log4j Online Quiz

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.

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

A - The LogManager object manages the logging framework.

B - It is responsible for reading the initial configuration parameters from a system-wide configuration file or a configuration class.

C - Both of the above.

D - None 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 PatternLayout object?

A - If you want to generate your logging information in a particular format based on a pattern, then you can use org.apache.log4j.PatternLayout to format your logging information.

B - The PatternLayout class extends the abstract org.apache.log4j.Layout class and overrides the format() method to structure the logging information according to a supplied pattern.

C - Both of the above.

D - None of the above.

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.

Q 6 - What is the intent of %-20.30c format modifier?

A - Left pad with spaces if the category name is shorter than 20 characters. However, if the category name is longer than 30 characters, then truncate from the beginning.

B - Right pad with spaces if the category name is shorter than 20 characters. However, if the category name is longer than 30 characters, then truncate from the beginning.

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

D - None of the above.

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.

Q 8 - Which of the following DatePattern configuration of DailyRollingFileAppender rolls over the logs at the top of every hour?

A - '.' yyyy-MM

B - '.' yyyy-MM-dd

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

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

Q 9 - The Appender object is responsible for publishing logging information to various preferred destinations such as a database, file, console, UNIX Syslog, etc.

A - false

B - true

Q 10 - The log4j.properties file is a log4j configuration file which keeps properties in key-value pairs.

A - false

B - true