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Digital Electronics

Digital Electronics
(1D)16 in BCD 8421 code is

 00100100
 00011111
 00011101
 00101001

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

None of these
 Output is inverted
 Open collector output
 Tristate

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Digital Electronics
Why generic array logic (GAL) device was invented ?

 One-time programmable
 Mask programmable
 Reprogrammable
None of these

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Digital Electronics
The 2s complement of 17 is

 110001.
  101111.
 111110.
 101110.

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Digital Electronics
Four ROM chips of 16 × 4 size have their address buses connected together. This system will be of size

 64 × 4
 32 × 8
 16 × 16
 256 × 1

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Digital Electronics
Complement of NOR and OR gate is ________ and ________ respectively.

 AND, NAND
 NOR, OR
 OR, NOR
 NAND, AND

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