# Electronics and Communication Engineering - Digital Electronics

16.

The total number of fundamental products of three variables is

 A. 3 B. 5 C. 8 D. 16

Explanation:

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17.

As per Boolean algebra, inputs can be interchanged in

 A. OR gates B. AND gates C. both OR and AND gates D. none of the above

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18.

Medium scale integration refers to ICs with

 A. more than 12 but less than 30 gates on the same chip B. more than 50 gates on the same chip C. more than 20 but less than 100 gates on the same chip D. more than 12 but less than 100 gates on the same chip

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19.

The decimal equivalent of the hexadecimal number (3 E 8)16 is

 A. 1000 B. 982 C. 768 D. 323

Explanation:

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20.

Four memory chips of 16 x 4 size have their address buses connected together. This system will be of size

 A. 64 x 4 B. 16 x 16 C. 32 x 8 D. 256 x 1