Web / Apache Solr Interview questions

What is a filter in the Solr analysis chain?

A token filter runs after the tokenizer and transforms the token stream it receives, either by modifying tokens, adding new ones, or dropping some entirely. An analyzer can chain many filters in sequence.

Frequently used filters include:

LowerCaseFilter - normalizes case so "Apple" matches "apple".
StopFilter - removes common words like "the" or "and".
SynonymGraphFilter - expands terms to include synonyms.
PorterStemFilter - reduces words to a root form, so "running" becomes "run".

Because filters run in order, sequence matters: lowercasing before stemming, for example, avoids case-sensitive mismatches in the stemmed output.

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Which filter removes common words such as "the" and "and"? LowerCaseFilter

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StopFilter

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PorterStemFilter

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Does the order of filters in the chain matter? Yes, each filter processes the previous filter's output

✓ Correct! Well done.

No, filters always run independently of order

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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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