Time-Triggered Protocols - Real-time Systems MCQs

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1. What is the main purpose of time-triggered protocols in real-time systems?
(A) To reduce CPU idle time
(B) To provide deterministic communication by transmitting messages at predefined time slots
(C) To transfer files in batch mode
(D) To ignore task priorities

2. Which of the following is a commonly used time-triggered protocol?
(A) Time-Triggered Ethernet (TTE)
(B) TCP/IP exclusively
(C) HTTP only
(D) Wi-Fi

3. Time-triggered protocols are mainly used in:
(A) Batch processing only
(B) Desktop office applications only
(C) Multimedia streaming exclusively
(D) Safety-critical and hard real-time systems

4. Which feature distinguishes time-triggered protocols from event-triggered protocols?
(A) Messages are sent randomly
(B) Messages are sent at pre-scheduled times rather than on events
(C) Messages are sent only when CPU is idle
(D) Messages are batch transmitted exclusively

5. In time-triggered protocols, the timing of messages is:
(A) CPU idle dependent
(B) Random
(C) Deterministic and predictable
(D) Batch file dependent

6. Which of the following is an advantage of time-triggered protocols?
(A) Reduces CPU usage only
(B) Ensures predictable latency and avoids priority inversion
(C) Randomly schedules messages
(D) Disk-based batch transfer

7. Time-triggered protocols often use:
(A) Global synchronized clocks across nodes
(B) Random local clocks
(C) CPU idle timers only
(D) Batch processing exclusively

8. Which of the following is a challenge in implementing time-triggered protocols?
(A) Measuring CPU idle exclusively
(B) Maintaining accurate clock synchronization among nodes
(C) Disk scheduling
(D) Memory fragmentation

9. FlexRay is an example of:
(A) Batch file transfer
(B) Standard Ethernet only
(C) Wi-Fi exclusively
(D) Time-triggered protocol for automotive networks

10. Time-triggered protocols help prevent:
(A) Memory leaks only
(B) Message collisions and timing unpredictability
(C) Disk fragmentation exclusively
(D) CPU overheating

11. In TTE, communication is organized into:
(A) Batch file transfers
(B) Random message bursts
(C) CPU idle cycles
(D) Communication rounds with predefined time slots

12. Which is a key requirement for time-triggered systems?
(A) Disk-based message delivery
(B) Randomized task scheduling
(C) Batch processing exclusively
(D) Synchronized clocks across all nodes

13. Time-triggered protocols are ideal for:
(A) Background desktop tasks exclusively
(B) Soft real-time multimedia only
(C) Hard real-time and safety-critical systems
(D) Batch file systems

14. Which of the following is TRUE about time-triggered communication?
(A) It is random and unpredictable
(B) It is predictable, repeatable, and avoids contention
(C) It reduces memory automatically
(D) It depends on disk usage

15. Compared to event-triggered protocols, time-triggered protocols:
(A) Offer deterministic timing at the cost of lower bandwidth efficiency
(B) Always use maximum bandwidth
(C) Are completely random
(D) Ignore task priorities

16. In a time-triggered system, message transmission follows:
(A) Disk usage cycles only
(B) Random on-demand events
(C) CPU idle detection
(D) A global schedule determined offline

17. Which real-time network standard is based on the time-triggered concept?
(A) Wi-Fi exclusively
(B) Ethernet TCP/IP only
(C) TTP/C (Time-Triggered Protocol for Controller Area Networks)
(D) USB

18. Time-triggered protocols improve system reliability by:
(A) Disk-based batch processing only
(B) Randomizing task execution
(C) Reducing memory usage exclusively
(D) Avoiding message collisions and providing fault-tolerant scheduling

19. The main disadvantage of time-triggered protocols is:
(A) Reduced flexibility for handling sporadic or unexpected events
(B) CPU overload only
(C) Increased memory usage exclusively
(D) Disk fragmentation

20. The main benefit of time-triggered protocols in real-time systems is:
(A) Deterministic and predictable communication for safety-critical applications
(B) Reduces CPU idle automatically
(C) Batch file transfer exclusively
(D) Memory optimization

Time-Triggered Protocols – Real-time Systems MCQs

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