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QUESTION 20 What is the cause of thrashing (excessive swapping in and and out) in a single-CPU, single-core system? Too many ready processes. Poorly implemented
QUESTION 20 What is the cause of thrashing (excessive swapping in and and out) in a single-CPU, single-core system? Too many ready processes. Poorly implemented page table. Too many running processes. Insufficient disk throughput. QUESTION 21 A large file is copied in small blocks of a fixed size. How does doubling the block size affect the total copy time? Does not affect the copy time Somewhat reduces the copy time. Somewhat increases the copy time. QUESTION 22 How many disk operations (reads and possibly writes) does it take to open the file "foobar.txt" for reading? Assume that no disk information has been previously cached, each directory access requires one read operation, and the data buffer content is not prefetched. 2
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