The Purpose of an Operating System Professor John St. John COMP 129 – PC Hardware and Software October 2‚ 2014 Some professionals in the Information Technology (IT) field might describe the Operating System (OS) of a Personal Computer (PC) as its software brain. Jean Andrews‚ Ph.D.‚ describes an OS this way: “An operating system is software that controls a computer. It manages hardware‚ runs applications‚ provides an interface for users‚ and stores‚
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Developing and maintaining your relationship with God requires time‚ effort and desire for closeness. Just like with the other people‚ we need to work out and put every effort in maintaining our relation with them. If we really desire to develop and maintain our relation with God‚ we would definitely acquire the greatest happiness and blessings in our life. Our lives will never get lost and will keep on the right track. Take time to develop your relationship with God and reap all the rewards it brings
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their operating systems. Just like a PC can run different operating systems (like Windows‚ Linux‚ BSD etc.) or different versions of the same operating system (like Windows XP‚ Windows Vista‚ Windows 7 etc.)‚ most smartphones can also run different versions of the operating system they were made for and in exceptional cases‚ they might even be able to run operating systems they weren’t made for. They can be classified in the following manner. 1. Manufacturer-built proprietary operating systems •
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Advait 1. If following equations? A) b) c) d) Aptitude Test TCS-1 Awareness Development Initiative is a root of which of the ‚ where b is a rational number‚ then 2. From the top of a tower of height 180 m the angles of depression of two objects on either sides of the tower are 30° and 45°. Find the distance between the two objects. a) b) c) d) 3. A amount of 20‚900 is taken as loan at 9% p.a.‚ compound interest. If it is to be repaid in 2 equal annual instalments‚ what is the value of
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turn around time can be calculated by using the above algorithm. ALGORITHM: 1) start 2) read the no of processes to n 3) initialize i to 0 4) if ia[j] then a) swap a[i] and a[j] b) swap at[i] and at[j] c) swap b[i] and b[j] 8) from i=0 to n do a) w[i]=s-b[i]-at[i] b) s=s+a[i] c) avg=avg+w[i] 9)tt=tt+avg 10) tt=tt/n 11) avg=avg/n 12)write the turn around time and average waiting time 13) stop 2) AIM: To write a program on Shortest Job First algorithm with Non-Preemption Description:
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STUDENT’S MANUAL TO ACCOMPANY OPERATING SYSTEM CONCEPTS SEVENTH EDITION ABRAHAM SILBERSCHATZ Yale University PETER BAER GALVIN Corporate Technologies GREG GAGNE Westminster College Preface This volume is a student’s manual for the Seventh Edition of Operating System Concepts‚ by Abraham Silberschatz‚ Peter Baer Galvin‚ and Greg Gagne. It consists of answers to the exercises in the parent text. Although we have tried to produce a student’s manual that will aid all of the users
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File Systems The file system provides the environment for working with files and folders. Windows uses FAT12‚ FAT16‚ FAT32 and/or NTFS with NTFS almost always being the best choice. Linux also has a number of its own native file systems. The default file system for Linux used to be ext2‚ now it is typically ext3. MS-DOS used to be and Microsoft Windows continues to be the most popular operating system for 80386‚ 80486‚ and Pentium PCs. Because Linux started on 80386/80486 PCs‚ a connection
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precisely defined by any but God. How much do you love your spouse? 1. You are 90 years of age‚ and your son comes home from abroad with a gift of car for you with full air conditioner – he may be claiming you on “life” in the mortuary. Your breakthroughs must manifest now! 2. Unfaithfulness in keeping of an appointment is an act of clear dishonesty; you may as well borrow a person’s money as his time. - Horace Manni. 3. There is influential power in gentle words. A word gently spoken
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CORPORATE SYSTEMS MANAGEMENT What is Corporate Systems Management? In order to understand this‚ we need to understand the elements within Corporate Systems Management. First thing is what is a system? A system is a set of objects together with relationships between the objects and between their attributes (Wikipedia‚ 2007). In an organisation the systems have to be organised in a systematic approach‚ allowing the system to be analysed and into the smallest elements through a top-down or bottom-
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Security 1. Multitasking Capability Many computers do just one thing at a time‚ as anyone who uses a PC or laptop can attest. Try logging onto your company’s network while opening your browser while opening a word processing program. Chances are the processor will freeze for a few seconds while it sorts out the multiple instructions. UNIX‚ on the other hand‚ lets a computer do several things at once‚ such as printing out one file while the user edits another file. This is a major feature for
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