8. Which of the following statement regarding memory is incorrect? (A) When the

Question

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

Explanation / Answer

SOLUTION:-

(8):- (D) As the cache block size increases, the hit ratio will decrease. - Incorrect

Reason:- Hit ratio always improves when the cache block size increase. for example- If you double the cache block size then hit ratio will be increased to 65%. Advance cache algorithm like S4LRU increases the hit ratio upto 67% and will increment in the hit ratio upto 72% when the cache size is doubled.

(9):- (E) None of the above.

Explanation:-The options A,B,C,D are used for I/O operations.

(10):- (B) ISA

Explanation:- ISA (Instruction Set Architecture) defines the system call interface to operating systems and accountable for controlling H/w resources.

(11):- (C) Information Redundancy

Explanation:- It creates storage virtualization mechanism via merging several physical disk components into 1 or more than 1 logical units in order to maintain the Information Redundancy and improved performances of RAID disks.

(12):- (C) Checkpoints

(13):- (C) Package Manager

Explanation:- Package Manager is an Application Programming Interface that controls the installation and removal of an app in Android operating system.

(14):-(D) New

Explanation:- It is a new born process which exists in New State.  

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