Definition of Operating System: An Operating system is a program that controls the execution of application programs and acts as an interface between the user of a computer and the computer hardware. Need of an operating system: When a program written in a high level language is executed by a computer‚ the following steps are followed… The compiler to translate the program is loaded in the memory. The source program is read and loaded in the memory. The source program is compiled into object program
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Introduction………………………………………………………………………………….....3 ➢ Overview of Operating System ➢ Components and functions of operating systems………………………….........4-5 ➢ Different versions of Windows…...………………………………………………....6 ➢ Installation of Windows Operating Systems ➢ Procedures to install Windows………………………………………………………7 ➢ Methods of supporting operating systems………………...……………………...8 ➢ Possible concerns when installing and maintaining operating systems………..8 ➢ Troubleshooting
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its lifetime. Operating system takes care of selecting the processes from these queues in some fashion. Selecting process is done by the the appropriate scheduler. Types of scheduling: Short - term (or) CPU Scheduler Medium – term Long – term (or) Job Scheduler Short – Term Scheduler: Short term scheduler selects the processes that are ready to execute and allocates CPU to one of them. Medium – Term Scheduler: Medium term scheduler is introduced by some operating systems such as time sharing
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compute how long it will take to satisfy the following requests: 4‚ 40‚ 11‚ 35‚ 7‚ and 14 Using the LOOK policy All request are present in the wait queue Ignore rotational time and transfer time; just consider seek time 1. How does the result compare with Fig. 7.16? START FINISH TRAVELED 5 10 15 20 25 30 35 40 15 14 1 X
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What are the two differences between user-level and kernel-level threads? Under what circumstances is one type is better than other? Answer: 1- User-level threads are unknown by the kernel‚ whereas the kernel is aware of kernel threads. 2- On systems using either M: 1 or M: N mapping‚ user threads are scheduled by the thread library and the kernel schedules kernel threads. 3- Kernel threads need not be associated with a process whereas every user thread belongs to a process. Kernel threads are
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Contact Us OUTPUT [pic] Practical – 2 Create your own page with your favorite hobbies. Hobby Page My Favourite Hobbies are:- Playing Basketball Playing Badminton Reading Books Listening Music Surfing Internet Working on Computer OUTPUT [pic] Practical – 3 Create a menu or table of content web page. Each menu item or section of the table of content should load a different web page. HOME PAGE HOME Online store RESTAURANT & BAKERY HOME MENU SPECIALS
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and can be done by users who only know DOS commands. An example of a well known batch file is the autoexec.bat‚ which is a simple batch file loaded each time the computer is loaded on MS-DOS and early Windows computers. This batch file contained all the necessary commands and programs used to run MS-DOS and Windows each time the computer booted. Use your VMware accounts to do this lab sheet because you will need to save your work. Next page please. Exercise 1 – Create your first batch file
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Guide to UNIX Using Linux Fourth Edition Chapter 5 Solutions Answers to the Chapter 5 Review Questions 1. You have just finished a 25-page paper that you have written using Emacs. The file containing the paper is called /assignments/data_sources. After your instructor has briefly looked at the paper‚ she recommends that you change all instances of the reference “data is” to “data are” before you submit it. Which of the following commands can you use to locate these references in the
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CVE listing is a dictionary of publicly known information security vulnerabilities and exposures. IT is hosted by the Office of Cybersecurity and Communications at the U.S. Department of Homeland Security 5. Can Zenmap GUI detect which operating systems are present on IP servers and workstations? Which option includes that scan? Yes‚ the OS detection using TCP/IP stack fingerprinting option includes that scan. 6. If you have scanned a live host and detected that it is running Windows
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Review Questions 4.1 Table 3.5 lists typical elements found in a process control block for an unthreaded OS. Of these‚ which should belong to a thread control block and which should belong to a Process control block for a multithreaded system? Identifiers will appear in both thread and process control blocks‚ because both need to be identified. Processor State Information should belongs to process control block. Kernel will only interact with process not threads. Process Control Information:
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