To implement a custom untyped user-defined aggregation function, the user has to extend the which class 1. None of the options 2. UserDefinedAggregateFunction 3. UDFAggregateFunction 4. UserDefinedFunction
To implement a custom untyped user-defined aggregation function, the user has to extend the which class 1. None of the options 2. UserDefinedAggregateFunction 3. UDFAggregateFunction 4. UserDefinedFunction 🔗Reference : W3school.com
🔗Source: Interview Questions and Answers
🔗Reference: Javatpoint.com
Answer is UserDefinedAggregateFunction