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Showing posts with label important objectives of system software and operating system. Show all posts
Showing posts with label important objectives of system software and operating system. Show all posts

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