Spring Framework MCQ: Spring Framework Multiple Choice Questions

Spring Framework MCQ with answers and explanations for placement tests and job interviews. These solved Spring Framework MCQs are useful for the campus placement for all freshers including Engineering Students, MCA students, Computer and IT Engineers, etc.

Our Spring Framework MCQ (Spring Framework Multiple Choice Questions and answers ) focuses on various parts of the Spring Framework and its concept. It will be useful for anyone learning Spring Framework Basics, Essentials, and/or Fundamentals. We will regularly update the quiz and most interesting thing is that questions come in a random sequence. So every time you will feel new questions.

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Spring Framework MCQ

Spring Framework MCQ: Spring Framework Multiple Choice Questions and Answers

1 / 40

What is a RESTful web service?

Reactive Enterprise Status Transfer is a web service comprising a set of guidelines and technical constraints for web services that monitor and alert of a set of mission-critical resources.

Representational State Transfer an architectural style for creating web services that includes client-server architecture, statelessness, cacheability, a layered system, and a uniform interface.

Redundant Enumerated State Transfer is a web service that provides redundancy in the case of failure and outlines technical constraints for web services that have access to resources.

Reactive Enterprise State Transfer is a web service comprising a set of guidelines and technical constraints for web services y that have access to resources and are async in nature.

2 / 40

What does a ViewResolver do?

It supports internationalization of web applications by detecting a user's locale.

It generates a view by mapping a logical view name returned by a controller method to a view technology.

It creates a unique view determined by the uers's browser type,supporting cross-browser compatibility.

It maps custom parameters to SQL views in the database, allowing for dynamic content to be created in the response.

3 / 40

Which are valid steps to take to enable JPA in Spring Boot?

Add an @EnableJpaRepositories annotation to your configuration class and create a Spring Data Repository.

Add an @EnableJpaEntities annotation to your configuration class, create a Spring Data YAML configuration file, and manually update the Spring XML config files to define your repository locations

Add an @EnableDbFunctionality annotation to your configuration class, create a Spring Data XML configuration file, and manually update the Spring factories file to define your repositories.

Add an @InitJpaEntities annotation to your configuration class, create a Spring Data properties configuration file, and manually update the Spring startup parameters to define your repository locations.

4 / 40

Consider the properties file application.properties. How would you load the property my.property?

my.property=Test

1.

@Prop("${my.property}")
private String val;

2.

@GetVal("my.property")
private String val;

3.

@GetProperty("${my.property}")
private String val;

4.

@Value("${my.property}")
private String val;

5 / 40

How filters are used in Spring Web?

Filters are called before a request hits the DispatcherServlet.They allow for interception-style, chained processing of web requests for security, timeouts, and other purposes.

Filters are used with a checksum algorithm that will filter invalid bytes out of a byte stream request body and allow for processing of HTTP requests from the DispatcherRequestServlet.

Filters are used with a checksum algorithm that will filter invalid bytes out of an octet stream a multipart upload and allow for chained processing of WebDispatcherServlet requests.

Filters are used to validate request parameters out of the byte stream request body and allow for processing of requests from the DispatcherRequestServlet.

6 / 40

How does Spring generate bean names for classes annotated with @Component that do not specify a name?

It uses the short name of the class with the first letter in lowercase.

It uses the short name of the class.

It uses the short name of the class in uppercase.

It uses the canonical name of the class in lowercase.

7 / 40

Which is a valid example of the output from this code (ignoring logging statements) ?

@SpringBootApplication
public class App {
     public static void main(String args[]) {
          SpringApplication.run(App.class, args);
          System.out.println("startup");
     }
}

public class Print implements InitializingBean {
     @Override
     public void afterPropertiesSet() throws Exception {
          System.out.println("init");
     }
}

Nothing will print

startup init

init

startup

8 / 40

What is the delegating filter proxy?

It's the servlet filter chain proxy that handles all requests to the route defined in spring.security.xml. All calls to the filter proxy are forwarded to the ErrorDispatcherServlet.

It's the servlet filter chain that handles requests to the route defined in spring.security.factories. All calls to the filter proxy y are forwarded to the ErrorServlet.

It's the servlet filter proxy delegating to a filter bean specified in web.xml. All calls to the filter proxy will be delegated to that servlet filter bean.

It's the web servlet daemon filter proxy that delegates to a bean specified in spring.security.factories. All calls to the filter proxy that do not contain a proper route will return an error.

9 / 40

How does Spring Data facilitate queries against a datastore?

Queries are explicitly coded in repository implementations using the Spring Data CriteriaBuilder.

Query metadata is stored in the underlying datastore and retrieved at runtime per repository.

Queries are derived from the signatures of methods on a Spring Data repository that contain keywords in their name for constructing the query logic.

A spring-data-queries.xml file contains queries within entity tags that specify the query logic for each repository.

10 / 40

What happens when a class is annotated with the @Controller annotation?

A controller bean definition is defined in the servlet's WebApplicationContext. The class is marked as a web component, and you can map requests to controller methods.

A controller bean definition is defined in the Web Context, and Web Servlet is marked as a component that reads mapped controller requests from an XML config file.

A controller bean definition is defined in the Tomcat Context, and the Controller Servlet is marked as a web component that reads mapped controller requests from a YAML config file.

A controller bean definition is defined in the Servlet Context, and the Controller Servlet is marked as a component that reads mapped controller requests from an XML config file.

11 / 40

Which of these is not a valid method on the JoinPoint interface?

getArgs()

getExceptions()

getSignature()

getTarget()

12 / 40

What is the function of the @Transactional annotation at the class level?

It's a transaction attribute configured by spring.security.transactions.xml config file that uses Spring's transaction implementation and validation code.

It's a transaction must actively validate by the bytecode of a transaction using Spring's TransactionBytecodeValidator class. Default Transaction behavior rolls back on validation exception but commits on proper validation

It creates a proxy that implements the same interface(s) as the annotated class, allowing Spring to inject behaviors before, after, or around method calls into the object being proxied.

t's a transaction that must be actively validated by Spring's TransactionValidator class using Spring's transaction validation code. Default Transaction behavior rolls back on validation exception.

13 / 40

Which annotation can be used within Spring Security to apply method level security?

@Secured

@RequiresRole

@RestrictedTo

@SecurePath

14 / 40

What is the purpose of the @Lazy annotation and why would you use it?

It prevents a bean from being created and injected until you run a specific CLI command. It reduces complexity in the application.

It can be applied to a bean so that the bean is not persisted in the database. It reduces the number of database operations.

It can be applied to a bean so that the bean is not created and injected until it is needed. It can help speed up startup time for your application.

It prevents a bean from being created and injected until it receives a HTTP request to a callback hook. It reduces disk footprint.

15 / 40

What is the root interface for accessing a Spring bean container?

SpringInitContainer

ResourceLoader

ApplicationEventPublisher

BeanFactory

16 / 40

How is a resource defined in the context of a REST service?

A resource is the actual String literal that composes a URI that is accessed on a RESTful web service.

It is an abstract concept that represents a typed object, data, relationships, and a set of methods that operate on it that is accessed via a URI.

A REST service has a pool of resources composed of allocations of memory that allow a request to be processed.

A resource for a REST service is an explicit allocation of a thread or CPU cycles to allow a request to be processed.

17 / 40

The process of linking aspects with other objects to create an advised object is called

dynamic chaining

banding

weaving

interleaving

18 / 40

What is SpEL and how is it used in Spring?

SpEL(Spring Expression Language) runs in the JVM and can act as a drop-in replacement for Groovy or other languages.

SpEL(Spring Expression Language) supports boolean and relational operators and regular expressions, and is used for querying a graph of objects at runtime.

SpEL(Spring Expression Language) allows you to build, configure,and execute tasks such as building artifacts and downloading object dependencies.

SpEL(Spring Expression Language) natively transpiles one JVM language to another, allowing for greater flexibility.

19 / 40

How are mocking frameworks such as Mockito used with Spring?

Mockito will spin up a mock web service hosted in a Docker container that can respond to HTTP requests to mock out third-party APIs.

Mockito can use annotations or factory methods to create mock objects that may be injected into tests in place of dependencies. The behavior of mocks can be explicitly configured.

Mockito will create mock users to repeatedly perform requests against your Spring application to test your app's ability to take load.

Mockito will spin up a mock web service hosted in a Docker container that can respond to RPC calls to mock out remote resources.

20 / 40

What does @SpringBootApplication do?

his annotation takes the String literal passed into the annotation as a parameter and automatically generates all the code for your application as per the passed in template parameter.

This compound annotation applies the @Bootable, @Springify, and @StandardConfig annotations that launch a CLI tool after launching the Spring Boot WAR file that will guide you through a series of prompts to set up your app.

This annotation scans the provided spring-boot-config-construction.yaml file in your root directory and automatically generates all the code for your application as defined in the YAML file.

21 / 40

How are Spring Data repositories implemented by Spring at runtime?

Spring automatically generated code for you based on your YAML config that defined a MethodInterceptor chain that intercept calls to the instance and computed SQL on the fly.

A JDK proxy instance is created, which backs the repository interface, and a MethodInterceptor intercepts calls to the instance and routes as required.

The Spring JDK proxy creates a separate runtime process that acts as an intermediary between the database and the Web server, and intercepts calls to the instance and handles requests.

Spring automatically generated code for you based on your XML config files that define a SpringMethodAutoGeneration factory that intercepts calls to the instance and creates dynamic method that computer SQL on the fly.

22 / 40

What value does Spring Boot Actuator provide?

It helps monitor and manage a Spring Boot application by providing endpoints such as health checks, auditing, metrics gathering, and HTTP tracing.

It provides out-of-the-box functionality that integrates with third-party metrics platforms to automatically scale up and down the number of threads in threadpools.

It's a CLI that allows you to modify the configuration of a running Spring Boot application without the need for restarting or downtime.

It provides out-of-the-box functionality that integrates wiltr?third-party metrics platforms to automatically scale up and down the number of instances of the Spring Boot application

23 / 40

What is the purpose of the @RequestBody annotation?

to create a ThreadLocal byte stream that allows a request to be encoded for reading directly into a database

to automatically generate a ThreadLocal byte stream from the body of a request that allows a request to scanned for security risks

to indicate whether an annotated handler method parameter should be bound to the web request body, which is converted by an HttpMessageConverter

to automatically validate the characters contained in a request to ensure that they are a valid character encoding

24 / 40

What is component scanning?

feature that scans packages for classes with specific annotations and, when found, creates their bean definitions within the IoC container

paradigm where bytecode is actively scanned to identify additional optimizations to inject into components in the application context

a method by which cloud repositories are scanned to identify components for injection into an IoC container

a method by which binary data in a database is searched to identify components for injection into the IoC container

25 / 40

What is the purpose of the @ContextConfiguration annotation in a JUnit Test?

It introspects the local machine and automatically provisions resources based on certain contextual configuration files.

It automatically generates comments for annotated classes on autowired dependencies to provide additional context about dependencies.

It defines metadata at the class-level to determine how to load or configure an ApplicationContext in Spring integration tests.

It automatically generates JavaDocs for annotated classes to provide additional context about the purpose of the class.

26 / 40

What is the purpose of the Spring IoC (Inversion of Control) container?

It instantiates and configures objects, supplied at runtime, to classes that define them as a dependency.

It allows the front-end code to manage the ResponseBody objects provided by a back-end REST API.

It allows a database to define business objects via a shared schema at compile time.

It facilitates a remote server to configure a local application.

27 / 40

What is a transaction in the context of Spring Data?

a version-controlled schema change that is applied to a database

a sequence of actions representing a single unit of work managed as a single operation that can be either committed or rolled back

an encoded message and response between various shards of a database

an exchange or interaction between various worker nodes in a multithreaded environment

28 / 40

In what order do the @PostConstruct annotated method, the init-method parameter method on beans and the afterPropertiesSet() method execute?

1. afterPropertiesSet() 2. init-method 3. @PostConstruct

1. @PostConstruct 2. afterPropertiesSet() 3. init-method

1. init-method 2. afterPropertiesSet() 3. @PostConstruct

ou cannot use these methods together-you must choose only one.

29 / 40

Which println statement would you remove to stop this code throwing a null pointer exception?

@Component
public class Test implements InitializingBean {
     @Autowired
     ApplicationContext context;
     @Autowired
     static SimpleDateFormt formatter;

     @Override
     public void afterPropertiesSet() throws Exception {
          System.out.println(context.containsBean("formatter") + " ");
          System.out.println(context.getBean("formatter").getClass());
          System.out.println(formatter.getClass());
          System.out.println(context.getClass());
     }
}

@Configuration
class TestConfig {
     @Bean
     public SimpleDateFormat formatter() {
          return new SimpleDateFormat();
     }
}

formatter.getClass()

context.getClass()

context.getBean("formatter").getClass()

context.containsBean("formatter")

30 / 40

What is the name of the central servlet that dispatches requests to controllers?

DispatchingDelegatorServlet

DispatcherServlet

Router

FrontControllerServlet

31 / 40

Which property can be used to change the port of a Spring application?

Port

spring.port

spring.settings.port

server.port

32 / 40

What is Spring Boot autoconfiguration?

It triggers a local automated review of configuration files such as web.xml and detects possible security issues or automatically resolves circular dependencies.

It triggers an automated review of configuration by a web-based agent that reviews your existing web.xml file and detects possible security issues.

It's an opinionated, intelligent method of introspecting an app to configure beans that are likely to be needed. This configuration can be overridden over time with manual configuration.

It provides plug-in functionality while editing your web.xml and other config files that will autocomplete common dependencies while typing.

33 / 40

How do you inject a dependency into a Spring bean?

any of these answers

Annotate a Setter method with the @Autowired annotation.

Specify parameters in the constructor with an optional @Autowired annotation.

Use field injection.

34 / 40

What is the DispatcherServlet and what is its function?

The DispatcherServlet process daemon assigns a separate Web Servlet Container process to each HTTP request that comes into the web server.

It is a servlet that dispatches HTTP requests to registered handlers/controllers for processing.

The DispatcherServlet API assigns a separate Web Servlet Node process to each additional HTTP request that comes into the web server.

It is a servlet that dispatches an array of background daemon processes that allocate memory and CPU cycles to each request.

35 / 40

What is dependency injection?

a method by which objects define dependencies they need as abstractions that allows the framework to instantiate and configure them in a central location at runtime.

a paradigm where dependent code is injected into the bytecode of a Java application on a remote server.

a way of injecting remote dependencies into a pre-packaged JAR file from the file system.

a way of injecting remote dependencies into a pre-packaged WAR file from the file system.

36 / 40

How are JDK Dynamic proxies and CGLIB proxies used in Spring?

JDK Dynamic proxy can proxy only interface, so it is used if the target implements at least one interface. A CGLIB proxy can create a proxy by subclassing and is used if the target does not implement an interface.

Only JDK Dynamic proxies are used in the Spring Bean Lifecycle. CGLIB proxies are used only for integrating with other frameworks.

Only CGLIB proxies are used in the Spring Bean Lifecycle. JDK Dynamic proxies are used only for integrating with other frameworks.

JDK Dynamic proxy can only using an abstract class extended by a target. A CGLIB proxy can create a proxy through bytecode interweaving and is used if the target does not extend an abstract class.

37 / 40

Modularization of a concern that cuts across multiple classes is known as a(n)___.

multiclass

aspect

crosscut

sidecut

38 / 40

Which of these is a valid Advice annotation?

@AfterError

@AfterReturning

@AfterException

@AfterExecution

39 / 40

What is the purpose of the @ResponseBody annotation?

to validate the char array contained in a response to ensure that it is a valid character encoding

to generate a local byte stream from the body of a response that allows a request to be scanned for security risks

to indicate whether a handler method return value should be bound to the web response body in servlet environments

to ensure a ThreadLocal byte stream that allows a response to be encoded for reading directly into a socket stream

40 / 40

What is the result of calling the map controller method using the HTTP request GET localhost:8080/map?foo=foo&bar=bar ?

@RestController
public class SampleController {

     @RequestMapping("/map")
     public String map(@RequestParam("bar") String foo, @RequestParam("foo") String bar) {
          return bar + foo;
     }
}

An InvalidParameterNameMappingException is thrown at runtime.

barfoo

foobar

A status code of 400 Bad Request is returned.

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Spring Framework MCQ: Spring Framework Multiple Choice Questions

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