Operating system is a system software that is manages a computer hardware and a computer software provides resources and a common service of computer programs.
Operating system provides all computer program and other devise including firmware to perform any function. Time sharing is an operating system that perform schedule task for used the system this may include various types of software such as accounting software that is used for the cost allocation time of processor mass storage printing and other resources.
Computer Hardware function inputs and outputs and memory allocations operating system acts between computer program and computer hardware these applications code usually executed directly the computer hardware and frequently makes a systems call to operating system functions or interrupted it.
Operating system are used on many
…show more content…
In system call computer programming interface servive providers the operating system they can written the high level language such as c and c++Many systems now include both CLI and GUI interfaces System calls can differ from platform to platform
The operating system can provides new versions of a system call with the enhanced features there are differents types of system call
Process control File management Device management Information maintenance Communications Protection
In operating system a process with two or more threads threads of execution, running on one processor.they can be the tw types of threads one of the user side threads and other of the kernel side threads
User side threads management done by userlevel threads library and the kernel sides threads supports only kernel side Solaris Lightweight processes is an example of kernal threads its consist three threads models these model are one to many model one to one and many to many model these model very useful to
‘Chubby’ is a unified lock service created by Google to synchronize client activity with loosely coupled distributed systems. The principle objective of Chubby is to provide reliability and availability where as providing performance and storage capacity are considered to be optional goals. Before Chubby Google was using ad-hoc for elections, Chubby improved the availability of systems and reduced manual assistance at the time of failure. Chubby cells usually consist of chubby files, directories and servers, which are also known as replicas. These replicas to select the master use a consensus protocol.
section{Evaluation} label{sec-analyze} vspace{-0.08in} We evaluate Tarax with the six popular server applications described above. We first perform experiments to compare the performance and code sizes of the Tarax-optimized kernels and the vanilla kernel. We then perform dynamic profiling on the kernels to collect detailed statistics on instruction cache misses and branches. Finally, we switch on specific GCC optimizations with and without profile feedback, respectively, to collect performance numbers.
What are the two other main thread libraries apart from the PThread library? Answer: The two thread libraries which is involved in the process are 1 .Java thread 2 .Window thread 22. What are the three common models for mapping a user level thread to an operating system kernel thread? Answer: We have different models of threads used for mapping.
What is the difference between a stack and a queue? Where would an operating system use each of these data structures? Answer: Stack: It uses FILO method means First in Last out 1.
In 4th chapter I learned about CPU and other aspects related to it such as RISC and CISC.CPU stands for central processing unit and it is very suitable name for it as it processes the instructions that it gathers from files. Following diagrams explain the basic architecture of CPU: CPU performance is given by the fundamental law: Thus, CPU performance is dependent upon Instruction Count, CPI (Cycles per instruction) and Clock cycle time. And all three are affected by the instruction set architecture. Instruction Count CPI Clock Program x Compiler x x Instruction Set Architecture x x x Microarchitecture
What is a thread? What resources does it share with other threads in the same process? A thread commonly referred to as a light weight process, is a portion of a process that can be scheduled and executed independently by the operating system. A thread shares primary storage, files, memory, and input/output devices all from their parent processes. 10.
There are many operating systems but I am not listing all of them. One operating system is Windows, made by Microsoft. Another operating system is Mac, made by Apple. And one operating system you most likely don 't know is Linux, Linux is an open source operating system and it is the fastest, tho you probably don 't and will never use it. An open-source operating system is an operating system that you can edit like Windows is not an open source operating system so you can’t edit it, but in Linux, you can edit its operating system.
There is several different types of components that enable the internet and help the web function correctly upon your computer. A few of these things are; Uploading and FTP, Web Servers, network routers, proxy servers, ISPs, Web Hosting Services, and Domains. I will be explaining all of these components in as much detail as possible. Uploading
P2 Explain the purpose of operating systems Without an operating system the computer cannot function. An operating system is described as the system software that represents the essential layer between the BIOS and the applications software such as word processor, presentation, database etc. Operating system manages use of the system’s hardware and software such as time sharing and multi-tasking. It provides a consistent way for applications to interact with the hardware and for users to interact with the software and hardware. Operating system is important because it allows the computer to serve a variety of tasks instead of just one.
11. What is Linux, what makes it different from proprietary software such as Microsoft and what is the advantage of Linux? Linux is a family of open-source operating systems. It is different from proprietary software like Windows because it can be modified and distributed by anyone around the world instead of just by the company that owns it.
c. It is a process in which many different process are able to access same information. d. It is a process in which two different processes run simultaneously. 12. Which of following packages contain all the built in exceptions in java? a. java.lang b. java.net
If there are so many programs, and the resources are limited, this software called (kernel) also decides when and how long a program should run. It is also called scheduling. It might be very complex to access the hardware directly, since there’re so many different hardware designs for the same type of components. Usually kernels implement somehow level of hardware abstraction to hide the underlying complexity from applications and provide a uniform interface. This also helps application developers to develop
TELE 5330 – DATA NETWORKING ASSIGNMENT #2 Name: Prashanth Reddy Edunuri Grade (1) Most applications that use peer-to-peer communication also employs client server communication for some portion of functionality as decentralized peer-to-peer networks have numerous compensations over old-fashioned client-server networks. This system endorsed files to be questioned and shared between users, devoid of a central directory, and as a result shielded the network from lawful issues of individual users. By decentralizing resources, P2P networks have been able to virtually exclude expenses allied with a centralized infrastructure.
Describe different types of business documents that may be produced and the format to be followed for each. There are many different types of business documents that are used daily in business environments, for example; Emails- The fastest way to send documents and information and follow the format of recipient and subject. Spreadsheets- These are used to store information electronically.
Unit 2 discussion Assignment Using one of the referenced website articles discuss how OS creates the illusion of virtualization by virtualizing the CPU. By running one process, then stopping it and running another, and so forth, the OS can promote the illusion that many virtual CPUs exist when in fact there is only one physical CPU (or a few). last week we learn and discussed about one of basic and fundamental concepts and what about of the operating system and in generally how it 's working and it 's own component that related to complete the work as a group like a team. from this perspective, I would use one of the reference website articles that given for this week and introduced to the concepts of operating systems and discuss one of the most fundamental abstraction that the operating system provides to us to use .