Boolean and binary types in Elasticsearch - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the Boolean type in Elasticsearch?

The Boolean type in Elasticsearch stores true or false values. It is used to represent binary states like yes/no or on/off.

beginner

How do you define a Boolean field in an Elasticsearch mapping?

You define a Boolean field by setting its type to "boolean" in the mapping, for example:<br>

{ "properties": { "my_field": { "type": "boolean" } } }

intermediate

What is the Binary type used for in Elasticsearch?

The Binary type stores binary data encoded as Base64 strings. It is useful for storing small files or encoded data directly in documents.

intermediate

How do you store binary data in Elasticsearch?

You store binary data by encoding it in Base64 and defining the field type as "binary" in the mapping, like:<br>

{ "properties": { "file_data": { "type": "binary" } } }

beginner

Can Boolean fields be used for filtering in Elasticsearch queries?

Yes, Boolean fields are commonly used in filters and queries to quickly match documents where the field is true or false.

What values can a Boolean type field in Elasticsearch hold?

A any number

B Base64 encoded data

C text strings

D true or false

Boolean fields only hold true or false values.

How should binary data be stored in Elasticsearch?

A Encoded in Base64 with type 'binary'

B As integer arrays

C As Boolean values

D As plain text

Binary data must be Base64 encoded and stored in a field with type 'binary'.

Which Elasticsearch field type is best for storing true/false flags?

A text

B boolean

C binary

D keyword

The 'boolean' type is designed for true/false flags.

What encoding is required for binary fields in Elasticsearch?

A Base64

B ASCII

C UTF-8

D Hexadecimal

Binary fields require Base64 encoding.

Can Boolean fields be used in Elasticsearch filters?

A Only binary fields can be filtered

B No, only numeric fields can be filtered

C Yes, Boolean fields are commonly filtered

D Only text fields can be filtered

Boolean fields are often used in filters to select documents based on true or false values.

Explain how Boolean and binary types are used in Elasticsearch and how to define them in mappings.

Think about simple true/false flags and storing small files or encoded data.

Describe the process and requirements for storing binary data in Elasticsearch documents.

Focus on encoding and mapping type.