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Digital Electronics

Digital Electronics
Four ROM chips of 16 × 4 size have their address buses connected together. This system will be of size

 16 × 16
 64 × 4
 32 × 8
 256 × 1

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Digital Electronics
The NOR gate can function as a NOT gate if

 one input is set to 0
 inputs are left open
 all inputs are connected together
 one input is set to 1

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Digital Electronics
Logic circuits are

 none of these
 hybrid circuits
 digital circuits
 analog circuits

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

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

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Digital Electronics
Choose the option which is not a code conversion standard

 Gray code
 Excess-3 code
 BCD code
 Truth code

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Digital Electronics
What is the Boolean expression for a two-input AND gate ?

 A & B
 A.B
 A + B
 A - B

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