Web / Apache Lucene Interview questions

List common built-in Analyzers in Lucene?

Lucene ships several ready-made Analyzers so common tokenization needs don't require assembling a custom chain:

Analyzer	Behavior
StandardAnalyzer	Unicode word splitting, lowercasing, English stopword removal.
WhitespaceAnalyzer	Splits only on whitespace, no lowercasing or stopwords.
SimpleAnalyzer	Splits on non-letters and lowercases; no stopword removal.
KeywordAnalyzer	Treats the whole field value as a single token.
EnglishAnalyzer	Adds English-specific stemming on top of standard tokenization.

Most teams start with StandardAnalyzer for prose fields and KeywordAnalyzer for identifier-style fields, then swap in a language-specific or custom Analyzer only once a concrete gap shows up.

Take quiz

Which analyzer adds English-specific word stemming? WhitespaceAnalyzer

✗ Try again if not.

KeywordAnalyzer

✗ Try again if not.

EnglishAnalyzer

✓ Correct! Well done.

Which analyzer performs no stopword removal and no lowercasing? WhitespaceAnalyzer

✓ Correct! Well done.

StandardAnalyzer

✗ Try again if not.

EnglishAnalyzer

✗ Try again if not.

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Define a Lucene Segment? How does Lucene score documents (TF-IDF vs BM25)? What is a TokenFilter in Lucene? What is a Lucene Directory? What is a Term in Lucene? Why do we use Analyzers with different tokenization strategies? What is a Lucene Document? What is a Tokenizer in Lucene? What is the purpose of the IndexSearcher class? What are the different types of Field in Lucene? Describe the role of the QueryParser in Lucene? List common built-in Analyzers in Lucene? What is the difference between StringField and TextField? What is the difference between IndexWriter and IndexWriterConfig? What is Apache Lucene? What is an inverted index in Lucene? What are Fields in a Lucene Document? What is an Analyzer in Lucene? What is the purpose of the IndexWriter class? When should you use StandardAnalyzer vs a custom Analyzer?

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