Advanced OPC Protocols: Test Your Knowledge with Top 25 Interview MCQ

The Advanced OPC Protocol Quiz welcomes you. The quiz challenges your knowledge of OPC (OLE for Process Control) which serves as a fundamental industrial networking standard for time-sensitive data exchange between automation systems in process industries. This quiz presents 25 multiple-choice questions which explore OPC Classic together with OPC UA content as well as the subject matter of architecture and security features with data models and communication principles. The quiz provides additional information through explanations after each question to help you learn effectively. This quiz evaluates OPC understanding at different proficiency levels for both engineering professionals and technical staff along with students. Prepare yourself to explore industrial automation technologies and connectivity features.

Industrial automation depends fundamentally on OPC (OLE for Process Control) to establish uninterrupted communication between control systems and their operational devices. This quiz consists of questions focusing on both OPC Classic and OPC UA and security models and interoperability alongside real-time data exchange principles. Answer these 25 challenging MCQs which will help you test your industrial networking skills and assess your current level of understanding. Let’s begin!

1 / 25

Which of the following best describes the OPC UA Information Model?

A set of IP addresses for devices

A hierarchical framework for organizing data and metadata

A communication protocol used for VPN tunneling

A diagnostic tool for OPC Servers

2 / 25

Why is OPC UA preferred over OPC Classic in modern industrial networks?

Supports only Windows

Provides platform-independent secure communication

Uses simpler architecture

Requires no security measures

3 / 25

How can OPC UA improve interoperability between different PLC brands?

By requiring the same hardware

Through vendor-specific configurations

By defining a common data model

By converting all data to CSV format

4 / 25

Which OPC UA feature enhances fault tolerance in a DCS environment?

Role-based access control

Redundant server configurations

Data compression

TCP-only communication

5 / 25

How does OPC UA support redundancy in industrial control systems?

By allowing multiple OPC UA Servers

By storing redundant data locally

By using proprietary backup software

It does not support redundancy

6 / 25

What advantage does OPC UA have when used in PLC-based control systems?

Requires special hardware

Ensures real-time deterministic communication

Needs Windows-based software

Only works with Siemens PLCs

7 / 25

How does OPC UA ensure seamless integration between PLCs and DCS systems?

By using proprietary protocols

Through standardized data modeling

By relying on manual data entry

Using only TCP/IP

8 / 25

How is OPC UA integrated with DCS systems?

Through direct Modbus connections

Via OPC UA Server integration

Using hardwired I/O connections

Through proprietary software only

9 / 25

What does OPC UA Discovery Service do?

Finds and lists available OPC UA Servers

Manages data compression

Secures DCOM connections

Converts XML to binary

10 / 25

How does OPC UA handle data loss prevention?

Message buffering and redundancy

Increasing server memory

Using multiple network cables

Adding more clients

11 / 25

Which transport mechanism does OPC UA Pub/Sub commonly use?

SOAP

HTTPS

UDP & MQTT

FTP

12 / 25

What is a key feature of OPC UA’s security model?

Open-source implementation

Role-based access control

Peer-to-peer communication only

No encryption

13 / 25

What is the main function of an OPC Client?

Stores data long-term

Requests and consumes data from OPC Servers

Secures network infrastructure

Controls physical devices

14 / 25

Which OPC specification is primarily used for alarms and events?

OPC DA

OPC HDA

OPC AE

OPC UA

15 / 25

What is the primary advantage of OPC UA over MQTT in industrial automation?

Lower latency

Data modeling capabilities

Lower bandwidth usage

Easier implementation

16 / 25

What does OPC UA’s Pub/Sub model enable?

Direct device-to-device communication

Client-server interactions only

Communication without OPC UA Servers

One-time data exchange

17 / 25

How does OPC UA ensure data integrity?

Message signing and encryption

TCP retransmission

Data redundancy

Periodic data backup

18 / 25

What features distinguish OPC UA from the classic version of OPC?

Uses JSON for messaging

Supports user authentication and encryption

Runs only on Windows

Eliminates the need for firewalls

19 / 25

At what OSI model layer does OPC UA function primarily?

Data Link Layer

Network Layer

Application Layer

Physical Layer

20 / 25

What component within OPC UA framework enables users to model data?

HTTP

SOAP

TCP

UDP

21 / 25

What transport protocol serves as the default implementation for OPC UA communications?

Address Space

OPC Gateway

Session Layer

Data Aggregation

22 / 25

What protocol does OPC UA mainly employ for communication?

Modbus

MQTT

TCP/IP

All of the above

23 / 25

Which additional security features does OPC UA offer beyond what OPC Classic supports?

Encryption and authentication

Plain-text communication

Open-source access

TCP-only communication

24 / 25

Which OPC standard introduced the capability for platform independence?

OPC DA

OPC HDA

OPC UA

OPC A

25 / 25

What is the fundamental reason behind using OPC systems for industrial networking?

Data storage

Real-time data exchange

File transfer

Network security

Your score is

The average score is 65%

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Advanced OPC Protocols: Test Your Knowledge with Top 25 Interview MCQ

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