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Digital Electronics

Digital Electronics
The binary number 10101 is equivalent to decimal number ___________.

21
12
19
27

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Digital Electronics
NOT gates are to be added to the inputs of which gate to convert it to a NAND gate?

 OR
 AND
 X-OR
 NOT

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Digital Electronics
An X-OR gate gives a high output

 if there are odd number of 1s
 if it has even number of 0s
 if the decimal value of digital word is even
 for odd decimal value.

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

 16 × 16
 32 × 8
 64 × 4
 256 × 1

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Digital Electronics
An all or nothing gate is the other name of

 X-OR gate
 OR gate
 X-NOR gate
 AND gate

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Digital Electronics
Which of the following operations is commutative but not associative?

 OR
 NAND
 AND
 X-OR

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