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Digital Electronics

Digital Electronics
1’s complement of 17 is

 10001.
  01110.
 11100.
 10111.

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

 X-OR
 NAND
 OR
 NOR

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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

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

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

 NOR
 AND
 NAND
 X-OR

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Digital Electronics
It is desired to have a 64 × 8 ROM. The ROMs available are of 16 × 4 size. The number of ROMs required will be

 4
 6
 8
 2

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Digital Electronics
(44)8 in BCD 8421 code is

 01100011
 01000100
 00100100
 00110110

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