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Interview Questions and Answers - Order By Newest

   
 Q31. Difference between JDBC and Hibernate ?Database
Ans. JDBC is a standard Java Api for Database communication whereas Hibernate is an ORM framework that uses JDBC to connect with Database.

Hibernate is another layer of object table mapping over JDBC that provide a database independent, object oriented and an efficient way of database communication.

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   Like         Discuss         Correct / Improve     JDBC  Hibernate  JDBC vs Hibernate     Asked in 3 Companies


  Q32. What is database Normalization ?Database
Ans. https://en.wikipedia.org/wiki/Database_normalization

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   Like         Discuss         Correct / Improve     normalization  database     Asked in 35 Companies      intermediate        frequent


 Q33. What is the difference between Oracle , Cassandra and Redis ?Database
Ans. Oracle is a relational database. Cassandra is a noSQL Database whereas Redis is an inmemory cache.

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   Like         Discuss         Correct / Improve     oracle  casandra  redis


 Q34. What is the order in which triggers gets fired ?Database
Ans. There is no specific order in which database fires the triggers if they are for the same operation. If we need to have a specific order for their execution, we should have them all in a stored procedure and the procedure should get executed upon the event.

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   Like         Discuss         Correct / Improve     oracle  database  triggers  sequence of trigger execution  sequence in which triggers gets fired     Asked in 1 Companies


 Q35. What is the difference between JDBC, Hibernate and ODBC ?Database
 This question was recently asked at 'Oracle Argentina'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     jdbc  odbc  hibernate  jdbc vc odbc  jdbc vs hibernate     Asked in 1 Companies


 Q36. How different is the Search algorithm when we query Cassandra Tables and When we query Oracle Tables ?Cassandra
Ans. Relational Database uses linear search if we don't query using indices. Performance for linear search is O(n). If indices have been used , relational database uses binary search. Performance for binary search is O(Log n).

Casandra uses hash search. Performance for Hash Search is O(1).

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   Like         Discuss         Correct / Improve     cassandra vs oracle  nosql vs relational  search algorithm


 Q37. Can we override wait() or notify() ?Core Java
Ans. No, because these are final.

public final void wait() throws InterruptedException

public final void notify()

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   Like         Discuss         Correct / Improve     wait  notify     Asked in 1 Companies


 Q38. How did you use Spring in your project ? Which Spring annotations have you used in your project ?Spring
Ans. @RequestMappping

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   Like         Discuss         Correct / Improve     spring  spring annotations     Asked in 1 Companies


 Q39. Write a program to make a triangle of stars.
 This question was recently asked at 'Oracle'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve          Asked in 1 Companies


 Q40. All the meaningful words that can be formed from a phone keypad
 This question was recently asked at 'Oracle'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve          Asked in 1 Companies


 Q41. Interface vs AbstractionCore Java
 This question was recently asked at 'Oracle financial services'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     interface vs abstraction  interfacing vs abstraction  relation between interface and abstraction  How interface provide abstraction     Asked in 1 Companies


 Q42. Explain your current project architecture.Architecture
 This question was recently asked at 'Oracle financial services'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     project architecture     Asked in 1 Companies


 Q43. Explain Servlet configJava EE
 This question was recently asked at 'Oracle financial services'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     servlet  servlet config     Asked in 1 Companies


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