首页
登录
从业资格
A transaction is an action, or a series
A transaction is an action, or a series
考试题库
2022-08-02
70
问题
A transaction is an action, or a series of actions, carried out by a single user or(请作答此空), that accesses or changes the contents of the database.A transaction should possess the four basic or so-called ACID properties: Atomicity. The “all or nothing” property. A transaction is an ( )unit that is either performed in its entirety or is not performed at all. Consistency. A transaction must transform the database from one consistent state to another consistent state. Isolation. Transactions execute independently of one another. In other words, the partial effects of( )transactions should not be visible to other transactions. Durability. The effects of a successfully completed (committed)transaction are permanently recorded in the database and must not be lost because of a subsequent failure.The four properties above,only( )property is the responsibility of the concurrency control subsystem to ensure. It is the responsibility of both the( )and the application developers to ensure consistency. To guarantee the Atomicity and Durability properties after a failure, a log file is needed.A.application developerB.all usersC.application programD.DBMS
选项
A.application developer
B.all users
C.application program
D.DBMS
答案
C
解析
转载请注明原文地址:https://tihaiku.com/congyezige/2418651.html
本试题收录于:
中级 数据库系统工程师题库软件水平考试初中高级分类
中级 数据库系统工程师
软件水平考试初中高级
相关试题推荐
InClanguage,a()isaseriesofcharact
______occurswhenaseriesofsynchroni
Atransactionisanaction,oraserieso
事务(Transaction)是一个()A.程序 B.进程 C.操作序列
Atransactionisanaction,oraseries
Atransactionisanaction,oraseries
Atransactionisanaction,oraserieso
Atransactionisanaction,oraserieso
Atransactionisanaction,oraserieso
计划(Plan)、执行(Do)、()和行动(Action),简称
随机试题
W:IwasthinkingofstayinguptonighttosurftheInternet,doyouwanttojoi
—Whenshallwemeetagain?—"Makeit______dayyoulike;itisallthesameto
在结构化分析方法中,用于对功能建模的(1)描述数据在系统中流动和处理的过程,它只
若用户针对待建设的网络系统的存储子系统提出的要求是:存取速度快、可靠性最高、可进
根据下表计算,财务指标结果正确的是()。 A.留存比率为0.99 B.资
温病卫分证的脉象是A、浮紧 B、滑数 C、浮数 D、洪数 E、弦数
某海军部队有甲乙丙丁戊己庚7艘舰艇,拟组成两个编队出航,第一编队编列3艘舰艇,第
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
银行过去筹集的资金特别是存款资金由于内外因素的变化而发生不规则波动,受到冲击并引
关于建安工程定额的说法,正确的有()。A、是施工定额、预算定额和概算指标的统称
最新回复
(
0
)