Directi Placement Paper 2011 NSIT New Delhi

Directi Placement Paper 2011 NSIT New Delhi
1)differnece between HTTP Get and HTTP POST
2) how many BST can be  made from 5 different digit
3)what is minimum time in 2nd maximum number can be found from a given list of n integer.
4)there are five finger in our hand ( thumb,index,middle,ring,little)
if count from thumb as 1 , index as 2 , middle as 3 .....  little as 5 , now going back ring as 6 ,middle as 7 ...thumb as 9 , again going back index as 10 , middle as 11 and so on ,now which is  the 2010th finger.
5) one question is like this i dont remeber properly

main()
{
fork();
fork();
fork();
fork();

}
how many process are there at end.

6)
S(n) is a function. if applied to a number , it sums up all the digits until a single digit is obtained.
  eg: 917=9+1+7=17=8
  if D(n) is the resulting summation number i.e 8 in the above case,
  find how many such numbers exists if 1

7) In how many ways 4 horses can cross the fininsh line .
for example 2 horses can cross in this way : H1 first H2 second , H1 second H2 first,
H1 & H2 both tie.

some question are related to IP address.