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Digital Electronics

Digital Electronics
Which of the following is known as a mod-2 adder?

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

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Digital Electronics
For 4 bit parallel addition, we need ________ half adder(s) and ________ full adder(s)

 1 and 3
 1 and 4
 0 and 4
 0 and 3

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Digital Electronics
The code used in digital systems to represent decimal digits, letters, and other special characters such as + , – , . , * , etc. is

 octal
 natural BCD
 ASCII
 hexadecimal

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Digital Electronics
Counter is a

  none.
  combinational circuit.
  sequential circuit.
  both.

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Digital Electronics
The largest positive number that can be stored in a computer that has 16-bit word length and uses two’s complement arithmetic is

 32,768
 65,536
 32
 32,767

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Digital Electronics
A bubbled NAND gate is equivalent to a

 OR gate
 NAND gate
 X-OR gate
 NOR gate

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