Free OpenSearch Certification Exam

Practice test

OpenSearch practice questions

These sample questions are in the style of the exam and are not part of its question pool. Try each one, then open the answer to check yourself against the documentation.

1. Which of these index settings can only be set when the index is created?

   • index.number_of_replicas
   • index.number_of_shards
   • index.refresh_interval
   • index.max_result_window
   Show answer

   index.number_of_shards. The number of primary shards is fixed when the index is created. Changing it means reindexing, or using the shrink or split APIs. The other three settings can be updated on a live index. Read the documentation.

2. In a bool query, which clause requires documents to match but does not contribute to the relevance score?

   • must
   • should
   • filter
   • minimum_should_match
   Show answer

   filter. Clauses under filter run in filter context: documents must match, but the clause adds nothing to the score. Read the documentation.

3. Which OpenSearch feature automates index operations such as rollover and deletion based on policies?

   • Index Lifecycle Management (ILM)
   • Index State Management (ISM)
   • Cross-cluster replication
   • Search pipelines
   Show answer

   Index State Management (ISM). Index State Management (ISM) applies policies that move an index through states and run actions such as rollover and delete. ILM is the Elasticsearch feature with a similar purpose. Read the documentation.

4. Which field type should you use for a string such as a status code that needs exact-match filtering, sorting and aggregations?

   • text
   • keyword
   • search_as_you_type
   • completion
   Show answer

   keyword. A keyword field is stored as-is, without analysis, which makes it the right choice for exact matching, sorting and aggregations. Read the documentation.

5. What is the cluster health status when every primary shard is assigned but at least one replica shard is not?

   • Green
   • Yellow
   • Red
   Show answer

   Yellow. Yellow means all primary shards are assigned and the data is searchable, but one or more replicas are unassigned. Red means at least one primary shard is unassigned. Read the documentation.