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

22. 

Conversion of an octal number 1428 to binary number is

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

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

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

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