Replica management in Elasticsearch - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the number of replicas to 2 for an index.

Elasticsearch

{
  "settings": {
    "number_of_replicas": [1]
  }
}

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

A0

B3

C2

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Setting replicas to 0 disables replication.

Using a string instead of a number.

The number_of_replicas setting controls how many replica shards each primary shard has. Setting it to 2 means two copies of each shard will be created.

2fill in blank

medium

Complete the code to update the number of replicas to 1 for an existing index named 'products'.

Elasticsearch

PUT /products/_settings
{
  "index": {
    "number_of_replicas": [1]
  }
}

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

A1

B2

C3

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to update replicas with a POST request.

Using the wrong index name.

To update replicas for an existing index, you send a PUT request to /_settings with the new number_of_replicas. Here, setting it to 1 means one replica shard.

3fill in blank

hard

Fix the error in the code to correctly set replicas to 0 for the index 'logs'.

Elasticsearch

PUT /logs/_settings
{
  "index": {
    "number_of_replicas": [1]
  }
}

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

A"0"

Bfalse

C"zero"

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around numbers.

Using boolean values instead of numbers.

The number_of_replicas setting expects a number, not a string or boolean. So use 0 without quotes to disable replicas.

4fill in blank

hard

Fill both blanks to create a settings update that sets replicas to 3 and refresh interval to 30s.

Elasticsearch

PUT /archive/_settings
{
  "number_of_replicas": [1],
  "refresh_interval": [2]
}

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

A3

B"30s"

C"30 seconds"

D30

Attempts:

3 left

💡 Hint

Common Mistakes

Using a number without quotes for refresh interval.

Using an invalid string format for refresh interval.

The number_of_replicas is a number, so use 3. The refresh_interval expects a string with time units, so use "30s" for 30 seconds.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps index names to their replica count if replicas are greater than 1.

Elasticsearch

replica_counts = {index[1]: settings[2] for index, settings in indices.items() if settings.get('number_of_replicas', 0) [3] 1}

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

A.upper()

B['number_of_replicas']

C>

D['replicas']

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong keys to access replica count.

Using incorrect comparison operators.

This comprehension creates a new dictionary where keys are uppercase index names (index.upper()), values are the replica count from settings (settings['number_of_replicas']), and only includes those with replicas greater than 1.