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 internationalization.

B - It is not restricted to a predefined set of facilities.

C - Logging behavior can be set at runtime using a configuration file.

D - All of the above.

Answer : D

Explanation

All of the above options are correct.

Q 2 - Which of the following is correct about Layout object?

A - The layout layer of log4j architecture provides objects which are used to format logging information in different styles.

B - It provides support to appender objects before publishing logging information.

C - Layout objects play an important role in publishing logging information in a way that is human-readable and reusable.

D - All of the above.

Answer : D

Explanation

All 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)

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 level designates potentially harmful situations?

Answer : C

Explanation

WARN − Designates potentially harmful situations.

Q 5 - What is the purpose of n 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.

C - Used to output the number of milliseconds elapsed from the construction of the layout until the creation of the logging event.

D - Used to output the name of the thread that generated the logging event.

Answer : A

Explanation

n − Outputs the platform dependent line separator character or characters.

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 : A

Explanation

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

Q 7 - What is the purpose of bufferSize configuration of FileAppender?

A - logging information to be appended to the end of the same file.

B - to set the buffered writing.

C - to set the buffer size

D - None of the above.

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 every minute?

A - '.' yyyy-MM-dd-HH-mm

B - '.' yyyy-MM-dd

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

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

Answer : A

Explanation

'.' yyyy-MM-dd-HH-mm − Roll over every minute.

Q 9 - The layout layer of log4j architecture provides objects which are used to format logging information in different styles.

A - false

B - true

Answer : B

Explanation

true − The layout layer of log4j architecture provides objects which are used to format logging information in different styles. It provides support to appender objects before publishing logging information.

Q 10 - Appender uses the Layout objects and the conversion pattern associated with them to format the logging information.

A - false

B - true

Answer : B

Explanation

true − Appender uses the Layout objects and the conversion pattern associated with them to format the logging information.

log4j_questions_answers.htm