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Digital Electronics

Digital Electronics
The output of a gate is HIGH if and only if all its inputs are LOW. It is true for

 NOR
 X-OR
 NAND
 X-NOR

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Digital Electronics
(44)8 in BCD 8421 code is

 01000100
 01100011
 00110110
 00100100

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Digital Electronics
Extended Binary Coded Decimal Interchange Code is an ________ bit code.

 16
 32
 8
 7

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Digital Electronics
The voltages corresponding to LOW and HIGH levels respectively are given below. Identify the voltages which correspond to negative logic system.

 0 V and 5 V
 –1.5 V and – 0.5 V
 5 V and 0 V
 1 V and 5 V

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

 Mask programmable
 One-time programmable
None of these
 Reprogrammable

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Digital Electronics
For the design of a combinational circuit with four inputs using only NAND gates, the number of K-maps required for the simplification process is

 2
 1
 4
 0

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