application.properties structure in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the server port to 8080 in application.properties.

Spring Boot

server.[1]=8080

Drag options to blanks, or click blank then click option'

Aport

Bhost

Caddress

Durl

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'host' instead of 'port' will not set the port number.

Using 'address' or 'url' are incorrect keys for port configuration.

The property server.port sets the port number where the Spring Boot application listens.

2fill in blank

medium

Complete the code to set the Spring datasource URL in application.properties.

Spring Boot

spring.datasource.[1]=jdbc:mysql://localhost:3306/mydb

Drag options to blanks, or click blank then click option'

Adriver-class-name

Bpassword

Cusername

Durl

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'username' or 'password' instead of 'url' will not set the connection string.

Using 'driver-class-name' is for specifying the driver, not the URL.

The property spring.datasource.url defines the database connection URL.

3fill in blank

hard

Fix the error in the property key to set the logging level for Spring framework.

Spring Boot

logging.level.[1]=DEBUG

Drag options to blanks, or click blank then click option'

Aspring-framework

Bspring_framework

Corg.springframework

DspringFramework

Attempts:

3 left

💡 Hint

Common Mistakes

Using hyphens or underscores breaks the property key format.

Capital letters are not used in property keys.

The correct property key uses dot notation without hyphens or underscores: logging.level.org.springframework.

4fill in blank

hard

Fill both blanks to configure the Thymeleaf template prefix and suffix in application.properties.

Spring Boot

spring.thymeleaf.[1]=classpath:/templates/
spring.thymeleaf.[2]=.html

Drag options to blanks, or click blank then click option'

Aprefix

Bsuffix

Cpath

Dextension

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'path' or 'extension' are not valid property keys for Thymeleaf configuration.

Mixing prefix and suffix values will cause template loading errors.

The properties spring.thymeleaf.prefix and spring.thymeleaf.suffix define where templates are located and their file extension.

5fill in blank

hard

Fill all three blanks to configure a custom error page path and enable detailed error messages.

Spring Boot

server.error.[1]=/error
server.error.[2]=true
server.error.[3]=true

Drag options to blanks, or click blank then click option'

Apath

Binclude-message

Cinclude-stacktrace

Denabled

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'enabled' instead of 'include-message' or 'include-stacktrace' will not work.

Not setting the error path will use the default error page.

The properties server.error.path, server.error.include-message, and server.error.include-stacktrace configure the error page path and what details to show.