Topic is Operating Systems

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QUESTION 11 In a symmetric multiprocessor (SMP) kernel, CA. reentrant kernel code can execute on multiple processors concurrently. B. fault tolerance involves the same issues as on a uniprocessor machine. Oc. each processor is scheduled from the pool of available processes. OD. processors share virtual memory address space and I/0 resources. check QUESTION 12 12. Assume a Linux process P with two threads of execution A and B. OA. when thread A modifies a value in its data segment, thread B can see it. OB. A and B can access the same open file if the file descriptor is visible to both. OC. If thread A calls sigsuspend() the entire process is suspended. OD. If thread P terminates by calling exit(), threads A and B immediately terminate. check QUESTION 13 If you write a C application using pthreads under Linux (i.e., KLTS) OA. thread management is done entirely by the kernel. OB. the best performance will be on single processor system. Oc. the thread library is part of glibc. OD. a scheduling switch from one thread to another requires a processor mode switch. check QUESTION 14 In a pure ULT model OA. thread switching does not require kernel privileges. OB. thread scheduling can be tailored to the application. OC. two threads can be scheduled on different processors. OD. if one thread makes a process blocking request another thread can begin executing. hack QUESTION 15 In Solaris a user-level thread (ULT) mapped to a kernel thread is called a OA. kernel thread. OB. Heavy-Weight Process (HWP) OC. Light-Weight Process (LWP) OD. None of the above check