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Digital Electronics

Digital Electronics
What logic function is produced by adding inverters to the inputs of an OR gate?

 AND
 NOR
 X-NOR
 NAND

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Digital Electronics
For checking the parity of a digital word, it is preferable to use

 NAND gates
 X-OR gates
 AND gates
 NOR gates

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Digital Electronics
8421 code is

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

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Digital Electronics
How many input and output required for demultiplexer ?

None of these
 number of selection inputs and one output
 one input and one output
 one input and many output

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Digital Electronics
An all or nothing gate is the other name of

 AND gate
 X-NOR gate
 OR gate
 X-OR gate

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Digital Electronics
The effect of stray magnetic field on the actuating torque of a portable instrument is maximum when the operating field of the instrument and the stray fields are

 Perpendicular.
  Parallel.
 Inclined at 30°.
 Inclined at 60°.

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