Web / Apache Solr Interview questions

What is the purpose of solrconfig.xml?

solrconfig.xml is the operational control file for a Solr core or collection. It does not define field names or types; that's the schema's job. Instead it configures how Solr behaves at runtime.

Request handlers - which endpoints exist (/select, /update) and their default parameters.
Caches - filter cache, query result cache, document cache sizes and autowarm counts.
Commit behavior - autoCommit and autoSoftCommit intervals.
Update processors and listeners - logic that runs during indexing.

Because it drives performance-sensitive settings like caching and commits, it is one of the first files tuned when optimizing a Solr deployment.

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Which of these is configured in solrconfig.xml rather than the schema? Field names and types

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Cache sizes and commit intervals

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Dynamic field patterns

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What defines endpoints like /select and /update? Request handler definitions in solrconfig.xml

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The managed-schema file

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ZooKeeper's cluster state znode

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What is a Solr collection? What is highlighting in Solr search results? How do you optimize Solr for high-throughput near real-time indexing? What is a Solr core? List the ways to import data into Solr? How do you apply faceting in a Solr query? What is a filter in the Solr analysis chain? Explain the execution flow of an atomic update in Solr? What is Apache Solr? What are the types of fields in Solr? What is an inverted index in Solr? How do you connect to Solr using SolrJ? What is the DataImportHandler in Solr? What are the types of Solr request handlers? Define analyzer in Solr? Describe tokenizer in Solr? What is SolrCloud? What is the purpose of managed-schema in Solr? What is the purpose of solrconfig.xml? What is the purpose of a query parser in Solr?

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