Operating Systems

QUESTION 1 What is the purpose of the third parameter of the function read ? It is a pointer to a previously allocated buffer where the read bytes shall be stored It is the number of bytes that shall be read It is the number of bytes that were actually read It is a pointer to the buffer where the read bytes shall be stored. The buffer shall be allocated by read. QUESTION 2 In a system that implements user-space threads, which of the following two operations always invoke the OS process scheduler? (Check both.) Master thread termination Thread creation. mutex.wait0 A blocking system call. mutex.signal0