Java interview questions for 3 years of experience candidate....

Here i am listing all the interview question, who is having 3 years of experience.

Hibernate Related Question:

• What is the difference between session.get() and session.load() method in hibernate ?
• What is the difference between session.update() and session.merge() ?
• What is first level and second level cache in hibernate ?
• Can we access a data from data base without using primary key ?
• How to use composite key in hibernate, how to retrieve and store the data using composite key ?
• How to communicate with multiple data bases like mysql and oracle from hibernate ?
• What is the schema in hibernate, How to use it and when to use it ?
• What is the relationship in hibernate , what are the types and how to declare it ?
• How to make a pojo as an entity in Hibernate ?
• What is the difference between eager and lazy loading in hibernate and how to configure it ?
• What is dirty checking in hibernate ?
• What optimistic and pessimistic locking in hibernate ?
• What is the purpose of @Version ? 
• Dirty checking in hibernate ?
• What is scalar and how to use it ?

JDBC Related Questions:

1. How to use jdbc transaction, when it will start the transaction in jdbc code?
2. What is connection pooling, how to configure and how it will work ?
3. What are the steps to write a jdbc program ?
4. What is the difference between statement, prepared statement and callable statement in jdbc ?
5. How to store image in data base using jdbc, what parameter we have to use to store image ?
6. How to call a stored procedure in jdbc ?

Spring IOC Related Questions:

1. What are the IOC container in spring ?
2. How many types of handler mapping and how to configure,what is the  difference among them ?
3. Different types of controllers 
4. Different types of view resolver ?
5. How many types of injection are there in spring IOC ?Which one is better ?
6. What is Inversion Of Control ?
7. What is dependence injection ?
8. What is the scope and how many types of scope are there in spring IOC ?
9. What is the difference between singleton and prototype ?
10. what is the difference between application context and bean factory container in spring IOC ?
11. What are the interceptor in spring IOC ?
12. How the IOC container will read the spring configuration file, if we have a customized spring configuration name ?
13. what is the context listener in web.xml file, how to configure the context listener in web.xml file to read the spring configuration file ?
14. 
    

Spring MVC Related Questions:

1. What are the annotations, which you used in your project ?
2. What is @Qualifier annotation in spring mvc ?
3. What is @Autowired annotation in spring mvc ?
4. How to enable annotation in  spring mvc ?
5. How to read the annotation from the controller in spring mvc, what we have to declare in the spring configuration file ?
6. What is the Spring MVC flow, Explain with diagram ?
7. what is the difference between @RestController and @Controller in spring MVC ?
8. What is @Required annotation and at what situation we have to use it in spring MVC ?
9. What scope do we have to use to get the new object for every request in spring ?
10. What is Multipart file and what is the use of it ?
11. what is the Inversion of Control in spring ?
12. How to schedule a bean in spring ?
13. How to restrict the service provide to send only the xml format data and how to send only the XML formatted data from spring MVC controller ?
14. What is @InitBinder in spring mvc ?
15. What is @Pattern annotation in spring mvc ?
16. What are the customer property editor in spring mvc ?

J2SE Related Questions:

1. What is the purpose of  extends and super key words in Generics, When to use it ?
2. What is the purpose of generics in Java ?
3. What is OOP'S concepts in Java ?
4. What is the difference between exception and error, How to handle them using java ?
5. What is the difference between ArrayList and Linked List ?
6. What is the difference between HashMap and HashSet ?
7. What is the difference between Comparable and Comparator ?
8. What is the difference among String , StringBuilder and StringBuffer ?
9. What is the life cycle of Thread in java ?
10. What is the difference between Yield and Sleep method in Thread class ?
11. What is the difference between Join, Yield and Sleep method in Thread class in java ?
12. How to sort the elements in ArrayList ?
13. What is the difference between Abstract class and Interface, Where to use it ?
14. What are the features on java 1.5,1.6,1.7 and 1.8 ?
15. What is the HashSet and TreeSet in collections ?
16. What is String and how to replace a new string value from the  existing string value ?
17. How to find the file is empty or not using File IO package ?
18. How to find the file is exist or not using the file IO package ?
19. How to read the specified line from a file using File IO package ?
20. What is the difference between File Input Stream and Buffered Input Stream in File IO package ?
21. What if File Reader and File Writer ?
22. Which way is the better way to implement multi threading either implementing Runnable  interface or extending Thread class ? 
23. what is Aggregation and composition in java ?
24. what is is-a ,has-a relationship in java ? 

Restful Web Service related questions:

1. How to consume a json object in restful web services ?
2. How to access restful web services from client application ?
3. What is query param in restful web services of jersey ?
4. What is the Path Param in restful web services ?
5. What is the different between POST and PUT annotation in restful web services ?

SOAP Web Services related questions:

1. what is schema in SOAP web services ?
2. What is the top down and bottom up approach ?
3. Which approach did you followed in your project for SOAP ?
4. How to access the SOAP web services from client application ?

MySQL related questions :

1. How to copy the data from one table to other table ?
2. How to find only the unique records from the table where there are duplicate records is exists?(Distinct)
3. How to fetch the last 10 records from a table ?
4. what is sub queries and co related sub queries ?