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Digital Electronics

Digital Electronics
A bubbled NAND gate is equivalent to a

 NAND gate
 X-OR gate
 NOR gate
 OR gate

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

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

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

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

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Digital Electronics
A half adder has

 1 input and 2 outputs
 2 inputs and 2 output
 1 input and 1 output
 2 inputs and 1 outputs

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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.
 250 Hz.
 2 KHz.
 500 Hz.

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Digital Electronics
In the boolean algebra, a variable has ________ different state(s)/value(s).

 1
 2
 4
 3

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