log4j Online Quiz

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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.

Questions and Answers

Q 1 - Which of the following is correct about log4j?

A - It is thread-safe.

B - It is optimized for speed.

C - It is based on a named logger hierarchy.

D - All of the above.

Answer : D

Explanation

All of the above options are correct.

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

A - The LogManager object manages the logging framework.

B - It is responsible for reading the initial configuration parameters from a system-wide configuration file or a configuration class.

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 level designates error events that might still allow the application to continue running?

Answer : B

Explanation

ERROR − Designates error events that might still allow the application to continue running.

Q 4 - Which of the following is true about PatternLayout object?

A - If you want to generate your logging information in a particular format based on a pattern, then you can use org.apache.log4j.PatternLayout to format your logging information.

B - The PatternLayout class extends the abstract org.apache.log4j.Layout class and overrides the format() method to structure the logging information according to a supplied pattern.

C - Both of the above.

D - None of the above.

Answer : C

Explanation

Both 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 - What is the purpose of DatePattern configuration of DailyRollingFileAppender?

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 - to set when to roll over the file.

D - None of the above.

Answer : C

Explanation

DatePattern − This indicates when to roll over the file and the naming convention to be followed. By default, roll over is performed at midnight each day.

Q 9 - What is the purpose of password configuration of JDBCAppender?

A - to set the driver class to the specified string.

B - to set the database password.

C - to specify the SQL statement to be executed every time a logging event occurs.

D - None of the above.

Answer : B

Explanation

password − Sets the database password.

Q 10 - The Level object defines the granularity and priority of any logging information.

Answer : A

Explanation

true − The Level object defines the granularity and priority of any logging information. There are seven levels of logging defined within the API: OFF, DEBUG, INFO, ERROR, WARN, FATAL, and ALL.

log4j_questions_answers.htm

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