21. The _____ gate has two or more input signals. All inputs must be high to get a high output

A. OR
B. NAND
C. AND
D. NOR
E. None of the above

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22. Conversion of an octal number 142₈ to binary number is

A. 1100010₂
B. 110110₂
C. 1100011₂
D. 1101101₂
E. None of the above

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23. Conversion of hexadecimal number 93FA₁₆ to it’s binary number equivalent is

A. 1001001111111010₂
B. 10010011111110111₂
C. 110011111110011₂
D. 111110000111₂
E. None of the above

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24. BCD numbers are useful whenever _____ information is transferred into or out of a digital system.

A. decimal
B. binary
C. ASCII
D. hexadecimal
E. None of the above

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25. A NOR gate recognizes only the input word whose bits are _____

A. 0’s and 1’s
B. 1’s
C. 0’s
D. 0’s or 1’s
E. None of the above

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