Top 50 FluentD Interview Questions with Answers

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What is Fluentd?
a) A logging system
b) A web server
c) A programming language
d) None of the above

Answer: a) A logging system

Which programming language is Fluentd written in?
a) Ruby
b) Python
c) Java
d) C++

Answer: a) Ruby

What is the purpose of Fluentd?
a) To collect, merge, and transfer log data
b) To create web applications
c) To manage network devices
d) None of the above

Answer: a) To collect, merge, and transfer log data

Which type of data can Fluentd collect?
a) Text files
b) JSON
c) CSV
d) All of the above

Answer: d) All of the above

What are the three components of Fluentd?
a) Input, Parser, Output
b) Parser, Output, Filter
c) Input, Output, Filter
d) None of the above

Answer: c) Input, Output, Filter

What is a Fluentd plugin?
a) A pre-built program that performs a specific function
b) A custom program written by the user
c) A module that handles Fluentd’s core functions
d) None of the above

Answer: a) A pre-built program that performs a specific function

Which command is used to start Fluentd?
a) service fluentd start
b) fluentd start
c) systemctl start fluentd
d) None of the above

Answer: c) systemctl start fluentd

Which parameter is used to set the listening port for Fluentd?
a) port
b) listen
c) input
d) None of the above

Answer: b) listen

Which parameter is used to set the output destination for Fluentd?
a) output
b) destination
c) store
d) None of the above

Answer: a) output

What is the purpose of the buffer in Fluentd?
a) To store log data temporarily
b) To filter log data
c) To parse log data
d) None of the above

Answer: a) To store log data temporarily

Which plugin is used to read log files?
a) in_file
b) file_reader
c) input_file
d) None of the above

Answer: a) in_file

Which plugin is used to write log files?
a) out_file
b) file_writer
c) output_file
d) None of the above

Answer: a) out_file

Which plugin is used to parse JSON data?
a) json_parser
b) json
c) parse_json
d) None of the above

Answer: c) parse_json

Which plugin is used to parse CSV data?
a) csv
b) parse_csv
c) csv_parser
d) None of the above

Answer: a) csv

What is the purpose of the tag in Fluentd?
a) To identify the log data
b) To filter log data
c) To parse log data
d) None of the above

Answer: a) To identify the log data

Which parameter is used to set the log level for Fluentd?
a) log_level
b) level
c) debug_level
d) None of the above

Answer: b) level

What is the purpose of the filter in Fluentd?
a) To modify log data
b) To store log data
c) To transfer log data
d) None of the above

Answer: a) To modify log data

Which plugin is used to send log data to Elasticsearch?
a) elasticsearch
b) es_output
c) send_to_elk
d) None of the above

Answer: a) elasticsearch

Which plugin is used to send log data to Kafka?
a) kafka
b) kafka_output
c) send_to_kafka
d) None of the above

Answer: a) kafka

Which parameter is used to set the hostname for Fluentd?
a) hostname
b) host
c) input_host
d) None of the above

Answer: b) host

Which plugin is used to read data from a TCP socket?
a) tcp
b) socket_input
c) input_tcp
d) None of the above

Answer: a) tcp

Which plugin is used to write data to a TCP socket?
a) tcp
b) socket_output
c) output_tcp
d) None of the above

Answer: a) tcp

Which plugin is used to collect Docker container logs?
a) docker
b) collect_docker
c) docker_logs
d) None of the above

Answer: a) docker

Which command is used to check the status of Fluentd?
a) service fluentd status
b) fluentd status
c) systemctl status fluentd
d) None of the above

Answer: c) systemctl status fluentd

Which plugin is used to parse Apache access logs?
a) apache
b) access_log
c) parse_apache
d) None of the above

Answer: b) access_log

Which parameter is used to set the HTTP endpoint for Fluentd?
a) endpoint
b) http_endpoint
c) input_http
d) None of the above

Answer: b) http_endpoint

Which plugin is used to send log data to Amazon S3?
a) s3
b) aws_s3_output
c) send_to_s3
d) None of the above

Answer: a) s3

Which plugin is used to parse Syslog messages?
a) syslog
b) parse_syslog
c) rsyslog
d) None of the above

Answer: b) parse_syslog

Which parameter is used to set the syslog protocol in Fluentd?
a) protocol
b) syslog_protocol
c) input_syslog
d) None of the above

Answer: b) syslog_protocol

Which plugin is used to send log data to a remote destination using the secure shell protocol (SSH)?
a) ssh
b) secure_shell
c) ssh_output
d) None of the above

Answer: a) ssh

Which plugin is used to write log data to MongoDB?
a) mongodb
b) mongo_output
c) send_to_mongo
d) None of the above

Answer: a) mongodb

Which parameter is used to set the output format for Fluentd?
a) output_format
b) format
c) log_format
d) None of the above

Answer: b) format

Which plugin is used to monitor Fluentd’s internal status?
a) monitor_agent
b) agent
c) fluentd_status
d) None of the above

Answer: a) monitor_agent

Which plugin is used to parse XML data?
a) xml
b) parse_xml
c) xml_parser
d) None of the above

Answer: a) xml

Which plugin is used to parse Apache error logs?
a) apache
b) error_log
c) parse_apache_error
d) None of the above

Answer: b) error_log

Which parameter is used to set the output format for Elasticsearch in Fluentd?
a) elasticsearch_format
b) output_format
c) format
d) None of the above

Answer: a) elasticsearch_format

Which plugin is used to send log data to Amazon CloudWatch?
a) cloudwatch
b) aws_cloudwatch_output
c) send_to_cloudwatch
d) None of the above

Answer: a) cloudwatch

Which plugin is used to write log data to Hadoop HDFS?
a) hdfs
b) hadoop_hdfs_output
c) send_to_hdfs
d) None of the above

Answer: a) hdfs

Which parameter is used to set the buffer type for Fluentd?
a) buffer_type
b) type
c) buffer
d) None of the above

Answer: b) type

Which plugin is used to read log data from Amazon S3?
a) s3
b) aws_s3_input
c) collect_from_s3
d) None of the above

Answer: b) aws_s3_input

Which plugin is used to send log data to a remote destination using the Fluentd Forward protocol?
a) forward
b) fluentd_forward
c) send_to_forward
d) None of the above

Answer: a) forward

Which plugin is used to send log data to a remote destination using the TCP protocol?
a) tcp
b) tcp_output
c) send_to_tcp
d) None of the above

Answer: a) tcp

Which plugin is used to send log data to a remote destination using the HTTP protocol?
a) http
b) http_output
c) send_to_http
d) None of the above

Answer: a) http

Which parameter is used to set the path for Fluentd’s configuration file?
a) path
b) config_path
c) input_path
d) None of the above

Answer: b) config_path

Which plugin is used to parse Nginx access logs?
a) nginx
b) access_log
c) parse_nginx
d) None of the above

Answer: c) parse_nginx

Which plugin is used to parse Nginx error logs?
a) nginx
b) error_log
c) parse_nginx_error
d) None of the above

Answer: b) error_log

Which parameter is used to set the output format for Kafka in Fluentd?
a) kafka_format
b) output_format
c) format
d) None of the above

Answer: a) kafka_format

Which plugin is used to read log data from a Unix socket?
a) unix
b) socket_input
c) input_unix
d) None of the above

Answer: a) unix

Which plugin is used to write log data to a Unix socket?
a) unix
b) socket_output
c) output_unix
d) None of the above

Answer: a) unix

Which plugin is used to collect log data from Kubernetes?
a) kubernetes
b) collect_from_k8s
c) k8s_logs
d) None of the above

Answer: a) kubernetes

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Ashwani Kumar

Sr. Software Engineer at Cotocus Private Limited

There is no end to education. It is not that you read a book, pass an examination, and finish with education. The whole of life, from the moment you are born to the moment you die, is a process of learning.