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Digital Electronics

Digital Electronics
What is the minimum number of two-input NAND gates used to perform the function of 2-input OR gate?

 two
 one
 four
 three

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Digital Electronics
The decimal equivalent of the highest possible address for an 8-bit address bus is

 256
 128
 255
 8

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Digital Electronics
The time required for a gate to change its output is called as

 propagation time
 start time
 run time
 Decay time

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Digital Electronics
A half adder is a ________ circuit.

 None
 Sequential
 Both A and B
 Combinational

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Digital Electronics
NOT gates are to be added to the inputs of which gate to convert it to a NOR gate?

 AND
 OR
 X-NOR
 NAND

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Digital Electronics
A system has following negative numbers stored in binary form as shown. The wrongly stored number is

 -48 as 11101000
 -32 as 11100000
 -37 as 11011011
 -89 as 10100111

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