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?
B - log4j has been ported to the C, C++, C#, Perl, Python, Ruby, and Eiffel languages.
C - log4j is highly configurable through external configuration files at runtime.
Answer : D
Explanation
All of the above options are correct.
Q 2 - Which of the following is correct about log4j.properties?
B - By default, the LogManager looks for a file named log4j.properties in the CLASSPATH.
Answer : C
Explanation
Both of the above options are correct.
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)
Answer : B
Explanation
public void trace(Object message) of Logger class prints messages with the level Level.TRACE.
Q 4 - Which of the following level is intended to turn off logging?
Answer : A
Explanation
OFF − The highest possible rank and is intended to turn off logging.
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.
Answer : D
Explanation
M − Used to output the method 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 fileAppend configuration of FileAppender?
A - logging information to be appended to the end of the same file.
Answer : A
Explanation
fileAppend − This is by default set to true, which means the logging information being appended to the end of the same file.
Q 8 - Which of the following DatePattern configuration of DailyRollingFileAppender rolls over the logs every minute?
Answer : A
Explanation
'.' yyyy-MM-dd-HH-mm − Roll over every minute.
Q 9 - The Appender object is responsible for publishing logging information to various preferred destinations such as a database, file, console, UNIX Syslog, etc.
Answer : B
Explanation
true − The Appender object is responsible for publishing logging information to various preferred destinations such as a database, file, console, UNIX Syslog, etc.
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.
