Ans 51: (B) Statement is True for atleast one
Ans 52: (D) NAND alone
Solution: NAND and NOR are Universal gates. we can form any circuit using only NAND and NOR
Ans 53: (C) Swap x and y
Solution : Let x=4, y=3
x=x+y=4+3=7
y=x-y=7-3=4
x=x-y=7-4=3
Now x contains 3 and y contains 4. So values are swapped
Ans 54: (B) Data Register
Ans 55: (C) Data {20,12,15,10,11,14,13}
Solution: 20
12 15
10 11 14 13
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