Timeline Analysis – Real-time Systems MCQs

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1. What is the purpose of timeline analysis in real-time systems?
(A) To reduce memory usage
(B) To calculate CPU idle time only
(C) To visualize task execution and verify deadlines on a time scale
(D) To ignore task priorities

2. Timeline analysis is typically used for:
(A) File system monitoring
(B) Measuring CPU temperature
(C) Disk scheduling exclusively
(D) Understanding task scheduling and preemption behavior

3. Which type of tasks can be analyzed using timeline diagrams?
(A) Disk-only tasks
(B) Periodic, aperiodic, and sporadic tasks
(C) CPU idle cycles only
(D) Memory allocation only

4. In a timeline diagram, the horizontal axis usually represents:
(A) Time
(B) CPU idle only
(C) Task period only
(D) Memory usage

5. In a timeline diagram, the vertical axis usually represents:
(A) Memory blocks
(B) Disk I/O only
(C) Tasks or task priorities
(D) CPU temperature

6. Timeline analysis helps to identify:
(A) Task preemption, blocking, and missed deadlines
(B) Disk fragmentation
(C) Memory allocation issues exclusively
(D) CPU idle time only

7. Which scheduling algorithms are commonly visualized using timeline analysis?
(A) Batch scheduling only
(B) RMS, EDF, and Fixed-Priority Preemptive Scheduling
(C) Round-robin on desktops only
(D) FIFO queue scheduling exclusively

8. Timeline analysis is most useful in:
(A) Batch processing
(B) Soft real-time tasks only
(C) Background tasks exclusively
(D) Hard real-time systems where task timing is critical

9. Which problem can be detected using timeline diagrams?
(A) CPU idle time exclusively
(B) Deadline misses and task interference
(C) Disk scheduling delays
(D) Memory fragmentation only

10. Timeline analysis can be performed:
(A) Only by measuring CPU idle
(B) Manually or using simulation tools
(C) Only on desktops
(D) Exclusively with memory analysis tools

11. Which of the following is TRUE about timeline analysis?
(A) It allocates memory efficiently
(B) It ignores deadlines
(C) It reduces WCET automatically
(D) It provides a visual understanding of task interactions over time

12. Timeline diagrams often include:
(A) CPU temperature plots only
(B) Disk file allocations only
(C) Memory usage exclusively
(D) Task start and finish times, preemptions, and idle periods

13. Which RTOS task property is critical for timeline analysis?
(A) Memory block size
(B) Task name only
(C) Task period, WCET, deadline, and priority
(D) Disk I/O pattern only

14. Timeline analysis is particularly helpful for:
(A) Measuring CPU temperature only
(B) Validating schedulability of a given task set
(C) Reducing memory usage exclusively
(D) File system monitoring

15. In timeline diagrams, idle CPU periods are shown to:
(A) Reduce WCET automatically
(B) Ignore deadlines
(C) Visualize processor utilization and gaps between tasks
(D) Allocate memory efficiently

16. Timeline analysis complements which other real-time analysis method?
(A) Memory allocation exclusively
(B) Disk scheduling only
(C) Response time analysis and schedulability analysis
(D) Batch job completion

17. Timeline analysis can detect which type of anomalies?
(A) Batch job delays only
(B) Memory leaks only
(C) Disk fragmentation exclusively
(D) Priority inversion and unexpected preemption

18. Which visualization tool is commonly used for timeline analysis?
(A) Pie charts
(B) Gantt charts
(C) Bar graphs for memory only
(D) Histograms of CPU idle exclusively

19. Timeline analysis is particularly useful when tasks have:
(A) Unlimited CPU usage
(B) Simple non-preemptive execution only
(C) No deadlines
(D) Complex interactions and shared resources

20. The main benefit of timeline analysis is:
(A) Measuring disk usage
(B) Providing a clear visual representation of task execution to ensure deadlines are met
(C) Reducing memory automatically
(D) Increasing CPU idle time exclusively