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.

Questions and Answers

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

A - It supports multiple output appenders per logger.

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 Appender object?

A - This is a lower-level layer of log4j architecture which provides Appender objects.

B - The Appender object is responsible for publishing logging information to various preferred destinations such as a database, file, console, UNIX Syslog, etc.

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 level designates error events that might still allow the application to continue running?

Answer : B

Explanation

ERROR − Designates error events that might still allow the application to continue running.

Q 4 - Which of the following level designates potentially harmful situations?

Answer : C

Explanation

WARN − Designates potentially harmful situations.

Q 5 - What is the purpose of t 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 : D

Explanation

t − Used to output the name of the thread that generated 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 - What is the purpose of Filename configuration of FileAppender?

A - output stream to the file being flushed with each append operation.

B - to set the platform-specific encoding scheme.

C - to set the threshold level for this appender.

D - to set the name of the log file.

Answer : D

Explanation

Filename − The name of the log file.

Q 8 - What is the purpose of maxBackupIndex configuration of RollingFileAppender?

A - to set the critical size of the file above which the file will be rolled.

B - to set the number of backup files to be created.

C - Both of the above.

D - None of the above.

Answer : B

Explanation

maxBackupIndex − This property denotes the number of backup files to be created.

Q 9 - Is log4j thread safe?

Answer : A

Explanation

true − log4j is thread-safe.

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

Answer : A

Explanation

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

log4j_questions_answers.htm

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