produced by adding an inverter to each input and output of an OR gate?

 NAND
 X-OR
 NOR
 AND

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Digital Electronics
An AND gate can be imagined as

 transistors connected in series
 switches connected in parallel
 switches connected in series
 transistors connected in paralle

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