RTOS Architecture – Real-time Systems MCQs

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1. What is the main function of a Real-Time Operating System (RTOS)?
(A) To maximize CPU idle time
(B) To execute tasks with predictable timing and guarantee deadlines
(C) To handle only batch jobs
(D) To ignore task priorities

2. Which of the following is a key component of RTOS architecture?
(A) Web server
(B) Disk defragmenter
(C) Task scheduler
(D) File explorer

3. In RTOS, the scheduler is responsible for:
(A) Increasing CPU idle time
(B) Allocating memory only
(C) Determining the order in which tasks execute
(D) Handling user input only

4. RTOS architecture can be broadly classified into:
(A) Windows, Linux, and Mac architectures
(B) Monolithic, microkernel, and layered architectures
(C) Batch, interactive, and desktop architectures
(D) Cloud-based only

5. In a monolithic RTOS architecture, most services:
(A) Are executed randomly
(B) Are distributed over multiple processors
(C) Run in a single address space for efficiency
(D) Ignore task priorities

6. A microkernel RTOS architecture is designed to:
(A) Ignore periodic tasks
(B) Execute tasks sequentially only
(C) Keep only essential services in kernel space and move others to user space
(D) Handle batch jobs only

7. Layered RTOS architecture provides:
(A) No task scheduling
(B) Maximum CPU idle time
(C) Random task execution
(D) Modularity and easier system maintenance

8. Which RTOS component manages inter-task communication?
(A) Memory allocator only
(B) Disk scheduler
(C) IPC (Inter-Process Communication) module
(D) File system

9. Task management in RTOS includes:
(A) CPU idle time only
(B) Task creation, deletion, suspension, and resumption
(C) Disk I/O scheduling
(D) Network packet handling only

10. In RTOS, the kernel provides:
(A) File editing only
(B) Web browsing
(C) Fundamental services like scheduling, synchronization, and communication
(D) Multimedia playback

11. Preemptive scheduling in RTOS allows:
(A) Infinite CPU idle time
(B) Only sequential task execution
(C) Ignoring deadlines
(D) Higher-priority tasks to interrupt lower-priority tasks

12. Non-preemptive RTOS scheduling means:
(A) Tasks can be interrupted by higher-priority tasks
(B) Tasks run to completion once started without interruption
(C) All tasks are aperiodic
(D) CPU is always idle

13. Which component handles timing and clocks in RTOS?
(A) Disk scheduler
(B) Timer or clock management module
(C) Memory allocator only
(D) Task communication only

14. RTOS architecture ensures:
(A) Maximum disk usage
(B) Random task execution
(C) Deterministic and predictable task execution
(D) Ignoring deadlines

15. Interrupt handling in RTOS is important because:
(A) It allows the system to respond to external events quickly
(B) It delays task execution
(C) It increases task WCET only
(D) It ignores deadlines

16. Which RTOS architecture is most suitable for safety-critical systems?
(A) Batch-only
(B) Monolithic
(C) Microkernel
(D) Desktop OS

17. Memory management in RTOS is required to:
(A) Allocate and protect memory for tasks and system services
(B) Only execute periodic tasks
(C) Ignore task priorities
(D) Increase CPU idle time

18. The main advantage of a microkernel RTOS is:
(A) Random task execution
(B) Increased WCET
(C) Better reliability and modularity
(D) Ignored deadlines

19. Which RTOS service allows tasks to communicate and synchronize?
(A) IPC and synchronization primitives
(B) File system only
(C) Disk scheduling
(D) CPU idle management

20. The RTOS kernel is responsible for:
(A) Web server tasks
(B) Disk defragmentation
(C) Scheduling, communication, synchronization, and interrupt handling
(D) Multimedia playback only