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31.In a sqoop import command you have mentioned to run 8 parallel Mapreduce task but sqoop runs only 4. What can be the reason? The Mapreduce cluster is configured to …

21.How do you clear the data in a staging table before loading it by Sqoop? By specifying the –clear-staging-table option we can clear the staging table before it is loaded. …

11.How can you avoid importing tables one-by-one when importing a large number of tables from a database? Using the command sqoop import-all-tables –connect –usrename –password –exclude-tables table1,table2 .. This will …

1.What is the role of JDBC driver in a Sqoop set up? To connect to different relational databases sqoop needs a connector. Almost every DB vendor makes this connecter available …

41.What is Join point? This represents a point in your application where you can plug-in AOP aspect. You can also say, it is the actual place in the application where …

31.How do you turn on annotation wiring? Annotation wiring is not turned on in the Spring container by default. So, before we can use annotation-based wiring, we will need to …

21.What is default scope of bean in Spring framework? The default scope of bean is Singleton for Spring framework.

11.What are types of IoC containers? Explain them. There are two types of IoC containers: Bean Factory container: This is the simplest container providing basic support for DI .The BeanFactory …

1.What is Spring? Spring is an open source development framework for enterprise Java. The core features of the Spring Framework can be used in developing any Java application, but there …

41.How to create a session in servlet? You would get HttpSession object by calling the public method getSession() of HttpServletRequest, as below: // Create a session object if it is …