Self-Review Questions

1. Given the following local variable declarations:

   String a = "abc";
   String s = a;
   String t;
   

   What is the value of the following statements?
    
   1. __________ 'b' + 2 == 'd'
       
   2. __________ (char)('5' - 0)
       
   3. __________ t.length()
       
   4. __________ s == a
       
   5. __________ 5 + a
       
   6. __________ a.toUpperCase()
       
   7. __________ (a.length() + a).startsWith("a")
       
   8. __________ "Algorithm".indexOf("r")
       
   9. __________ "Algorithm".substring(0,4)
       
   10. __________ "Algorithm".substring(2).startWith("go")
        
   11. __________ a.substring(1) == "bc"
        
   12. __________ "ab".compareTo("ac")
        

    

2. Write a method that counts vowels in a string.

    

3. Caesar's cipher. In this cipher each letter in the text is replaced by a letter some fixed number of positions down the alphabet. For example, with a shift of 3, A would be replaced by D, B would become E, and so on. Implement Caesar's cipher.