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Digital Electronics

Digital Electronics
In which of the following codes do the successive characters differ in only 1-bit position?

 2421 code
 cyclic code
 binary code
 8421 code

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Digital Electronics
An OR gate has 6 inputs. The number of input words in its truth table are

128
32
6
64

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Digital Electronics
Which of the following logic circuits is the fastest ?

 DTL.
 All have same speed.
 TTL.
 RTL.

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Digital Electronics
What is the radix of octal number system ?

 10
 8
 16
 2

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Digital Electronics
To get an excess-3 code from BCD code

 0011 is subtracted
 0110 is added
 0011 is added
 0110 is subtracted

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Digital Electronics
The devices commonly used for making digital circuits are

 semiconductor devices
 mechanical switches
 contact switches
 relays

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