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Digital Electronics

Digital Electronics
The only function of NOT gate is to ___________.

Invert input signal
Stop signal
None of these
Act as a universal gate

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Digital Electronics
The voltage levels for negative logic system

 must necessarily be positive
 may be negative or positive
 must necessarily be 0 V and –5 V
 must necessarily be negative

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Digital Electronics
What is the gray code for the binary 101011?

 011111
 110101
 111110
 101011

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Digital Electronics
(11011) 2 in BCD 8421 code is

 11011001
 01101100
 00100111
 00011011

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Digital Electronics
When will be the output of an AND gate is HIGH if there are three inputs, A, B, and C ?

 A = 1, B = 1, C = 1
 A = 0, B = 0, C = 0
 A = 1, B = 1, C = 0
 A = 1, B = 0, C = 1

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Digital Electronics
If a Hexadecimal number needs to convert to binary. For each hexadecimal digit, there will be how many bits

 1
 4
 2
 8

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