17. Which of the following memory organization schemes can cause the external fragmentation? A. Pure paging B. Paging C. Demand Paging D. Segmentation Answer: 18. When the system is thrashing, the effective actions are as follows: I. Cancel partial processes. II. Increase the capacity of disk swap. III. Increase the priority of user processes. A. I only B. II only C. III only D. I, II only Answer: 19. Which of the followings could not be the definition of the process? A. An execution of the program B. program +data+ PCB C. A sequence of instructions D. Basic unit for resource allocation and scheduling. Answer: 20. Which of the following algorithms has Belady's anomaly behavior? A. LRU B. LFU C. MFU D. FIFO