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Core Java JVM Architecture OOPs Concepts in Java HashCode and Equals method in Java Synchronization in java StringBuffer and StringBuilder in Java Why Strings are Immutable in java Interface in Java Abstract Class in Java Implementing equals() and hashcode() Covariant Return Type in Java Association, Aggregation, Composition Equals and HashCode in java Serialization in Java What Are Marker Interfaces In Java How Join() method works How HashMap works in Java ConcurrentModification Exception Stack and heap in Java Deep Copy and Shallow Copy

Hibernate Hibernate Framework - Overview Difference between JDBC and Hibernate EJB Differences between EJB 2 and EJB 3 Session bean in EJB Difference between Stateful and Stateless session Difference between HTTPSession and Stateful  Web Services How to handle JAX-WS Exceptions and Faults Testing the SOAP web services using SOAP UI Creating SOAP Web Services using JAX-WS High-level differences to JAX-RPC Introduction to SOAP based Java web services Difference between JAX-RPC, JAX-WS, JAX-RS What is Web services Types of Web Services REST Web services