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 supports multiple output appenders per logger.
B - It is optimized for speed.
Answer : D
Explanation
All of the above options are correct.
Q 2 - Which of the following is correct about Filter object?
B - An Appender objects can have several Filter objects associated with them.
Answer : C
Explanation
Both of the above options are correct.
Q 3 - Which of the following method of logger print a log message in info mode?
A - public void debug(Object message)
B - public void error(Object message)
Answer : D
Explanation
public void info(Object message) of Logger class prints messages with the level Level.INFO.
Q 4 - Which of the following level designates all levels including custom levels?
Answer : D
Explanation
ALL − All levels including custom levels.
Q 5 - What is the purpose of F character used in the conversionPattern of PatternLayout object?
A - Used to output the category of the logging event.
B - Used to output the fully qualified class name of the caller issuing the logging request.
C - Used to output the date of the logging event.
D - Used to output the file name where the logging request was issued.
Answer : D
Explanation
F − Used to output the file name where the logging request was issued.
Q 6 - What is the purpose of X character used in the conversionPattern of PatternLayout object?
B - Used to print the information stored in the MDC against the key.
D - Used to Left pad with spaces if the category name is less than 20 characters long.
Answer : B
Explanation
X − The X conversion character is followed by the key for the MDC. For example, X{clientIP} will print the information stored in the MDC against the key clientIP.
Q 7 - What is the purpose of encoding configuration of FileAppender?
A - output stream to the file being flushed with each append operation.
B - to set the platform-specific encoding scheme.
Answer : B
Explanation
encoding − It is possible to use any character-encoding. By default, it is the platform-specific encoding scheme.
Q 8 - Which of the following DatePattern configuration of DailyRollingFileAppender rolls over the logs at midday and midnight of each day?
Answer : C
Explanation
'.' yyyy-MM-dd-a − Roll over at midday and midnight of each day.
Q 9 - How will you put the logs in database using log4j??
Answer : A
Explanation
The log4j API provides the org.apache.log4j.jdbc.JDBCAppender object, which can put logging information in a specified database.
Q 10 - Logger uses the Layout objects and the conversion pattern associated with them to format the logging information.
Answer : B
Explanation
false − Appender uses the Layout objects and the conversion pattern associated with them to format the logging information.
