1) Given the daily stock prices of a share during last 30 days, write a program to find out best buying and selling dates for maximum gain.

 for ex: index 0   1  2  3  4  5  6
 int[] array= {10,05,04,12,32,04,35};
in this case, buying at index 5 and selling at index 6, would give you the max price gain of 31(35-04)

2) In an Array – Find an element which appeared most.

for Ex: int array[] = {6,4,5,7,3,6,4,7,6,2,9,6}
  in this 6 is the most appeared number and appeared 4 times.

3)Find Duplicate Characters in a String  

for ex: 
 If you enter 'Repeated' output should be
  e – 3 times
 If you enter 'Ramsamkamdamyumnum'
   a -4 times
   m – 6 
   u – 2

4) Write a program to simulate a deadlock situation?

5) Print first non-repeated character in String?

6) Write a program to find a number of vowels and consonents in a String?
7) Find duplicates in an array if there is more than one duplicate?