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.

B - The Logger object is responsible for capturing logging information and they are stored in a namespace hierarchy.

C - Both of the above.

D - None of the above.

Answer : C

Explanation

Both of the above options are correct.

Q 2 - Which of the following is correct about level in Appender?

A - Appender uses the level and the conversion pattern associated with them to format the logging information.

B - The level may be a console, a file, or another item depending on the appender.

C - The level is required to control the filtration of the log messages.

D - Appender can have a level associated with it independent of the logger level.

Answer : C

Explanation

level − The level is required to control the filtration of the log messages.

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)

C - public void fatal(Object message)

D - public void info(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 is true about log4j levels?

A - A log request of level p in a logger with level q is enabled if p >= q.

B - A log request assumes that levels are ordered.

C - For the standard levels, we have ALL < DEBUG < INFO < WARN < ERROR < FATAL < OFF.

D - All of the above.

Answer : D

Explanation

All of the above options are correct.

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 : C

Explanation

m − Used to output the application supplied message associated with the logging event.

Q 6 - What is the purpose of X character used in the conversionPattern of PatternLayout object?

A - Used to output the NDC (nested diagnostic context) associated with the thread that generated the logging event.

B - Used to print the information stored in the MDC against the key.

C - Used to print a % sign.

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 immediateFlush configuration of FileAppender?

A - output stream to the file being flushed with each append operation.

B - to set the platform-specific encoding scheme.

C - to set the threshold level for this appender.

D - to set the name of the log file.

Answer : A

Explanation

immediateFlush − This flag is by default set to true, which means the output stream to the file being flushed with each append operation.

Q 8 - Which of the following DatePattern configuration of DailyRollingFileAppender rolls over the logs at the end of each month and at the beginning of the next month?

A - '.' yyyy-MM

B - '.' yyyy-MM-dd

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

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