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Digital Electronics

Digital Electronics
Which one of the following is an invalid state in 8-4-2-1 binary coded decimal counter

 1100
 1001
 1000
 0011

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Digital Electronics
The devices commonly used for making digital circuits are

 contact switches
 relays
 mechanical switches
 semiconductor devices

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Digital Electronics
If in a base b number system, 54/4=13, the base of the number is

 8
 6
 9
 7

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Digital Electronics
A sequence of binary digits is known as

 byte string
 word string
 bit string
 input string

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Digital Electronics
Which of the following is known as a mod-2 adder?

 X-OR gate
 NAND gate
 NOR gate
 X-NOR gate

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Digital Electronics
In digital systems, 1 byte is equal to ________ bit(s).

 2
 8
 1
 4

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