Log formatting configuration in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the log pattern to include timestamp and log level.

Spring Boot

logging.pattern.console=[1]

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

A%logger{36} - %msg%n

B%msg%n

C%d{yyyy-MM-dd HH:mm:ss} %-5level - %msg%n

D%thread %msg%n

Attempts:

3 left

💡 Hint

Common Mistakes

Using only %msg%n without timestamp or level

Forgetting to include the newline %n at the end

The pattern %d{yyyy-MM-dd HH:mm:ss} %-5level - %msg%n includes the timestamp and log level in the log output.

2fill in blank

medium

Complete the code to configure the log pattern to show thread name and logger name.

Spring Boot

logging.pattern.console=[1]

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

A%level %msg%n

B%thread %logger - %msg%n

C%msg%n

D%d{HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the thread name

Not limiting logger name length with {36}

The pattern %d{HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n shows time, thread, level, logger name, and message.

3fill in blank

hard

Fix the error in the log pattern to correctly display the log level padded to 5 characters.

Spring Boot

logging.pattern.console=%d{HH:mm:ss} [1] - %msg%n

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

A%-5level

B%level

C%5level

D%lev

Attempts:

3 left

💡 Hint

Common Mistakes

Using %level without padding

Using %lev which is invalid

The correct syntax to pad the log level to 5 characters is %-5level.

4fill in blank

hard

Fill the blanks to create a log pattern that shows date, thread, log level, and message.

Spring Boot

logging.pattern.console=[1] [2] [3] - %msg%n

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

A%d{yyyy-MM-dd HH:mm:ss}

B%thread

C%-5level

D%logger

Attempts:

3 left

💡 Hint

Common Mistakes

Putting log level before date

Omitting thread name

The pattern starts with date %d{yyyy-MM-dd HH:mm:ss} and thread name %thread, followed by level and message.

5fill in blank

hard

Fill all three blanks to create a log pattern with logger name, log level, and message.

Spring Boot

logging.pattern.console=%d{HH:mm:ss} [[1]] [2] - [3]%n

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

A%logger{36}.toUpperCase()

B%-5level

C%msg

D%logger{36}

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to use Java methods like toUpperCase() in pattern

Omitting the message placeholder

The correct pattern uses %logger{36} for logger name, %-5level for padded log level, and %msg for the message.

Note: Spring Boot's default pattern does not support toUpperCase() directly.