CS 3530 Operating Systems L02 OS Intro Part 1 Dr. Ken Hoganson Chapter 1 Basic Concepts of Operating Systems Computer Systems A computer system consists of two basic types of components: • Hardware components‚ which are the electronic devices and electromechanical devices‚ such as the processors‚ memory modules‚ disk units‚ keyboard‚ screen‚ and other devices. • Software components‚ such as the application programs‚ operating system‚ utilities‚ and other programs. 3 Computer Architecture
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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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1. Computer System Components (i) Hardware Provides basic computing resources (CPU‚ memory‚ Input/output (I/O) devices). (ii) Operating System (OS) Controls and coordinates the use of the hardware among the various application programs for the various users. (iii) Applications Programs /Application Software Define the ways in which the system resources are used to solve the computing problems of the users (compilers‚ database systems‚ video games‚ business programs). (iv) Users
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Operating Systems Task 1 An operating system (OS) is a part of software which manages the operation of a computer. It controls the hardware and software of a computer‚ without it a computer would be useless. DOS Disk operating system (DOS) was released in 1981. It will load from a floppy disk each time a computer starts. DOS uses a command line interface. Command line interface can be difficult to use if you aren’t trained or experienced in using it. DOS is the predecessor to windows. DOS is
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Technology II-C Passed to: Mrs. Maryjes Calades Operating system examples As computers have progressed and developed so have the operating systems. Below is a basic list of the different operating systems and a few examples of operating systems that fall into each of the categories. Many computer operating systems will fall into more than one of the below categories. GUI - Short for Graphical User Interface‚ a GUI Operating System contains graphics and icons and is commonly navigated by
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single-processor system? * Umumnya‚ setiap situasi di mana pemungutan dihindari menggunakan multithreading‚ yang memungkinkan thread untuk memblokir daripada berkutat di beberapa kondisi. 4.4 Which of the following components of program state are shared across threads in a multithreaded process? * Heap memory dan Global variables 4.5 Can a multithreaded solution using multiple user-level threads achieve better performance on a multiprocessor system than on a single-processor system?
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Chapter no | Topic | 1 | Introduction‚ Types ‚ Computer System Overview | 2 | Operating System Structure‚ Components and Functions‚ Virtual Machine | 3 | Process Concept‚ Operation‚ Process scheduling‚ symmetric multi -processing‚ Cooperating Processes | 4 | Thread Concept‚ Thread Vs Process‚ IPC ‚kernel ‚microkernel | 5 | Scheduling‚ Types‚ Scheduling in batch‚ interactive and real-time systems (SJN‚ SJF‚ FIFO‚ LJN‚ round-robin‚ priority scheduling‚ and hybrid schemes). | 6 | Deadlock:
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different web page. HOME PAGE HOME Online store RESTAURANT & BAKERY HOME MENU SPECIALS BAKERY CONTACT US Before visit a location take a peek at all location restaurant menus & see what we have to offer for breakfast & dinner Some existing new items along with plenty of old favourites you love all made with Quality ingriendients MENU PAGE MENU Online store View Our Menu Output [pic] Practical 8 Use style sheet to modify the following:
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Chapter 7 Exercise #3 – Given a disk pack with 10 platters yielding 18 recordable surfaces… A = Rotational speed = 10ms B = Transfer rate = 0.1ms/track C = Density per track = 19‚000 bytes D = Number of records to be store = 200‚000 records E = Size of each record = 160 bytes F = Block size = 10 logical records G = Number of tracks per surface = 500 a) Number of blocks per track: (C) / (E*F) 19‚000 / (160*10) 19‚000 / 1600 11.875 11 BLOCKS b) Waste per track: C – (E*F*11)
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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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