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?

A - loggers

B - appenders

C - layouts

D - None of the above.

Answer : C

Explanation

layouts − Responsible for formatting logging information in different styles.

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.

B - The Appender object is responsible for publishing logging information to various preferred destinations such as a database, file, console, UNIX Syslog, etc.

C - Both of the above.

D - None of the above.

Answer : C

Explanation

Both of the above options are correct.

Q 3 - Which of the following method of logger print a log message in error 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 : B

Explanation

public void error(Object message) of Logger class prints messages with the level Level.ERROR.

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 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 - Which of the following set title for the HTML file using HTMLLayout?

A - HTMLLayout.setContentType(String)

B - HTMLLayout.setLocationInfo(String)

C - HTMLLayout.setTitle(String)

D - None of the above.

Answer : C

Explanation

HTMLLayout.setTitle(String) − Sets the title for the HTML file. Default is log4j Log Messages.

Q 8 - What is the purpose of maxBackupIndex configuration of RollingFileAppender?

A - to set the critical size of the file above which the file will be rolled.

B - to set the number of backup files to be created.

C - Both of the above.

D - None of the above.

Answer : B

Explanation

maxBackupIndex − This property denotes the number of backup files to be created.

Q 9 - The Appender object is responsible for publishing logging information to various preferred destinations such as a database, file, console, UNIX Syslog, etc.

A - false

B - true

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 - By default, the LogManager looks for a file named log4j.properties in the CLASSPATH.

A - false

B - true

Answer : B

Explanation

true − By default, the LogManager looks for a file named log4j.properties in the CLASSPATH.

log4j_questions_answers.htm