what happens if we give return type to constructor ? what happens if we give final to class ? super class of all Exception type classes ? what is serialiazation ? Exception thrown by loadclass() method of ClassLoader class ? All the variables of interface should be ? What is it called where child object gets killed if parent object is killed ? method overloading signature ? What is runTime Polymorphism ? Internal implemtation of hashmap? Design pattern - abstarct pattern, factory pattern, singleton Pattern ? Write code for singleton pattern ? Why to give private for constructor ? what is garbage collection ? What is String Constant pool ? What is aggregation and composition ? Difference between linkedList and ArrayList ? Difference between comparator and comparable ? Which collection preserve insertion order ? What is hashcode and equals contract ? Different types of Exceptions ? What is InstanceOf ? What is Encapsulation ? What is Dependency injection ? What are Session method ? What to do to secure webflows with spring security ? What is hibernate.dialect property in hibernate configuration ? what are different state of objects in hibernate ? Interfaces of hibernate ? Write an SQL query to print the second highest salary of employees ? Difference between rest and soap ? Spring boot Data JPA ? Methods of Rest ? Why angular or react ? Architectural Difference between your proj and angular ? Java 8 new features ? Difference between java7 and java 8 ?