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Digital Electronics

Digital Electronics
Which one of the following is 2’s complement of -68?

 10111100
 01111100
 00111100
 11000100

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

 NOR
 NAND
 OR
 X-OR

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Digital Electronics
Why decoder is used in the digital electronics ?

None of these
 To convert coded information into non coded form
 It is used to separate address bus and data bus
 To convert non coded information into coded form

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Digital Electronics
F’s complement of (2BFD)Hex is

 D402
 C403
 E304
 D403

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Digital Electronics
In ULSI, the number of gate circuits per chip is

 1,00,000 to 10,00,000
 > 1,00,000
 50,000 to 99,999
 > 50,000

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Digital Electronics
In an SR latch built from NOR gates, which condition is not allowed

 S=1, R=1
 S=0, R=1
 S=0, R=0
 S=1, R=0

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