Placement Papers - Patni

This is what was asked in Patni     Interview. It was Java based interview.
     
     1.Difference between protected, public and Private .
     2. Difference between java and c. Why java is Machine Independent ?
     3. can java class file run on UNIX platform.
     4 What is package. use of package.
     5 Limitation on definition of class in package.
     6 Try catch. throws, throwable.---> Why do we use throws ? Why do we use     throwable ? What is the use of Finally when there is a catch already ?     final, finally, finalize ? difference
     7. what is relational database.?
     8. Types of drivers in JDBC. What is JDBC ODBC driver ?what is use of     ODBC .Why is MS access a relational database ?
     9 Why is Try catch necessary in JDBC. cant we do without that ?
     10. can we define class in servlet /JSp ? why ? ---> Important
     11.life cycle of servlet ?
     12 . Any java Editors u have used ?
     13 . difference between get and Post ?
     14. limitation of get ? how much capacity of data can u send through     that ?
     why does that limitation exist ? is it browser dependent ? what are the     types of browsers that are there ?
     15. What is servlet chaining.?
     16.What is JNDI ? use of JNDI ?
     17. when you are using JNDI in EJB ? will JNDI be necessary when you are     defining client and server on the same side ? if yes you ---->why you     dont define JNDI while executing java file ? how JNDI works ? how to     look for server side components through JNDI ? what protocol is used in     JNDI ? what do you look with JNDI ->class, method or object ?
     
     other than Java:
     18 what is SDLC
     19 what are testing methodologies that we use ?