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CitiCorp Interview Questions 1. Variable used in Threading (say t1 works on Map, t2 should work after t1 finishes) 2. Circular Linked List. how to check if a list is circular? 3. What is Hashing, what's a bucket in hashing? 4. authentication in Web Servies 5. Get Nth employee salary in Oracle.   6. Explain all the guarantees about the use of volatile keyword in the Java language from version 1.5   7. Sort a array in such a way that the duplicates are also in for ex 2 arrays 0 1 3 5 1 2 3 4 output should be 01123345 9.  spring we use Initialization Bean interface 10, Discuss method overriding in Java? 11. Discuss internals of a Hashmap? What is Role of equals() and hashcode() method in Object class? What will be behavior if we override hashcode() method to always return 1? Solution discussed here What is difference between Future and Callable interface in Java? When should I use StringBuilder class in a program? Tell me about your understand...

Where java uses encapsulation What is polymorphism Explain system.out.println How JVM works How to manage outofmemoryerror How to handle error in Java What's is xMS and xmx in Java in case of 2 GB RAM What is default heap size Why segregation is there in error code of webservices Which are required to handle Difference between abstraction and interface Why to use abs where to use Interface What is DI What is connection between di and interface @autowired How to connect to multiple database in hibernate What is threadsafe in hibernate How to handle exception Try with resources closing Where to use finally How to map custom exception What is index Which Algo index uses How does it works Differ between primary key and unique key How to check db performance What is DI How to configure Jenkins Retrospective call in agile How to manage a team Project deployment cycle

Hi You might get tomcate 404 error when accessing localhost:8080 what option you can use here is Solution Go to server configuration Go to Server location and select "Use Tomcat Installation" This should resolve you error.