11. Which of the following is a universal gate?

A. AND

B. OR

C. EX-OR

D. NAND

E. None of the above

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

A. 10_{n}

B. 2_{n}

C. 4_{n}

D. 8_{n}

E. None of the above

13. Conversion of decimal number 61_{10} to it’s binary number equivalent is

A. 111101_{2}

B. 111100_{2}

C. 110011_{2}

D. 001101_{2}

E. None of the above

14. Multiplication of 47_{8} by 52_{8} is

A. (3144)_{8}

B. (4147)_{8}

C. (3146)_{8}

D. (3184)_{8}

E. None of the above

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