8. Which of the following statement regarding memory is incorrect? (A) When the processor attempts to read a byte or word, it will first check with the cache memory. (B) The main memory is usually large and slow. (C) The cache size has impacts on performance of the processor. (D) As the cache block size increases, the hit ratio will decrease. (E) None of the above. 9. Which of the following technique is not used for I/O operations? (A) Programmed IO (B Interrupt-driven IVO (C) Direct Memory Access (D) Peripheral polling I/O (E) None of the above 10. Which of the following defines the system call interface to operating systems and hardware resources? (A) ABI (B) ISA (C) API (D) HLL (E) None of the above 11. The error-correction techniques in RAID disks uses the method of (A) spatial redundancy (B) temporal redundancy (C) information redundancy (D) physical redundancy (E) All of the above 12. A copy of an application's state saved in some storage to be immune to the future failure is called (A) process isolation (B) virtual machine (C) checkpoints (D) concurrency control (E) None of the above 13. In Android operating systems, the installation and removal of an app is handled by (A) Activity Manager (B) Resource Manager (C) Package Manager (D) Content Providers (E) None of the above 14. In a five-state model, if a process control block is created, but the process has not loaded into the main memory, this process is in the state of (A) Running (B) Ready (C) Blocked (D) New (E) Exit