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 - It is thread-safe.

B - It is optimized for speed.

C - It is based on a named logger hierarchy.

D - All of the above.

Answer : D

Explanation

All of the above options are correct.

Q 2 - Which of the following is correct about ObjectRenderer object?

A - The ObjectRenderer object is specialized in providing a String representation of different objects passed to the logging framework.

B - This object is used by Layout objects to prepare the final logging information.

C - Both of the above.

D - None of the above.

Answer : C

Explanation

Both of the above options are correct.

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

A - public void warn(Object message)

B - public void trace(Object message)

C - public void fatal(Object message)

D - public void info(Object message)

Answer : B

Explanation

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

Q 4 - Which of the following level designates finer-grained informational events than the DEBUG?

Answer : B

Explanation

TRACE − Designates finer-grained informational events than the DEBUG.

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

A - Used to output location information of the caller which generated the logging event.

B - Used to output the line number from where the logging request was issued.

C - Used to output the application supplied message associated with the logging event.

D - Used to output the method name where the logging request was issued.

Answer : C

Explanation

m − Used to output the application supplied message associated with the logging event.

Q 6 - What is the intent of %.20c format modifier?

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

B - Right pad with spaces if the category name is less than 20 characters long.

C - Truncate from the beginning if the category name is longer than 20 characters.

D - None of the above.

Answer : C

Explanation

%.20c − Truncate from the beginning if the category name is longer than 20 characters.

Q 7 - Which of the following set the location information for the logging event using HTMLLayout?

A - HTMLLayout.setContentType(String)

B - HTMLLayout.setLocationInfo(String)

C - HTMLLayout.setTitle(String)

D - None of the above.

Answer : B

Explanation

HTMLLayout.setLocationInfo(String) − Sets the location information for the logging event. Default is false.

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

A - '.' yyyy-MM

B - '.' yyyy-MM-dd

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

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

Answer : C

Explanation

'.' yyyy-MM-dd-a − Roll over at midday and midnight of each day.

Q 9 - The layout layer of log4j architecture provides objects which are used to format logging information in different styles.

A - false

B - true

Answer : B

Explanation

true − The layout layer of log4j architecture provides objects which are used to format logging information in different styles. It provides support to appender objects before publishing logging information.

Q 10 - The target may be a console, a file, or another item depending on the appender.

A - true

B - false

Answer : A

Explanation

true − The target may be a console, a file, or another item depending on the appender.

log4j_questions_answers.htm