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Digital Electronics

Digital Electronics
Which of the following is 2’s complement of +12?

 01110011
 00000011
 00001000
 00001100

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Digital Electronics
The number of parity bits in a 12-bit Hamming code is

 8
 4
 5
 6

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Digital Electronics
A hexadecimal odometer displays F 52 F. The next reading will be

F53O
F53F
F52E
G52F

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Digital Electronics
The simplified block diagram of a 10-bit A/D converter of dual slope integrator type is shown in figure. The 10-bit counter at the output is clocked by a 1 Mhz clock. Assuming negligible timing overhead for the control logic, the maximum frequency of the analog signal that can be converted using this A/D converted is approximately .

  1 KHz.
 2 KHz.
 250 Hz.
 500 Hz.

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Digital Electronics
The logic expression A + B can be implemented by giving inputs A and B to a two-input

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

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Digital Electronics
The output of a gate is HIGH if and only if all its inputs are LOW. It is true for

 X-NOR
 NOR
 NAND
 X-OR

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