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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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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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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CS 2203: Operating Systems Centre for Advance Studies in Engineering (CASE) Hand-out 8: Lab 08 Instructions March 2014 Computer Science Department Instructor: Shehreyar Rashid Lab 8: Introduction to Java and Sockets Objectives Write‚ compile‚ and execute Java programs in Linux using command line. Use an IDE to write‚ compile‚ and execute Java programs in Linux. Learn to write client-server application using Sockets. Credits: This lab uses material from Silberschatz‚ Galvin
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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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Shortest Job First algorithm with Non-Preemption Description: Initially‚ In the shortest job first algorithm with non-preemption‚ the sorting of the process can be done based on their burst time in ascending order. The above algorithm calculates the averaging waiting time and turn around time of each process . ALGORITHM: 1) start 2) read the number of process into n 3) for i=0 to n step1 do a) read the burst time of process into b[i] b) check if b[i] is less than 0 i. write invalid input
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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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Practical – 1 Chalk out the storyboard and design of Diary Food Limited. As the name reflects your site Dairy Products and aims at opening on online store. Your storyboard should cover all the features that you plan to have on the site. Design of online dairy products Online shopping Welcome to Online Store List of dairy Products Products Rates Milk 20Rs./Kg Curd 20Rs./Kg
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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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the car y. What is the distance between the points A and C? a)120 km b) 150 km c) 80 km d) 70 km 6. Gayatri Books and Binding works prepares 24 cm ´ 24 cm drawing sheets. Ramu‚ a worker in the unit is supposed to pack less than 250 sheets per hour into bundles. If he packs 6 sheets less per bundle‚ then he can pack 12 bundles more per hour. Find the number of sheets he packs per hour‚ if he packs at least 15 bundles per hour. a)224 b) 204 c) 228 d) 214 7. Four digit numbers are formed using the digits
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