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Digital Electronics

Digital Electronics
The switch which clears a flip-flop is know as

 Reset
 Clear
 None
 Both A and B

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

 1001
 0011
 1000
 1100

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Digital Electronics
The AND-OR realization of a combinational circuit requires three 3-input AND gates and one 3-input OR gate. This circuit can be designed using

 three 3-input OR gates and one 3-input AND gate
 four input NAND gates only
 three 3-input NAND gates and one 3-input NOR gate
None of these

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Digital Electronics
ASCII code is a

 7-bit code
 10-bit code
 8-bit code
 5-bit code

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Digital Electronics
When an input signal 1 is applied to a NOT gate, the output is ___________.

None of these
Either 0 & 1
1

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Digital Electronics
(1D)16 in BCD 8421 code is

 00100100
 00101001
 00011101
 00011111

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