Real-time Networks – Real-time Systems MCQs

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1. What is the main purpose of a real-time network?
(A) To reduce memory usage
(B) To maximize CPU idle time
(C) To ensure timely and deterministic communication between distributed real-time systems
(D) To ignore task priorities

2. Which of the following is a key characteristic of real-time networks?
(A) CPU temperature monitoring
(B) High disk usage only
(C) Batch data transfer
(D) Low latency and predictable message delivery

3. Which protocol is commonly used in real-time Ethernet networks?
(A) TCP/IP only
(B) Time-Triggered Ethernet (TTE)
(C) HTTP exclusively
(D) FTP only

4. CAN (Controller Area Network) is widely used in:
(A) File servers exclusively
(B) Desktop applications only
(C) Automotive and industrial control systems
(D) Web browsing

5. Which of the following ensures deterministic message delivery in real-time networks?
(A) Batch file transfer
(B) Random packet delivery
(C) Priority-based or time-triggered scheduling
(D) CPU idle scheduling

6. In real-time networks, jitter refers to:
(A) Memory fragmentation
(B) CPU temperature fluctuations
(C) Variation in message transmission time
(D) Disk access delays

7. Which network type supports hard real-time communication?
(A) Bluetooth only
(B) Standard Ethernet only
(C) Wi-Fi exclusively
(D) Time-Triggered Networks (TTN)

8. Real-time networks are critical in:
(A) Batch file processing exclusively
(B) Desktop office applications
(C) Video streaming only
(D) Aerospace, automotive, and industrial automation

9. Which CAN protocol feature ensures message priority handling?
(A) Disk scheduling only
(B) Message arbitration based on identifier
(C) CPU idle management
(D) Batch processing

10. Ethernet-based real-time communication requires:
(A) Batch transfer of files only
(B) Random packet transmission
(C) Deterministic scheduling and low-latency switches
(D) CPU idle monitoring exclusively

11. Which of the following is a challenge in real-time networks?
(A) CPU temperature fluctuations only
(B) Disk allocation exclusively
(C) Memory fragmentation only
(D) Meeting strict timing constraints under network congestion

12. In real-time networks, deadline miss can occur due to:
(A) Network delays or congestion
(B) CPU idle time only
(C) Task names
(D) Disk fragmentation

13. Which network protocol supports both time-triggered and event-triggered communication?
(A) Bluetooth
(B) HTTP only
(C) FTP exclusively
(D) FlexRay

14. Which of the following is a benefit of real-time networking?
(A) Batch processing only
(B) Reduces CPU temperature automatically
(C) Reduces memory usage exclusively
(D) Predictable and reliable communication between distributed systems

15. Which factor affects timing predictability in real-time networks?
(A) Memory fragmentation exclusively
(B) Task name length only
(C) Disk scheduling
(D) Network load and message priority

16. Time-Triggered Ethernet achieves determinism by:
(A) Using batch file transfers
(B) Randomly sending packets
(C) Transmitting messages at predefined time slots
(D) CPU idle monitoring only

17. Which type of real-time network is suitable for safety-critical systems?
(A) Batch file networks
(B) Standard Ethernet only
(C) Wi-Fi exclusively
(D) Hard real-time networks with deterministic behavior

18. Real-time network design must consider:
(A) Memory allocation exclusively
(B) Disk usage only
(C) Latency, jitter, bandwidth, and fault tolerance
(D) CPU idle time only

19. CAN bus ensures real-time communication using:
(A) Batch transfers
(B) Disk scheduling exclusively
(C) CPU idle monitoring
(D) Priority-based arbitration

20. The main goal of real-time networks is:
(A) Reduce memory usage exclusively
(B) Reliable and deterministic data transfer to meet timing constraints
(C) Batch file transfer only
(D) Increase CPU idle time