Spring_Essentials_Day_2

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Spring Core, Spring Test, Spring ORM

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Birendra Singh

India

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Spring_Essentials_Day_2


Froggy Jumps Spring_Essentials_Day_2Version en ligne Spring Core, Spring Test, Spring ORM par Birendra Singh 1 @Named class Debit implements Payment { String pay() { return "Debit" } } @Named class Credit implements Payment { String pay() {return "Credit"; } } @Named class Customer { @Autowired @Qualifier("creditCard") private Payment payment;} a Debit b Credit c NoUniqueBeanDefinitionException 2 @Configuration public class AppConfig { @Bean @Profile("dev") public DataSource devDB() { return new HikariDataSource(); } @Bean @Profile("prod") public DataSource prodDB() {return new DataSource(); } } spring.profiles.active=dev a prodDB only b devDB only c None 3 What happens if no active profile is specified? a All beans load b Only default profile beans load c Spring throws exception 4 @Component("emp") class Employee { public String getName() { return "Raj";} } @Component class TestBean { @Value("#{emp.name}") private String name; public void show() {System.out.println(name); } }What is the output? a emp b null c Raj 5 Which expression accesses bean property? a ${bean.name} b %{bean.name} c #{bean.name} 6 @Component("calc") class Calculator { public int square(int n) { return nn; } } @Value("#{calc.square(5)}") private int result; What is the output of the program? a 25 b 10 c 5 7 @Component class Demo { @Value("#{{'Java','Spring','Hibernate'}}") private List courses; public void print() { System.out.println(courses.size()); } }What will be the output? a 3 b 1 c 0 8 Why is PropertySourcesPlaceholderConfigurer used? a Load XML schema b Enable ${} placeholder resolution c Enable transactions 9 @Configuration @PropertySource("classpath:db.properties") class Config { @Value("${db.name}") private String db; }If property file contains: db.name=mysql a mysql b db.name c null 10 Which annotation loads properties file? a @Import b @ComponentScan c @PropertySource 11 Correct lifecycle order? a Constructor → destroy → init b Constructor → dependency injection → init → destroy c BeanPostProcessor → constructor 12 Which interface provides initialization callback? a DisposableBean b InitializingBean c ApplicationContextAware 13 Which method is called automatically before bean destruction? a configure() b @PreDestroy c destroy() 14 Which annotation is equivalent to Spring’s @Component? a @Resource b @Named c @Autowired 15 @Resource injects dependency primarily by? a Type b Constructor c Name 16 @Component @Lazy class Demo { public Demo() { System.out.println("Bean Created"); } }What will be the output of the above code? a Bean created only when requested b Compile error c Bean created during container startup 17 Which scope commonly uses lazy loading? a Singleton eager beans b Primitive beans c Prototype heavy beans 18 What is the purpose of @DirtiesContext annotation? a Destroy bean manually b Mark context as corrupted and reload c Create profiles 19 Which mode reloads context after each test method? a BEFORE_CLASS b AFTER_METHOD c AFTER_EACH_TEST_METHOD 20 Which enum belongs to @DirtiesContext? a ScopeMode b LifecycleMode c MethodMode 21 Which exception advantage is provided by Spring ORM? a Exception translation into DataAccessException hierarchy b Runtime compile exception c Servlet exception handling 22 Which is NOT a feature of Spring ORM? a Declarative transaction management b Exception translation c Tight coupling with Hibernate API 23 @Component("mathBean") class MathBean { public int cube(int n) { return nn*n; } } @Component class Demo { @Value("#{mathBean.cube(3)}") int value; public void print()System.out.println(value); } } What will be output? a 3 b 6 c 27 24 @Component("bike") class Bike {} @Component class Rider { @Inject @Named("bike") private Bike bike; }What happens? a Injection successful b Bean ambiguity c NullPointerException 25 @Component @Lazy class Engine { public Engine() { System.out.println("Engine Created"); } }AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(Config.class); System.out.println("Container Started"); a . Engine Created then Container Started b Container Started only c Bean created twice

Spring_Essentials_Day_2

Froggy Jumps

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Froggy Jumps

Spring_Essentials_Day_2Version en ligne

par Birendra Singh

@Named class Debit implements Payment { String pay() { return "Debit" } } @Named class Credit implements Payment { String pay() {return "Credit"; } } @Named class Customer { @Autowired @Qualifier("creditCard") private Payment payment;}

@Configuration public class AppConfig { @Bean @Profile("dev") public DataSource devDB() { return new HikariDataSource(); } @Bean @Profile("prod") public DataSource prodDB() {return new DataSource(); } } spring.profiles.active=dev

What happens if no active profile is specified?

@Component("emp") class Employee { public String getName() { return "Raj";} } @Component class TestBean { @Value("#{emp.name}") private String name; public void show() {System.out.println(name); } }What is the output?

Which expression accesses bean property?

@Component("calc") class Calculator { public int square(int n) { return n*n; } } @Value("#{calc.square(5)}") private int result; What is the output of the program?

@Component class Demo { @Value("#{{'Java','Spring','Hibernate'}}") private List courses; public void print() { System.out.println(courses.size()); } }What will be the output?

Why is PropertySourcesPlaceholderConfigurer used?

@Configuration @PropertySource("classpath:db.properties") class Config { @Value("${db.name}") private String db; }If property file contains: db.name=mysql

Which annotation loads properties file?

Correct lifecycle order?

Which interface provides initialization callback?

Which method is called automatically before bean destruction?

Which annotation is equivalent to Spring’s @Component?

@Resource injects dependency primarily by?

@Component @Lazy class Demo { public Demo() { System.out.println("Bean Created"); } }What will be the output of the above code?

Which scope commonly uses lazy loading?

What is the purpose of @DirtiesContext annotation?

Which mode reloads context after each test method?

Which enum belongs to @DirtiesContext?

Which exception advantage is provided by Spring ORM?

Which is NOT a feature of Spring ORM?

@Component("mathBean") class MathBean { public int cube(int n) { return n*n*n; } } @Component class Demo { @Value("#{mathBean.cube(3)}") int value; public void print()System.out.println(value); } } What will be output?

@Component("bike") class Bike {} @Component class Rider { @Inject @Named("bike") private Bike bike; }What happens?

@Component @Lazy class Engine { public Engine() { System.out.println("Engine Created"); } }AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(Config.class); System.out.println("Container Started");

@Component("mathBean") class MathBean { public int cube(int n) { return nnn; } } @Component class Demo { @Value("#{mathBean.cube(3)}") int value; public void print()System.out.println(value); } } What will be output?