Java exception can be handled locally using try-catch block or can be thrown to the calling When should you prefer to throw an exception to the calling method instead of using try-catch?

Answer the following questions based on your knowledge of java exception and java text and binary I/Os:  

1. Java exception can be handled locally using try-catch block or can be thrown to the calling When should you prefer to throw an exception to the calling method instead of using try-catch?
2. Is it possible to write a program to read from a text file without handling the exception? Why should a programmer consider binary I/O instead of text I/O?
3. Suppose that you are implementing a program to write a string “সিএিই-110” in a binary file. Java provides you three different methods – writeBytes(String), writeChars(String), and writeUTF(String). How many bytes will be written by each of those method for the give string? Why should not you consider the writeBytes(String) method in this case?