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Digital Electronics

Digital Electronics
How many numbers are used in the decimal number system?

None of these
 0 to 9
 0 to 10
 1 to 10

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Digital Electronics
Which one of the following even parity codes are in errors. (I)100110010 (II)011101010 (III)10111111010001010

 Only (II)
 Both (II)&(III)
 Only (III)
 Both (I)&(III)

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Digital Electronics
The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either

 an X-OR or an X-NOR
 a NAND or a NOR
 an AND or an X-NOR
 an OR or a NAND

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Digital Electronics
The 7-bit Hamming code is used to transmit

 3 data bits
 no data bits
 7 data bits
 4 data bits

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Digital Electronics
An AND gate can be imagined as

 transistors connected in series
 switches connected in parallel
 switches connected in series
 transistors connected in paralle

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Digital Electronics
Which of the following is not a transmission medium?

  Modem.
 Microwave systems.
 Coaxial cables.
 Telephone lines.

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