Free VMware 2V0-72.22 Practice Exam with Questions & Answers | Set: 2

B. The classes are eligible for handling requests in Spring MVC.

This is true because the @Controller annotation marks a class as a web request handler, and it is typically used with the @RequestMapping annotation to map specific URLs to methods1. The @Controller annotation also allows the class to be recognized as a Spring-managed component through the classpath scanning2.

E. The @Controller annotation is a stereotype annotation like @Component.

This is true because the @Controller annotation is a specialization of the generic stereotype @Component annotation, which allows a class to be recognized as a Spring-managed component3. The @Controller annotation extends the use-case of @Component and marks the annotated class as a business or presentation layer4.

A. It causes Spring Boot to enable auto-configuration by default.

This is true because the @SpringBootApplication annotation includes the @EnableAutoConfiguration annotation, which enables Spring Boot’s auto-configuration mechanism1. Auto-configuration attempts to automatically configure your Spring application based on the jar dependencies that you have added2.

B. Component scanning will start from the package of the class.

This is true because the @SpringBootApplication annotation includes the @ComponentScan annotation, which enables component scanning on the package where the application is located1. Component scanning allows Spring to automatically detect and register beans annotated with @Component, @Controller, @Service, @Repository, etc3.

A. @EntityScan and spring.jpa.* properties can be used to customize Spring Data JPA.

This is true because the @EntityScan annotation can be used to specify the base packages to scan for JPA entities, instead of using the default package of the main application class. The spring.jpa.* properties can be used to configure various aspects of Spring Data JPA, such as the database platform, the DDL generation, the show-sql flag, etc.

B. Any kind of Hibernate property can be passed to Spring Data JPA like spring.jpa.properties.xxx.

This is true because Spring Data JPA supports passing any Hibernate-specific property by using the prefix spring.jpa.properties. For example, we can use spring.jpa.properties.hibernate.format_sql=true to format the SQL statements generated by Hibernate.

Custom metrics can be measured using Meter primitives such as Counter, Gauge, Timer, and DistributionSummary: Spring Boot Actuator Metrics allows you to define and measure custom metrics using various Meter primitives. These primitives include Counter (counting occurrences), Gauge (providing a current value), Timer (measuring the time taken for a task), and DistributionSummary (collecting and summarizing distribution statistics).

Enable auto-configuration of the Spring Application Context, attempting to guess and configure beans that you are likely to need https://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/autoconfigure/EnableAutoConfiguration.html

Transactions are units of work that ensure data consistency and integrity by enforcing atomicity, consistency, isolation, and durability (ACID) properties. Spring provides an abstraction layer for transaction management that supports various transaction APIs such as JDBC, JPA, Hibernate, etc. To use transactions in Spring, we need to do two things:

Enable transaction management by adding @EnableTransactionManagement annotation to a Java configuration class or tx:annotation-driven/ element to an XML configuration file.

Declare transactional boundaries by annotating a class, an interface, or individual methods with the @Transactional annotation. This annotation indicates that the execution of the annotated element should be wrapped in a transaction.

This is true because Spring's JdbcTemplate class offers a variety of methods to execute SQL queries against a relational database. These include methods for executing SQL queries (query, queryForObject, queryForList, etc.), updates (update), and batch operations (batchUpdate).