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April 28, 2013

Important Objective Of System Software And Operating System

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51-The field that contains a segment index or an internal index is called-Target Datum
52-A program in execution is called-Process
53-Jobs which are admitted to the system for processing is called-Long-Term Scheduling
54-A set of techniques that allow to execute a program which is not entirely in memory is called-Virtual memory
55-SSTF stands for-Shortest-Seek-time-first scheduling
56-Before proceeding with its execution, each process must acquire all the resources it needs is called-Hold and Wait
57-Virtual memory is-used in all major commercial operating systems
58-Relocation bits used by relocating loader are specified by-Assembler or Translator
59-Resolution of externally defined symbols is performed by-Linker
60-Relocatable programs-can be loaded almost anywhere in memory
61-Page stealing-is taking page frames other working sets
62-The total time to prepare a disk drive mechanism for a block of data to be read from is its-latency plus seek time
63-To avoid race condition, the maximum number of processes that may be simultaneously inside the critical section is-one
64-The memory allocation scheme subject to “external” fragmentation is-segmentation
65-Page fault frequency in an operating system is reduced when the locality of reference is applicable to the process
66-In which of the following page replacement policies Balady’s anomaly occurs?- FIFO
67-Virtual memory can be implemented with-Segmentation &  Paging
68-Recognition of basic syntactic constructs through reductions, this task is performed by-Syntax analysis
69-A grammar for a programming language is a formal description of-Structure
70-Swapping - is a technique of temporarily removing inactive programs from the memory of computer system
71-Ageing-is a technique of improving the priority of process waiting in Queue for CPU allocation
72-Latency Time-is the time required by a sector to reach below read/write head.
73-Which of the following is most general phase structured grammar? Context – Sensitive
74-File record length-Should be chosen to match the data characteristics.
75-A public key encryption system-Allows only the correct receiver to decode the data

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