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Understanding functional and technical aspects of VMware Spring Professional 2021 Data Management: JDBC, Transactions

The following will be discussed in VMWARE EDU-1202 exam dumps:

• What is a transaction? What is the difference between a local and a global transaction?
• What is the default rollback policy in a JUnit test, when you use the @RunWith(SpringJUnit4ClassRunner.class) in JUnit 4 or @ExtendWith(SpringExtension.class) in JUnit 5, and annotate your @Test annotated method with @Transactional?
• When does the JDBC template acquire (and release) a connection, for every method called or once per template? Why?
• What does @Transactional do? What is the PlatformTransactionManager?
• Where can the @Transactional annotation be used? What is a typical usage if you put it at class level?
• How do you configure a DataSource in Spring?
• What is a callback? What are the JdbcTemplate callback interfaces that can be used with queries? What is each used for? (You would not have to remember the interface names in the exam, but you should know what they do if you see them in a code sample).
• What happens if one @Transactional annotated method is calling another @Transactional annotated method inside a same object instance?
• What does declarative transaction management mean?
• Can you execute a plain SQL statement with the JDBC template?
• Is the JDBC template able to participate in an existing transaction?
• Which PlatformTransactionManager(s) can you use with JPA?
• What is @EnableTransactionManagement for?
• Are you able to participate in a given transaction in Spring while working with JPA?
• What do you have to configure to use JPA with Spring? How does Spring Boot make this easier?
• What is the difference between checked and unchecked exceptions? - Why does Spring prefer unchecked exceptions? - What is the Spring data access exception hierarchy?
• Is a transaction a cross cutting concern? How is it implemented by Spring?
• What is the Template design pattern and what is the JDBC template?
• What is the default rollback policy? How can you override it?
• How does the JdbcTemplate support queries? How does it return objects and lists/maps of objects?
• How are you going to define a transaction in Spring?
• How does transaction propagation work?