Constant score query in Elasticsearch - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a constant score query in Elasticsearch?

A constant score query wraps another query and returns a fixed score for all matching documents, ignoring the relevance score of the wrapped query.

beginner

Why would you use a constant score query instead of a regular query?

To improve performance when you only need to filter documents without scoring them differently, or when you want all matching documents to have the same score.

beginner

How do you specify a constant score query in Elasticsearch JSON DSL?

You use the constant_score object with a filter or query inside it, like this:<br>

{"constant_score": {"filter": { ... }}}

beginner

What happens to the score of documents matched by a constant score query?

All matched documents receive the same fixed score, which is 1 by default, regardless of how well they match the inner query.

intermediate

Can you combine a constant score query with other queries in Elasticsearch?

Yes, you can combine it inside a bool query or other compound queries to control scoring behavior for parts of your search.

What does a constant score query do in Elasticsearch?

A Sorts documents by date

B Returns the same score for all matching documents

C Scores documents based on term frequency

D Filters documents without scoring

A constant score query returns a fixed score for all documents that match the inner query or filter.

Which key is used inside a constant score query to specify the condition?

A match

B range

C term

D filter

The filter key is used inside a constant score query to specify the condition that documents must meet.

What is the default score assigned by a constant score query to matching documents?

A 1

B 0

C Variable based on relevance

D 10

By default, all matching documents get a score of 1 in a constant score query.

Why might you choose a constant score query over a regular query?

A To highlight matched terms

B To get more accurate relevance scores

C To improve performance by skipping scoring calculations

D To sort results by score

Constant score queries improve performance by avoiding complex scoring calculations.

Can a constant score query be used inside a bool query?

A Yes

B No

C Only in filters

D Only with term queries

Constant score queries can be combined inside bool queries to control scoring behavior.

Explain what a constant score query is and when you would use it.

Think about scoring and filtering in search results.

Describe how to write a constant score query in Elasticsearch JSON DSL.

Focus on the JSON keys and nesting.