Wildcard and prefix queries in Elasticsearch - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a wildcard query that matches any word starting with "test".

Elasticsearch

{
  "query": {
    "wildcard": {
      "field": [1]
    }
  }
}

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

A"*test"

B"test?"

C"test"

D"test*"

Attempts:

3 left

💡 Hint

Common Mistakes

Using ? instead of * for multiple characters

Not including the wildcard symbol

Placing * before the word instead of after

The wildcard query uses an asterisk (*) to match any characters after "test".

2fill in blank

medium

Complete the code to create a prefix query that matches all words starting with "pre".

Elasticsearch

{
  "query": {
    "prefix": {
      "field": [1]
    }
  }
}

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

A"pre"

B"pre*"

C"prefix"

D"*pre"

Attempts:

3 left

💡 Hint

Common Mistakes

Adding * wildcard in prefix query

Using the full word instead of prefix

Using wildcard query syntax instead of prefix

The prefix query takes the prefix string directly without wildcards.

3fill in blank

hard

Fix the error in the wildcard query pattern to match words ending with "ing".

Elasticsearch

{
  "query": {
    "wildcard": {
      "field": [1]
    }
  }
}

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

A"ing*"

B"*ing"

C"?ing"

D"ing"

Attempts:

3 left

💡 Hint

Common Mistakes

Placing * after "ing" instead of before

Using ? instead of * for multiple characters

Not using any wildcard

To match words ending with "ing", use the wildcard * before "ing".

4fill in blank

hard

Fill both blanks to create a wildcard query matching words containing "cat" anywhere.

Elasticsearch

{
  "query": {
    "wildcard": {
      "field": [1],
      "value": [2]
    }
  }
}

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

A"description"

B"*cat*"

C"title"

D"cat*"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a prefix pattern instead of wildcard with * on both sides

Choosing a wrong field name

Omitting the wildcard characters

The field is "description" and the wildcard pattern "*cat*" matches "cat" anywhere in the word.

5fill in blank

hard

Fill all three blanks to create a prefix query on "name" field with prefix "jo" and boost it by 2.0.

Elasticsearch

{
  "query": {
    "prefix": {
      [1]: {
        "value": [2],
        "boost": [3]
      }
    }
  }
}

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

A"name"

B"jo"

C2.0

D"john"

Attempts:

3 left

💡 Hint

Common Mistakes

Using the prefix value as the field name

Omitting the boost or using wrong boost value

Using a full word instead of prefix

The prefix query uses the field "name", prefix value "jo", and boost 2.0 to increase relevance.