A turn-oriented thread and/or process synchronization facility obtains a ticket value from a monotonically increasing ticket counter and waits until a memory location contains a value equal to the ticket value, yielding the processor between polls of…

过程同步.数据同步. In computer science, synchronization refers to one of two distinct but related concepts: synchronization of processes, and synchronization of data. Process synchronization refers to the idea that multiple processes are to join up or handsh…

1. Multiprogramming system provide an environment in which the various resources (like CPU,memory,and peripheral devices) are utilized effectively,but they do not provide for user interaction with the computer system. 2. Time sharing(or multitasking)…

六.两个重要的概念性问题: 1.同步:要保持数据的一致性,就需要一种保证并发进程正确执行顺序的机制.这种机制就是 进程同步(Process Synchronization). 竞争资源的多个进程按着特定的顺序执行,目的是使并发执行的进程之间能有效的共享资源和相互合作,从而使程序的执行具有可再现性.(广义) 异步环境下的一组并发进程,因直接制约而互相发送消息而进行相互合作.互相等待,使得各进程按一定的速度执行的过程称为进程间的同步--张尧学 <计算机操作系统教程>(狭义) 2.线程池:根据系统的…

转载自:http://placement.freshersworld.com/power-preparation/technical-interview-preparation/os-interview-questions-23351 1. What is an operating system? An operating system is a program that acts as an intermediary between the user and the computer hard…

w https://en.wikipedia.org/wiki/Remote_procedure_call In distributed computing a remote procedure call (RPC) is when a computer program causes a procedure (subroutine) to execute in another address space (commonly on another computer on a shared netw…

1. What is the race condition in verilog? Ans :The situation when two expressions are allowed to execute at same instance of time without mentioning the order of execution. 2. List the levels of abstraction in verilog? Ans : 1. Behavioral level 2. Re…

Spring的bean默认都是单例的,这些单例Bean在多线程程序下如何保证线程安全呢?例如对于Web应用来说,Web容器对于每个用户请求都创建一个单独的Sevlet线程来处理请求,引入Spring框架之后,每个Action都是单例的,那么对于Spring托管的单例Service Bean,如何保证其安全呢?本文介绍了以上的安全问题. Spring的原型Bean与单例Bean的设置 spring单例Bean 在spring中的Bean缺省的情况下是单例模式的,在spring容器中分配Bean的时…

Microsoft Sync Frameworks简称MSF,是一个综合的同步平台,MSF支持应用程序,服务,设备的在线以及离线同步.MSF主要有以下几个部件组成:     * Sync Services for ADO.NET: 同步ADO.NET的数据     * Sync Services for FeedSync: 同步 RSS 和 ATOM 种子     * Sync Services for File Systems: 同步文件和文件夹     * Sync Framework Co…

refer to http://www.programmerinterview.com/index.php/operating-systems/thread-vs-process/ A process is an executing instance of an application. What does that mean? Well, for example, when you double-click the Microsoft Word icon, you start a proces…