Configuration precedence order in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the highest precedence configuration source in Spring Boot.

Spring Boot

spring.config.location=[1]

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Aenvironment variables

Bapplication.yml

Cclasspath:/application.properties

Dcommand-line arguments

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing environment variables instead of command-line arguments

Confusing classpath properties with runtime overrides

Command-line arguments have the highest precedence in Spring Boot configuration order.

2fill in blank

medium

Complete the code to indicate the default configuration file Spring Boot loads from the classpath.

Spring Boot

spring.config.name=[1]

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Aapplication.properties

Bapplication

Capplication.yml

Dconfig

Attempts:

3 left

💡 Hint

Common Mistakes

Including the file extension in the config name

Using 'config' instead of 'application'

Spring Boot loads configuration from a file named 'application' with supported extensions like .properties or .yml by default.

3fill in blank

hard

Fix the error in the code to correctly specify a profile-specific configuration file in Spring Boot.

Spring Boot

spring.config.location=classpath:/application-[1].properties

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Adev

Bdefault

Cactive

Dprofile

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'profile' or 'active' literally instead of the profile name

Using 'default' which is not a profile

The profile name 'dev' is commonly used to load development-specific configuration files like application-dev.properties.

4fill in blank

hard

Fill both blanks to complete the code that sets the order of configuration precedence: first environment variables, then {{BLANK_1}}.

Spring Boot

spring.config.import=optional:configtree:./config/,{{BLANK_2}}

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Aapplication.properties

Bcommand-line arguments

Cclasspath:/application.properties

Denvironment variables

Attempts:

3 left

💡 Hint

Common Mistakes

Reversing the order of command-line arguments and classpath properties

Confusing environment variables with configtree

After environment variables, Spring Boot loads from classpath application.properties, then command-line arguments override all.

5fill in blank

hard

Fill all three blanks to complete the code that defines a configuration property with a default value, overridden by {{BLANK_1}}, then {{BLANK_2}}, and finally {{BLANK_3}}.

Spring Boot

spring.config.override=[1],[2],[3]

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

Aapplication.properties

Benvironment variables

Ccommand-line arguments

Dprofile-specific properties

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of environment variables and command-line arguments

Including profile-specific properties in the wrong position

The order is default application.properties, then environment variables, and finally command-line arguments which have the highest precedence.