# Computer Science - Digital Computer Electronics

### Exercise :: Digital Computer Electronics - Section 5

11.

Which of the following is a universal gate?

 A. AND B. OR C. EX-OR D. NAND E. None of the above

Explanation:

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12.

The number of input words in a truth table always equals _____ where n is the number of inputs bits.

 A. 10n B. 2n C. 4n D. 8n E. None of the above

Explanation:

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13.

Conversion of decimal number 6110 to it's binary number equivalent is

 A. 1111012 B. 1111002 C. 1100112 D. 0011012 E. None of the above

Explanation:

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14.

Multiplication of 478 by 528 is

 A. (3144)8 B. (4147)8 C. (3146)8 D. (3184)8 E. None of the above

Explanation:

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15.

Which of the following boolean algebra statements represent commutative law

 A. (A+B)+CA+(B+C) B. A.(B+C)(A.B)+(A.C) C. A+BB+A D. A+AA E. None of the above