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Digital Electronics

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

 X-OR
 AND
 OR
 NAND

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

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

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Digital Electronics
In Digital Logic Designs, GAL is abbreviated as

 General Array Logic
 General Advance Logic
 Generic Advance Logic
 Generic Array Logic

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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

 64 × 4
 32 × 8
 256 × 1
 16 × 16

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Digital Electronics
What is the minimum number of NOR gates required realizing an X-OR gating?

 4
 6
 3
 5

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Digital Electronics
The binary number designations of the rows and columns of the K-map are in

 BCD code
 Gray code
 XS-3 code
 binary code

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