Java J2ee Planet

371 managed persistent entity bean ? 372 What is J2EE ? 373 What is JTS ? 374 How many entity beans used and how many tables can u use in EJB project ? 375 What is scalable,portability in J2EE? 376 What is Connection pooling?Is it advantageous? 377 Method and class used for Connection pooling ? 378 How to deploy in J2EE(i.e Jar,War file) ? 379 How is entity bean created using Container managed entity bean ? 380 Sotware architechture of EJB ? 381 In Entity bean will the create method in EJB home and ejbCreate in Entity 382 bean have the same parameters ? 383 What methods do u use in Servlet - Applet communication ?

302 What is meant by TCP, IP, UDP ? 303 What is the difference between TCP and UDP ? 304 What is a proxy server ? 305 What is meant by URL 306 What is a socket and server sockets ? 307 When MalformedURLException and UnknownHost Exception throws ? 308 What is InetAddress ? 309 What is datagram and datagram packets and datagram sockets ? 310 Write the range of multicast socket IP address ? 311 What is meant by a servlet ? 312 What are the types of servlets ? Explain 313 What is the different between a Servlet and a CGI. 314 What is the difference between 2 types of Servlets ?

251 What is meant by event handling ? 252 What are all the listeners in java and explain ? 253 What is meant by an adapter class ? 254 What are the types of mouse event listeners ? 255 What are the types of methods in mouse listeners ? 256 What is the difference between panel and frame ? 257 What is the default layout of the panel and frame ? 258 What is meant by controls and types ? 259 What is the difference between a scroll bar and a scroll panel. 260 What is the difference between list and choice ? 261 How to place a component on Windows ? 262 What are the different types of Layouts ? 263 What is meant by CardLayout ?

201 Name 2 classes that can store arbitrary number of objects ? 202 What is the difference between java.applet.* and java.applet.Applet ? 203 What is a default package ? 204 What is meant by a super class and how can you call a super class ? 205 What is anonymous class ? 206 Name interfaces without a method ? 207 What is the use of an interface ? 208 What is a serializable interface ? 209 How to prevent field from serialization ? 210 What is meant by exception ? 211 How can you avoid the runtime exception ? 212 What is the difference between throw and throws ? 213 What is the use of finally ? 214 Can multiple catch statements be used in exceptions ? 215 Is it possible to write a try within a try statement ? 216 What is the method to find if the object exited or not ? 217 What is meant by a Thread ? 218 What is meant by multi-threading ?

151 Checked & Unchecked exception 152 Use of throws exception 153 What is finally in exception handling 154 Vector class 155 What will happen to the Exception object after exception handling 156 Two types of multi-tasking 157 Two ways to create the thread 158 Synchronization 159 I/O Filter 160 How can you retrieve warnings in JDBC 161 Can applet in different page communicate with each other 162 Four driver Manager 163 Features of JDBC 2.0 164 Explain about stored procedures 165 Servlet Life cycle 166 Why do you go for servlet rather than CGI 167 How to generate skeleton & Stub classes 168 Explain lazy activation 169 What is meant by Java ?

101 How do you download stubs from a Remote place ? 104 What is the main functionality of the Prepared Statement ? 105 What is meant by static query and dynamic query ? 107 What is meant by Servlet? What are the parameters of the service method ? 108 What is meant by Session ? Tell me something about HTTPSession Class ? How do you invoke a Servelt? What is the difference in between doPost and doGet methods ? 109 What is the difference in between the HTTPServlet and Generic Servlet ? Expalin their methods ? Tell me their parameter names also ? 110 Have you used threads in Servelet ? 111 Write a program on RMI and JDBC using StoredProcedure ? 113 In a Container there are 5 components. I want to display all the components names, how will you do that one ?

1. What are the four corner stones of OOP ? Abstraction, Encapsulation, Polymorphism and Inheritance. 2. What do you understand by private, protected and public ? These are accessibility modifiers. Private is the most restrictive, while public is the least restrictive. There is no real difference between protected and the default type (also known as package protected) within the context of the same package, however the protected keyword allows visibility to a derived class in a different package. 3. Difference between a Class and an Object ? A class is a definition or prototype whereas an object is an instance or living representation of the prototype. 4. What is Downcasting ? Downcasting is the casting from a general to a more specific type, i.e. casting down the hierarchy. 5. What is Polymorphism ? What kinds ? 6. What is the difference between method overriding and overloading? Overriding is a method with the same name and arguments as in a parent, whereas...