Token filters (lowercase, stemmer, synonym) in Elasticsearch - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a lowercase token filter in the analyzer.

Elasticsearch

{
  "settings": {
    "analysis": {
      "analyzer": {
        "my_analyzer": {
          "tokenizer": "standard",
          "filter": ["[1]"]
        }
      },
      "filter": {
        "lowercase_filter": {
          "type": "lowercase"
        }
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Asynonym_filter

Bstemmer_filter

Clowercase_filter

Dstop_filter

Attempts:

3 left

💡 Hint

Common Mistakes

Using a filter name that is not defined in the filter section.

Confusing filter names like stemmer or synonym instead of lowercase.

The lowercase token filter converts all tokens to lowercase. Here, the filter named lowercase_filter is added to the analyzer's filter list.

2fill in blank

medium

Complete the code to add a stemmer token filter named "english_stemmer".

Elasticsearch

{
  "settings": {
    "analysis": {
      "filter": {
        "english_stemmer": {
          "type": "[1]",
          "language": "english"
        }
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Astemmer

Blowercase

Cstop

Dsynonym

Attempts:

3 left

💡 Hint

Common Mistakes

Using "stemmer_filter" instead of "stemmer" as the type.

Confusing stemmer with synonym or lowercase types.

The stemmer filter reduces words to their root form. The type for this filter is "stemmer".

3fill in blank

hard

Fix the error in the synonym filter definition by completing the missing type.

Elasticsearch

{
  "settings": {
    "analysis": {
      "filter": {
        "my_synonym_filter": {
          "type": "[1]",
          "synonyms": [
            "quick,fast",
            "jumps,leaps"
          ]
        }
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Asynonym

Bstemmer

Clowercase

Dstop

Attempts:

3 left

💡 Hint

Common Mistakes

Using "synonym_filter" instead of "synonym" as the type.

Confusing synonym filter type with stemmer or lowercase.

The synonym filter type must be set to "synonym" to work correctly with synonym lists.

4fill in blank

hard

Fill both blanks to create an analyzer that uses the standard tokenizer and applies lowercase and stemmer filters.

Elasticsearch

{
  "settings": {
    "analysis": {
      "analyzer": {
        "custom_analyzer": {
          "tokenizer": "[1]",
          "filter": ["lowercase_filter", "[2]"]
        }
      },
      "filter": {
        "lowercase_filter": {
          "type": "lowercase"
        },
        "english_stemmer": {
          "type": "stemmer",
          "language": "english"
        }
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Astandard

Benglish_stemmer

Ckeyword

Dsynonym_filter

Attempts:

3 left

💡 Hint

Common Mistakes

Using "keyword" tokenizer instead of "standard".

Using filter names not defined in the filter section.

The standard tokenizer splits text into words. The filters applied are lowercase and the English stemmer filter.

5fill in blank

hard

Fill all three blanks to define a synonym filter and use it in an analyzer with lowercase and standard tokenizer.

Elasticsearch

{
  "settings": {
    "analysis": {
      "filter": {
        "my_synonym_filter": {
          "type": "[1]",
          "synonyms": ["fast,quick", "jumps,leaps"]
        }
      },
      "analyzer": {
        "synonym_analyzer": {
          "tokenizer": "[2]",
          "filter": ["[3]", "my_synonym_filter"]
        }
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Asynonym

Bstandard

Clowercase

Dstemmer

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect filter types like "stemmer" for synonyms.

Placing filters in wrong order or using undefined filters.

The synonym filter type is "synonym". The analyzer uses the "standard" tokenizer and applies the "lowercase" filter before the synonym filter.