Web services with Spring Boot

Question 1

What is a web service in the context of Java development?

a) A method with a graphical user interface (GUI)
b) A method exposed to and run on the web without a GUI
c) A standalone desktop application
d) A database management system

Answer 1

b) A method exposed to and run on the web without a GUI

Question 2

What is Spring Boot primarily used for?

a) Building desktop applications
b) Quickly building and deploying standalone Java web applications
c) Managing databases
d) Creating graphical user interfaces

Answer 2

b) Quickly building and deploying standalone Java web applications

Question 3

What is the purpose of the Spring Initializr?

a) To manage database connections
b) To quickly build and configure starting project files for Spring Boot
c) To create graphical user interfaces
d) To debug Java applications

Answer 3

b) To quickly build and configure starting project files for Spring Boot

Question 4

Which of the following is NOT a dependency added in the Spring Initializr for the weather application?

a) Spring Web
b) Vaadin
c) Spring Data for Apache Cassandra
d) Spring Security

Answer 4

d) Spring Security

Question 5

What is the purpose of the pom.xml file in a Maven project?

a) To define the graphical user interface
b) To manage project dependencies and configurations
c) To store database credentials
d) To define RESTful endpoints

Answer 5

b) To manage project dependencies and configurations

Question 6

What does the MVC design pattern stand for?

a) Model, View, Controller
b) Main, View, Controller
c) Model, View, Configuration
d) Main, View, Configuration

Answer 6

a) Model

Question 7

What is the role of the Controller in the MVC pattern?

a) To handle the structure of the data
b) To manage the user interface
c) To abstract the model from the view and handle data requests
d) To store data in the database

Answer 7

c) To abstract the model from the view and handle data requests

Question 8

What annotation is used to define a class as a RESTful controller in Spring Boot?

a) @Controller
b) @RestController
c) @RequestMapping
d) @GetMapping

Answer 8

b) @RestController

Question 9

What annotation is used to specify the base service name for a RESTful controller in Spring Boot?

a) @Controller
b) @RestController
c) @RequestMapping
d) @GetMapping

Answer 9

c) @RequestMapping

Question 10

What HTTP method is used to retrieve data in a RESTful service?

a) POST
b) PUT
c) GET
d) DELETE

Answer 10

c) GET

Question 11

What is the purpose of the @GetMapping annotation in Spring Boot?

a) To define a POST endpoint
b) To define a GET endpoint
c) To define a PUT endpoint
d) To define a DELETE endpoint

Answer 11

b) To define a GET endpoint

Question 12

What is the default port used by the embedded Tomcat server in Spring Boot?

a) 8080
b) 80
c) 443
d) 3000

Answer 12

a) 8080

Question 13

What is the purpose of the ResponseEntity class in Spring Boot?

a) To define the structure of the data
b) To manage the user interface
c) To represent the entire HTTP response, including status code and body
d) To store data in the database

Answer 13

c) To represent the entire HTTP response

Question 14

What HTTP response code is returned by the ResponseEntity.ok() method?

a) 200
b) 404
c) 500
d) 403

Answer 14

a) 200

Question 15

What is the purpose of the curl command in the context of testing RESTful services?

a) To create a new web service
b) To make HTTP requests from the command line
c) To manage database connections
d) To debug Java applications

Answer 15

b) To make HTTP requests from the command line

Question 16

What is the correct curl command to test the helloworld endpoint of the weather application?

a) curl -X POST http://127.0.0.1:8080/weather/helloworld
b) curl -X GET http://127.0.0.1:8080/weather/helloworld
c) curl -X PUT http://127.0.0.1:8080/weather/helloworld
d) curl -X DELETE http://127.0.0.1:8080/weather/helloworld

Answer 16

b) curl -X GET http://127.0.0.1:8080/weather/helloworld

Question 17

What is the purpose of the @RestController annotation in Spring Boot?

a) To define a class as a RESTful controller
b) To define a GET endpoint
c) To define a POST endpoint
d) To define a PUT endpoint

Answer 17

a) To define a class as a RESTful controller

Question 18

What is the purpose of the @RequestMapping annotation in Spring Boot?

a) To define a class as a RESTful controller
b) To specify the base service name for a RESTful controller
c) To define a GET endpoint
d) To define a POST endpoint

Answer 18

b) To specify the base service name for a RESTful controller

Question 19

What is the purpose of the @GetMapping annotation in Spring Boot?

a) To define a class as a RESTful controller
b) To specify the base service name for a RESTful controller
c) To define a GET endpoint
d) To define a POST endpoint

Answer 19

c) To define a GET endpoint

Question 20

What is the purpose of the ResponseEntity.ok() method in Spring Boot?

a) To return an HTTP response with a 200 status code
b) To return an HTTP response with a 404 status code
c) To return an HTTP response with a 500 status code
d) To return an HTTP response with a 403 status code

Answer 20

a) To return an HTTP response with a 200 status code