Question 1 of 30
In a scenario where a company is using the ELK Stack to monitor application logs, they notice that the logs are being ingested into Elasticsearch but are not appearing in Kibana for visualization. After checking the Logstash configuration, the team suspects that the issue may be related to the data format being sent to Elasticsearch. Which of the following configurations would most likely resolve the issue, ensuring that the logs are properly formatted for Elasticsearch and can be visualized in Kibana?
Configuring Logstash to use the `json` codec for input and ensuring that the output is set to Elasticsearch with the correct index name.
Setting the Logstash output to send data directly to a CSV file instead of Elasticsearch.
Using the `plain` codec in Logstash to send unstructured logs to Elasticsearch without any transformation.
Configuring Logstash to output data to a different Elasticsearch cluster that is not connected to Kibana.

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