Questions

1. Which is the component that carries out the actions on a physical process?
   1. The sensor
   2. The actuator
2. What is a device, according to the IEC 61131 standard definition?
   1. A device is defined as an independent physical entity able to implement one or more functionalities
   2. A device is a logical breakdown of a software or hardware structure
3. What is an event, according to the IEC 61131 standard definition?
   1. An event is a representation of a fact in a suitable format for the communication and elaboration by the resource
   2. An event is an occurrence of a specific condition, such as the reaching of a definite temperature

1. What is a discrete process?
   1. A process characterized by processing cycles based on single parts or individual units of a product
   2. A process involving finite quantities of the final product obtained from finite quantities of raw materials, and processed according to an ordered set of activities in a finite time interval
2. How many levels does the canonical representation of the CIM pyramid have?
3. In which level of the canonical CIM pyramid representation are the SCADA applications usually located?
4. What is the duration of a scan cycle in PLC?
   1. Less than 1 millisecond.
   2. Between 200 and 500 milliseconds.
   3. Between 100 and 500 milliseconds.
5. Which is the software layer that exposes the data of the controllers to the external systems?
6. What is store and forward in an edge device?