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Digital Electronics

Digital Electronics
What logic function is produced by adding inverters to the inputs of an OR gate?

 X-NOR
 NOR
 NAND
 AND

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Digital Electronics
Which of the logical operations is represented by the + sign in Boolean algebra ?

 NOT
 NAND
 OR
 AND

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

 1100
 1000
 1001
 0011

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

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Digital Electronics
The field, which is never present in an assembly language statement, is

 Comment
 Opcode
 Continue
 Operand

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Digital Electronics
Which of the following is a self-complementing code?

 XS-3 code
 cyclic code
 Gray code
 Hamming code

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