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  Home Placement Paper Kit Technical Questions ► Java ▼

121.What is the difference between throw and throws?

122. The statements following the throw keyword in a program are not executed. True/False?

123. What is the basic difference between string and stringbuffer object?

124. Is JVM a compiler or an interpreter?

125.How is an argument passed in Java methods?

126. Can an anonymous class implement an interface and extend a class at the same time?

127.What is the difference between 'while' and 'do while' loop?

128.What is the difference between interpreted code and compiled code?

129. What is Exception ?

130. Explain 'try','catch' and 'finally' blocks?

131. What is the use of interface?

132. What is 64 bit Java ?

133.How is '==' different from .equals() method in case of String objects?

134. How can a GUI component handle its own events?

135. What is memory leak?

136.Is sizeof a keyword?

137. What value does readLine() return when it has reached the end of a file?

138. What is a pointer and does Java support pointers?

139. Can a main method be overloaded?

140.What is the impact of declaring a method as final?

141. Can you give few examples of final classes defined in Java API?

142.What is the difference between executeQuery () and executeUpdate()?

143. How can you get an IP address of a machine from its hostname?

144.What is heap and stack?

145.Can you create an object of an abstract class?

146. Can a Class extend more than one Class?

147. What are different socket options?

148.How do you establish database connection using JDBC?

149. What is a compilation unit ?

150. Is there any tool in java that can create reports ?

151. Why does Java not support operator overloading?

152. What is casting?

153. I want to print "Hello" even before main is executed. How will you acheive that?

154. How is final different from finally and finalize?

155.What is use of a abstract variable?

156. How can you force garbage collection?

157. How many static init can you have ?

158. Does a class inherit the constructors of its superclass?

159.What happens when a thread cannot acquire a lock on an object?

160.What is singleton?


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