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 log4j objects are responsible for formatting logging information in different styles?
Answer : C
Explanation
layouts − Responsible for formatting logging information in different styles.
Q 2 - Which of the following is correct about target in Appender?
B - The target may be a console, a file, or another item depending on the appender.
C - The target is required to control the filtration of the log messages.
D - Appender can have a target associated with it independent of the logger level.
Answer : B
Explanation
target − The target may be a console, a file, or another item depending on the appender.
Q 3 - Which of the following method of logger print a log message in fatal mode?
A - public void debug(Object message)
B - public void error(Object message)
Answer : C
Explanation
public void fatal(Object message) of Logger class prints messages with the level Level.FATAL.
Q 4 - Which of the following level designates finer-grained informational events than the DEBUG?
Answer : B
Explanation
TRACE − Designates finer-grained informational events than the DEBUG.
Q 5 - What is the purpose of t 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 : D
Explanation
t − Used to output the name of the thread that generated the logging event.
Q 6 - What is the intent of %-20c format modifier?
A - Left pad with spaces if the category name is less than 20 characters long.
B - Right pad with spaces if the category name is less than 20 characters long.
C - Truncate from the beginning if the category name is longer than 20 characters.
Answer : B
Explanation
%-20c − Right pad with spaces if the category name is less than 20 characters long.
Q 7 - What is the purpose of bufferSize configuration of FileAppender?
A - logging information to be appended to the end of the same file.
Answer : C
Explanation
bufferSize − If buffered I/O is enabled, it indicates the buffer size. By default, it is set to 8kb.
Q 8 - Which of the following DatePattern configuration of DailyRollingFileAppender rolls over the logs at midnight each day?
Answer : B
Explanation
'.' yyyy-MM-dd − Roll over at midnight each day. This is the default value.
Q 9 - The top-level layer of log4j architecture is the Logger which provides the Logger object.
Answer : A
Explanation
true − The top-level layer of log4j architecture is the Logger which provides the Logger object. The Logger object is responsible for capturing logging information and they are stored in a namespace hierarchy.
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.
