CreatioSoft interview question

5 programming questions 1. write a program to count words in string 2. write a program to reverse word in string like if input is "this is it" then o/p "it is this" 3. write a program to reverse linked list in linear complexity 4. write a program for decimal to binary conversion. 5. program to print tree nodes. I forgot actual question one more program program to find largest palindrome in string