# SCADA engineer interview question?

**URL:** <https://forumautomation.com/t/scada-engineer-interview-question/484>\
**Category:** Industrial Automation\
**Created:** [August 23, 2015, 11:51pm UTC](https://forumautomation.com/t/scada-engineer-interview-question/484 "2015-08-23T23:51:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![denizen](https://forumautomation.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@denizen](https://forumautomation.com/u/denizen)\
**Post date:** [August 23, 2015, 11:51pm UTC](https://forumautomation.com/t/scada-engineer-interview-question/484/1 "2015-08-23T23:51:14Z")

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**SCADA programmer interview questions**

1. What is the full form of SCADA ?

Supervisory control and Data Acquisition

2.What are the common system components of SCADA system ?

Remote terminal units PLC Telemetry system Data acquisition server  
HMI Historian software Supervisory system Communication infrastructure Process and analytical instrumentation

3.What is RTU?

Full form of RTU is remote terminal unit . Remote terminal units connects sensors in the process control and convert sensor signal to digital data.

4.Brief about SCADA architecture ?

5.Different communication protocols used in SCADA communication ?

Ethernet Modbus VSAT

6.Major SCADA manufactures and their software name ?

7.What is OPC?

> [@Interview Question : What is OPC? Basic concept of OPC (OLE for process control )](https://forumautomation.com/t/interview-question-what-is-opc-basic-concept-of-opc-ole-for-process-control/301):
>
> What is OPC (OLE for Process control )? OPC is an industry standard created in collaboration of a number of worldwide leading automation hardware and software manufacturing in cooperation with Microsoft.The standard creates common interface for communication between various devices controlling technological process. The objective is to prevent the given monitoring or control software from being dependent on the hardware manufacturer .OPC is based on OLE/DCOM/COM technology of Microsoft. OPC ser…

8.Basics of Modbus communication ?

9.Different types of modbus communication ?

10.Brief about Ethernet communication ?

11.What is a switch ?

12.What is subnet masking ?

13.What is TCP/IP protocol?

14.In server client architecture who is the data owner ?

Server is the data owner. Client request for Data and server respond to request

15.In Master - Slave architecture who is the data owner ?

Slave. Master request for data and slave provide data .

16.What are the disadvantages of SCADA comparing to DCS?

Search on [forumautomation.com](http://forumautomation.com) for more information

1. Advantages of SCADA system

2. what is VSAT ?

3. Common SCADA programming languages ?

20.Compare SCADA and DCS