JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV Year REAL-TIME SYSTEMS Previous Question Paper (September - 2022 - R16)
Answer any Five Questions. All Questions Carry Equal Marks.
Main
Discuss the fundamental concepts of operating systems and Linux.
What is operating system? Describe about Linux.
Answer
Linux is a Unix-like, open-source, and community-developed operating system kernel. It is distributed under the GNU General Public License (GPL), allowing users to modify and redistribute the code. Key characteristics of Linux include:
- Monolithic Kernel: The entire operating system core runs in a single address space, providing high performance.
- Multi-user and Multi-tasking: Supports multiple users and multiple processes running simultaneously.
- Portability: Can run on a wide variety of hardware architectures, from embedded systems to supercomputers.
- Security: Highly secure due to its permission-based file system and active community auditing.
Write about the kernel services in an OS.
Answer
- Process Management: Responsible for creating, scheduling, and terminating processes. It handles context switching between tasks to ensure efficient CPU utilization.
- Memory Management: Manages the allocation and deallocation of main memory (RAM) to processes. It implements virtual memory and paging to ensure processes do not interfere with each other.
- File System Management: Provides a structured way to store, retrieve, and organize data on storage devices. It manages directories, files, and permissions.
- Device Management: Uses device drivers to communicate with hardware peripherals such as disks, keyboards, and network interfaces.
- Interrupt Handling: Responds to hardware and software signals that require immediate attention, allowing the CPU to switch tasks efficiently.
- System Calls: Provides an interface through which user-level applications request services from the kernel, such as opening a file or executing a network operation.
What are the basic operating system services available? Explain how to perform memory management for a specific operating system.
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Explain task management and scheduling mechanisms.
What are the basic functions of task management module?
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Draw a task state diagram.
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How does scheduler and real time clock interrupt handler work? Explain with the help of a diagram.
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Discuss RTOS synchronization and scheduling entities.
Discuss the following: i) The Scheduler, ii) Objects, iii) Services.
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How are binary semaphores different from counting semaphores?
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Explain inter-task communication and I/O.
What are event registers and Pipe? Explain the operators performed by these.
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Explain about basic I/O Concepts.
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Explain signaling and I/O architectures.
Define a signal. What are the uses of a signal? Illustrate various signal operations available in RTOS.
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Compare Port-Mapped Vs. Memory-Mapped I/O.
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Write a short note on the following:
Real time clocks and system clocks
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Programmable interval timers.
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Provide the important features of Vx Works and explain task management functions in Vx Works RTOS.
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