Operating Systems-4

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4. Consider the following statements with respect to user-level threads and kernel supported threads
i. context switch is faster with kernel-supported threads
ii. for user-level threads, a system call can block the entire process
iii. Kernel supported threads can be scheduled independently
iv. User level threads are transparent to the kernel
Which of the above statements are true?

1. (ii), (iii) and (iv) only
2. (ii) and (iii) only
3. (i) and (iii) only
4. (i) and (ii) only

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