log4j Online Quiz

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

A - It is designed to handle Java Exceptions from the start.

B - It uses multiple levels, namely ALL, TRACE, DEBUG, INFO, WARN, ERROR and FATAL.

C - The format of the log output can be easily changed by extending the Layout class.

D - All of the above.

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

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

B - It provides support to appender objects before publishing logging information.

C - Layout objects play an important role in publishing logging information in a way that is human-readable and reusable.

D - All of the above.

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)

Q 4 - Which of the following is true about log4j levels?

A - A log request of level p in a logger with level q is enabled if p >= q.

B - A log request assumes that levels are ordered.

C - For the standard levels, we have ALL < DEBUG < INFO < WARN < ERROR < FATAL < OFF.

D - All of the above.

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.

Q 6 - Which of the following is correct about org.apache.log4j.HTMLLayout class?

A - If you want to generate your logging information in an HTML-formatted file, then you can use org.apache.log4j.HTMLLayout to format your logging information.

B - The HTMLLayout class extends the abstract org.apache.log4j.Layout class and overrides the format() method from its base class to provide HTML-style formatting.

C - Both of the above.

D - None of the above.

Q 7 - What is the purpose of fileAppend configuration of FileAppender?

A - logging information to be appended to the end of the same file.

B - to set the buffered writing.

C - to set the buffer size

D - None of the above.

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.

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.

Q 10 - Logger uses the Layout objects and the conversion pattern associated with them to format the logging information.

A - true

B - false