Why performance tuning handles growth in Elasticsearch - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the number of shards for an index.

Elasticsearch

PUT /my_index
{
  "settings": {
    "number_of_shards": [1]
  }
}

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

A5

B3

C1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Setting number_of_shards to 0 causes errors.

Using too many shards can reduce performance.

The default and minimum number of shards is 1, which allows the index to store data and scale properly.

2fill in blank

medium

Complete the code to update the refresh interval for better indexing performance.

Elasticsearch

PUT /my_index/_settings
{
  "index": {
    "refresh_interval": [1]
  }
}

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

A"-1"

B"30s"

C"1s"

D"0s"

Attempts:

3 left

💡 Hint

Common Mistakes

Using "0s" is invalid.

Setting refresh_interval too low can hurt indexing speed.

Setting refresh_interval to "-1" disables automatic refresh, improving indexing speed during heavy writes.

3fill in blank

hard

Fix the error in the query to filter documents by a field value.

Elasticsearch

{
  "query": {
    "term": {
      "status": [1]
    }
  }
}

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

A"active"

Btrue

C"status"

Dactive

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting quotes around string values.

Using field names instead of values.

The term query requires the value to be a string in quotes, like "active".

4fill in blank

hard

Fill both blanks to create a range query filtering documents with age greater than 30.

Elasticsearch

{
  "query": {
    "range": {
      "age": {
        "[1]": [2]
      }
    }
  }
}

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

Agt

B30

Cgte

D25

Attempts:

3 left

💡 Hint

Common Mistakes

Using "gte" includes 30, not strictly greater.

Putting the number in quotes causes errors.

Using "gt" means greater than, and 30 is the value to compare.

5fill in blank

hard

Fill all three blanks to create an aggregation that counts documents per status where count is greater than 5.

Elasticsearch

{
  "aggs": {
    "status_count": {
      "terms": {
        "field": "[1]"
      },
      "aggs": {
        "filtered_count": {
          "bucket_selector": {
            "buckets_path": {
              "count": "_count"
            },
            "script": "params.count [2] [3]"
          }
        }
      }
    }
  }
}

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

Astatus

B>

C5

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong field name.

Using >= instead of >.

Putting numbers in quotes in script.

The aggregation groups by the "status" field, then filters buckets where count > 5.