# ChallengePreference
<a name="API_ChallengePreference"></a>

An ordered list of preferred challenge type and versions.

## Contents
<a name="API_ChallengePreference_Contents"></a>

 ** Type **   <a name="rekognition-Type-ChallengePreference-Type"></a>
The types of challenges that have been selected for the Face Liveness session.  
Type: String  
Valid Values: `FaceMovementAndLightChallenge | FaceMovementChallenge`   
Required: Yes

 ** Versions **   <a name="rekognition-Type-ChallengePreference-Versions"></a>
The version of the challenges that have been selected for the Face Liveness session.  
Type: [Versions](API_Versions.md) object  
Required: No

## See Also
<a name="API_ChallengePreference_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/rekognition-2016-06-27/ChallengePreference) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/rekognition-2016-06-27/ChallengePreference) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/rekognition-2016-06-27/ChallengePreference)