log4j Online Quiz

Following quiz provides Multiple Choice Questions (MCQs) related to log4j Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Q 1 - Which of the following is correct about log4j?

A - The target of the log output as well as the writing strategy can be altered by implementations of the Appender interface.

B - It is fail-stop.

C - log4j does not guarantee that each log statement will be delivered to its destination.

D - All of the above.

Answer : D

Explanation

All of the above options are correct.

Q 2 - Which of the following is correct about layout object in Appender?

A - Appender uses the Layout objects and the conversion pattern associated with them to format the logging information.

B - The Layout objects may be a console, a file, or another item depending on the appender.

C - The Layout objects is required to control the filtration of the log messages.

D - Appender can have a Layout objects associated with it independent of the logger level.

Answer : A

Explanation

layout − Appender uses the Layout objects and the conversion pattern associated with them to format the logging information.

Q 3 - Which of the following method of logger print a log message in warn mode?

A - public void warn(Object message)

B - public void error(Object message)

C - public void fatal(Object message)

D - public void info(Object message)

Answer : A

Explanation

public void warn(Object message) of Logger class prints messages with the level Level.WARN.

Q 4 - Which of the following level designates informational messages that highlight the progress of the application at coarse-grained level?

Answer : D

Explanation

INFO − Designates informational messages that highlight the progress of the application at coarse-grained level.

Q 5 - What is the purpose of p character used in the conversionPattern of PatternLayout object?

A - Outputs the platform dependent line separator character or characters.

B - Used to output the priority of the logging event.

C - Used to output the number of milliseconds elapsed from the construction of the layout until the creation of the logging event.

D - Used to output the name of the thread that generated the logging event.

Answer : B

Explanation

p − Used to output the priority of the logging event.

Q 6 - What is the purpose of % character used in the conversionPattern of PatternLayout object?

A - Used to output the NDC (nested diagnostic context) associated with the thread that generated the logging event.

B - Used to print the information stored in the MDC against the key.

C - Used to print a % sign.

D - Used to Left pad with spaces if the category name is less than 20 characters long.

Answer : C

Explanation

% − The literal percent sign. %% will print a % sign.

Q 7 - Which of the following set title for the HTML file using HTMLLayout?

A - HTMLLayout.setContentType(String)

B - HTMLLayout.setLocationInfo(String)

C - HTMLLayout.setTitle(String)

D - None of the above.

Answer : C

Explanation

HTMLLayout.setTitle(String) − Sets the title for the HTML file. Default is log4j Log Messages.

Q 8 - Which of the following DatePattern configuration of DailyRollingFileAppender rolls over the logs at midnight each day?

A - '.' yyyy-MM

B - '.' yyyy-MM-dd

C - '.' yyyy-MM-dd-a

D - '.' yyyy-MM-dd-HH

Answer : B

Explanation

'.' yyyy-MM-dd − Roll over at midnight each day. This is the default value.

Q 9 - What is the purpose of user configuration of JDBCAppender?

A - to set the jdbc URL.

B - to set the database user name.

C - to specify the SQL statement to be executed every time a logging event occurs.

D - None of the above.

Answer : B

Explanation

user − Sets the database user name.

Q 10 - Appender can have a threshold level associated with it independent of the logger level.

A - true

B - false

Answer : A

Explanation

true − Appender can have a threshold level associated with it independent of the logger level. The Appender ignores any logging messages that have a level lower than the threshold level.

log4j_questions_answers.htm