# Recent activity by thehobo03

1
The least number of temporary variables required to create a three-address code in static single assignment form for the expression $q + r / 3 + s - t * 5 + u * v/w$ is__________________.
2
The output $F$ of the below multiplexer circuit can be represented by $AB+B\bar{C}+\bar{C}A+\bar{B}\bar{C}$ $A\oplus B\oplus C$ $A \oplus B$ $\bar{A} \bar{B} C+ \bar{A} B \bar{C}+A \bar{B} \bar{C}$
3
Consider a magnetic disk containing 400 sectors per track. An application needs to read 100 randomly scattered sectors for loading the libraries at start up. Reading each sector requires exactly one disk access. The average seek time of the disk to a random location is given ... Rotational speed of the disk is 6000 rpm. How long does it take to load libraries at start up to run the application?
4
The solution of an = 2an-1 + 1 where a0 = 1 is ? Please use the substitution method because I seem to have problem understanding it.
5
Ms. Jones has 10 books that she is going to put on her bookshelf. Of these, 4 are mathematics books, 3 are chemistry books, 2 are history books, and 1 is a language book. Ms. Jones wants to arrange her books so that all the books dealing ... the same subject are together on the shelf. How many different arrangements are possible? Please provide a different explanation rather than the textbook one.
6
How many ways we can put 5 letters L1, L2, L3, L4, L5 in 5 envelopes e1, e2, e3, e4 and e5 (at 1 letter per envelope) so that i. no letter is correctly placed? ii. at least 1 letter is correctly placed? iii. exactly 2 letters are correctly placed? iv. at most 1 letter is correctly placed? v. at least 1 letter is wrongly placed? vi. exactly 1 letter is wrongly placed?
7
Show that the following statement is a tautology using Truth Table ( p ^ q) --> p I have some minor doubts in this seemingly simple question. First a tautology is a statement which is always True, but while solving the question we get 1 False value, so how is still called a tautology?