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______ are very effective because a mode switch is not required to switch from one thread to another.
- a)Kernel-level threads
- b)User-level threads
- c)Alterable threads
- d)Application level threads
Correct answer is option 'B'. Can you explain this answer?
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______ are very effective because a mode switch is not required to swi...
User-level threads
User-level threads are very effective because a mode switch is not required to switch from one thread to another. This means that the operating system is not involved in managing these threads, making context switches faster and more efficient.
Kernel-level threads
On the other hand, kernel-level threads require the operating system's intervention to switch between threads. This can be less efficient as it involves a mode switch, which is a more expensive operation.
Comparison
In comparison, user-level threads are lightweight and can be created and managed by the application itself without involving the operating system. This makes them faster and more efficient for multitasking and parallel processing.
Benefits
- User-level threads are easier to create and manage.
- They are more efficient for multitasking and parallel processing.
- Context switches between user-level threads are faster as they do not require mode switches.
Overall, user-level threads are very effective for certain applications where speed and efficiency are critical, as they offer a lightweight and fast way to manage multiple threads within an application.
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______ are very effective because a mode switch is not required to swi...
User-level threads
User-level threads are very effective because a mode switch is not required to switch from one thread to another. Here is a detailed explanation:
- Definition: User-level threads are managed by the application without the intervention of the operating system. They are created and scheduled by the application itself.
- Advantages: User-level threads offer several advantages, including:
- No mode switch: User-level threads do not require a mode switch from user mode to kernel mode when switching between threads. This makes the context switch faster and more efficient.
- Thread management control: The application has full control over thread management, including scheduling, synchronization, and resource allocation.
- Portability: User-level threads can be easily ported across different operating systems, as they are independent of the underlying kernel.
- Disadvantages: User-level threads also have some limitations:
- Blocking system calls: If a user-level thread performs a blocking system call, it will block the entire process, as the kernel is unaware of the individual threads.
- Limited parallelism: User-level threads may not fully utilize the available hardware resources, as the operating system schedules threads at the process level rather than at the thread level.
In conclusion, user-level threads are very effective because they eliminate the need for a mode switch and provide greater control over thread management. However, they also have some limitations that need to be considered in certain scenarios.
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______ are very effective because a mode switch is not required to switch from one thread to another.a)Kernel-level threadsb)User-level threadsc)Alterable threadsd)Application level threadsCorrect answer is option 'B'. Can you explain this answer?
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