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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

 0011
 1000
 1100
 1001

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Digital Electronics
1 kb represents

 100 bytes
 10,000 bytes
 1024 bytes
 1000 bytes

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Digital Electronics
A binary number system is of base ________

 4
 1
 10
 2

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Digital Electronics
A bubbled AND gate is equivalent to a

 NAND gate
 X-OR gate
 OR gate
 NOR gate

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

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Digital Electronics
9’s complement of 52784630 is

 47215369
 48225469
 58326479
 57316379

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