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 Logger object?
A - The top-level layer of log4j architecture is the Logger which provides the Logger object.
Answer : C
Explanation
Both 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.
Answer : C
Explanation
Both of the above options are correct.
Q 3 - Which of the following method of logger print a log message in warn mode?
A - public void warn(Object message)
B - public void error(Object message)
Answer : A
Explanation
public void warn(Object message) of Logger class prints messages with the level Level.WARN.
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 r 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.
D - Used to output the name of the thread that generated the logging event.
Answer : C
Explanation
r − Used to output the number of milliseconds elapsed from the construction of the layout until the creation of the logging event.
Q 6 - Which of the following is correct about org.apache.log4j.HTMLLayout class?
B - It provides the name of the thread that invoked the logging request.
C - It provides the level associated with this logging request.
Answer : D
Explanation
All of the above options are correct.
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 the top of every hour?
Answer : D
Explanation
'.' yyyy-MM-dd-HH − Roll over at the top of every hour.
Q 9 - What is the purpose of sql configuration of JDBCAppender?
A - to set the driver class to the specified string.
B - to set the database password.
C - to specify the SQL statement to be executed every time a logging event occurs.
Answer : C
Explanation
sql − Specifies the SQL statement to be executed every time a logging event occurs. This could be INSERT, UPDATE, or DELETE.
Q 10 - The log4j.properties file is a log4j configuration file which keeps properties in key-value pairs.
Answer : B
Explanation
true − The log4j.properties file is a log4j configuration file which keeps properties in key-value pairs. By default, the LogManager looks for a file named log4j.properties in the CLASSPATH.
