//design patterns //markers interface // example of functional interface . can you override Default method. Can you directly or do you need object. give some examples of functional interface //one try catch finally question asking for output using a function calling int a=10; int b=0; try { sout("10"); int c=a/b; return 1; } catch(Exc e) { sout("11"); return -1; } finally { sout("13"); } //hibernate diff load and get . which is effeicent and why //how to write a insert query in mongodb and explain sharding and aggresgartion working. //diff between hashmap and hashtable //diff between Synchorizedhashmap and Hashtable //comparable and compartor -->> Annyomous classes (why it is needed sometimes) //hascode and equals differnce //diff between ConCurrentMap and HashTable // what is immuatble class. How to create one. Give me some examples why spring is immuatble class(When to use immuatble class). what is SpringTokenizer. //write a singleton design pattern //simple springboot question on multiple beans . want to know the qualifer annotation. //what is difference between @Autowired and @Resource annotations. //if you want to use other than tomcat server . how to embedded that in springboot. //have you ever worked in spring core. //what is microservice .how they are communicating how you were using resttemplate in ur project . //what is CORS in springBoot ? @CrossOrigin ?? //what is transactional in java and @Transactional in spring?