Pramati Technologies interview question

Interview questions were really basic to check your knowledge about Java, JSP/Servlet, JDBC. Round1 : Telephone Call 1. What is classpath in java ? 2. What is Object ? 3. Which methods are there in Object class? 4. Tell about immutable class. How to create one ? 5. How do we run new thread ? Why do we prefer implementing Runnable interface over extending Thread ? 6. Difference betwee ArrayList and LinkedList in java ? 7. What happens when we do HashMap.put(,) ? Explain internal of HashMap and Hashset 8Are you comfortable with JSP / Servlet ? Round 2 : Skype Call 1. Difference Array and LinkedList ? Tell Advantages and disadvantages. 2. Exception handling: What is checked / Unchecked exception ? Java's exceptions and categories. 3. If you write custom exception which one it will be ? (checked / unchecked) 4. How do we run new thread ? Why do we prefer implementing Runnable interface over extending Thread ? 5. New features in Java (7/8) ? 6. JDBC question : Why do we use PreparedStatement ? 7. JSP / Servlet : Lifecycle of Servlet 8. When to use Get / Post ? 9. can we set attribute in HttpSession