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

Correct Answer:  D. NAND

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

Correct Answer:  B. 2n

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

Correct Answer:  A. 1111012

14. Multiplication of 478 by 528 is

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

Correct Answer:  C. (3146)8

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

Correct Answer:  C. A+BB+A

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