Interface vs Abstract Class Polymorphism What is static..use of it? Iterator vs ListIterator Arrays vs ArrayList vs LinkedList Comaparable vs Comaparator HashTable vs HashMap vs TreeMap If I want to pass some data through n/w....which collection u will use (ArrayList or LinkedList)? Collection heirarchy Collection vs Collections JDBC steps Prepared Statement Implicit objects in JSP Spring MVC architecture Which spring verion u use....if annaotations use..name few use of @Autowired <context: component-scan> and <context: annotation-config> Types of cache in Hibernate how do u configure hibernate in spring