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  Home Placement Paper Kit Technical Questions ► Java ▼

161.Differentiate between Checked Exceptions and Unchecked Exceptions?

162 What is the purpose of Void class?

163.What is the diffrence between an Abstract class and Interface

164.What is Downcasting ?

165.What is light weight component ?

167.Why there are some null interface in java ? What does it mean ?

168.What is AppletStub

169. What is the exact difference in between Unicast and Multicast object ? Where we will use ?

170. In a Container there are 5 components. I want to display the all the components names, how will you do that one ?

171. Tell me the latest versions in JAVA related areas ?

172. Suppose If we have variable ‘ I ‘ in run method, If I can create one or More thread each thread will occupy a separate copy or same variable will be shared ?

173.What is difference in between Java Class and Bean ?

174. What modifiers may be used with an inner class that is a member of an outer class?

175. What is the corresponding Layout for Card in Swing ?

176.What is meant by class loader ? How many types are there? When will we use them ?

177. How will you add panel to a Frame ?

178. What are the classes you used in Beans ?

179. What is the method to expand and collapse nodes in a Jtree

180.What is meant by vector class, dictionary class , hash table class,and property class ?

181. What are the different types of Layouts ?

182.What are the types of methods in mouse listeners ?

183. How can you call an applet from a HTML file

184.What is meant by Stream and Types ?

185.Garbage collector thread belongs to which priority ?

186. Can thread become a member of another thread ?

187.What is the method to find if a thread is active or not ?

188. Does javascript support multidimensional arrays ?

189. Can methods be overloaded based on the return types ?

190. What is the difference between java command line arguments and C command line arguments?

191. What is PortableRemoteObject.narrow() method and what is used for?

192. What is the protocol used by RMI?

193. What is a skeleton in RMI?

194. What is the difference between an if statement and a switch statement?

195.What are filters and why would you use them?

196. What does it mean to say that HTTP is stateless? How do servlets provide a possible solution to maintain state for web applications?

197. Does garbage collection guarantee that a program will not run out of memory?

198. Why Java based GUI intensive program has performance issues?

199.What modifiers may be used with a top-level class?

200.When does the compiler supply a default constructor for a class?


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