Questions with Answers on Network Applications

What are Relational databases?
Define SQL, JDBC ,Applets, World Wide Web and HTML.
Explain Graphical user interfaces(GUI).
What is AWT ,graphics and sound?
Explain client/server computing.
What are networking, ports and SMTP (email)?
What Java beans and Remote method invocation (RMI)?
Explain IDL and CORBA.
Explain Servlets ,Security ,Packaging.