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Digital Electronics

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

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

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Digital Electronics
One bit full adder has ________ outputs.

 2
 4
 any number
 3

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Digital Electronics
8421 code is

 weighted code
 alphanumeric code
 self-complementing code
 non-weighted code

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Digital Electronics
The codes in which each successive code word differs from the preceding one in only one bit position are called

 self-complementing codes
 sequential codes
 BCD codes
 cyclic codes

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Digital Electronics
A device which converts BCD into octal is called

 encoder
 decoder
 code converter
 demultiplexer

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