
- log4j Tutorial
- log4j - Home
- log4j - Overview
- log4j - Installation
- log4j - Architecture
- log4j - Configuration
- log4j - Sample Program
- log4j - Logging Methods
- log4j - Logging Levels
- log4j - Log Formatting
- log4j - Logging in Files
- log4j - Logging in Database
- log4j Useful Resources
- log4j - Questions and Answers
- log4j - Quick Guide
- log4j - Useful Resources
- log4j - Discussion
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
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?
B - log4j has been ported to the C, C++, C#, Perl, Python, Ruby, and Eiffel languages.
C - log4j is highly configurable through external configuration files at runtime.
Answer : D
Explanation
All of the above options are correct.
Q 2 - Which of the following is correct about level in Appender?
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 is correct about filter in Appender?
B - The filter may be a console, a file, or another item depending on the appender.
C - The filter is required to control the filtration of the log messages.
D - Appender can have a filter associated with it independent of the logger level.
Answer : A
Explanation
filter − The Filter objects can analyze logging information beyond level matching and decide whether logging requests should be handled by a particular Appender or ignored.
Q 4 - What is the purpose of C character used in the conversionPattern of PatternLayout object?
A - Used to output the category of the logging event.
B - Used to output the fully qualified class name of the caller issuing the logging request.
C - Used to output the date of the logging event.
D - Used to output the file name where the logging request was issued.
Answer : B
Explanation
C − Used to output the fully qualified class name of the caller issuing the logging request. For example, for the class name.* "org.apache.xyz.SomeClass", the pattern %C{1} will output "SomeClass".
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.
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 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 : C
Explanation
%.20c − Truncate from the beginning if the category name is longer than 20 characters.
Q 7 - What is the purpose of Filename configuration of FileAppender?
A - output stream to the file being flushed with each append operation.
B - to set the platform-specific encoding scheme.
Answer : D
Explanation
Filename − The name of the log file.
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.
Answer : B
Explanation
maxBackupIndex − This property denotes the number of backup files to be created.
Q 9 - What is the purpose of URL configuration of JDBCAppender?
B - to set the database password.
C - to specify the SQL statement to be executed every time a logging event occurs.
Answer : A
Explanation
URL − Sets the JDBC URL.
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.