Which type of robot operates without needing human intervention?

An unattended robot operates autonomously without requiring any human intervention. This type of robot is designed to execute tasks and processes continuously and can function 24/7, making it ideal for jobs that require high volumes of data processing or consistent performance without the need for human oversight. Unattended robots are typically deployed on a server and can manage tasks such as data entry, report generation, and system monitoring, all of which can be conducted without real-time human input.

In contrast, attended robots need human oversight to initiate and manage their operations, as they are often designed to assist users in real-time scenarios, which eliminates their suitability for tasks that can be entirely automated without human presence. The other options, such as Azure robots and API robots, refer to specific technologies or integration methods rather than defining the operational characteristics of robot types in the context of RPA. Therefore, the distinguishing factor for unattended robots is their capacity to run completely independently of human engagement, which is why they are the correct answer to the question.