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单选题A data warehouse is a subject-oriented data set used for reporting and analusis. Data warehouses can be subdivided into ( ). Which store subsets of data from a warehouse.A OLTPsB transactionsC data sartsD OLAPs

题目
单选题
A data warehouse is a subject-oriented data set used for reporting and analusis. Data warehouses can be subdivided into ( ). Which store subsets of data from a warehouse.
A

OLTPs

B

transactions

C

data sarts

D

OLAPs

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相似问题和答案

第1题:

In data communication, data link is those parts of two data terminal equipments that are controlled by a protocol along with the(71) data circuit, which together enable data(72). So-called protocol means, in short, a set of rules that determines the behavior. of functional units in achieving communication.Data circuit, however, consists of a pair of(73) transmission channels that provides a means of two-way data transmission. Between data switching exchanges, the data circuit may or may not include data circuit-terminating equipment (DCE), depending on the type of(74) used at the data switching exchange. Between a data station and a data switching exchange or data concentrator, the data circuit includes the DCE at the data station end, and may include equipment(75) to a DCE at the data switching exchange or dam concentrator location.

A.handshaking

B.interconnecting

C.linkage

D.joining


正确答案:B

第2题:

How can data quality be quantified in the data warehouse?

如何来量化数据仓库中的数据质量?


正确答案:
答:在数据仓库项目中,通常通过不规则数据的检测工作(Anomaly Detection)来量化源系统的数据质量。除非成立专门的数据质量调查项目组,否则这个工作应该由ETL项目组完成。通常可以采用分组SQL来检查数据是否符合域的定义规则。
对于数据量小的表,可以直接使用类似下面的SQL完成。
select state, count(*) from order_detail group by state
对于数据量大的表,一般通过采样技术来减少数据量,然后进行不规则数据检测。类似SQL如下。
select a.* from employee a, (select rownum counter, a.* from employee a) B where a.emp_id = b.emp_id and mod(b.counter, trunc((select count(*) from employee)/1000,0)) = 0
如果可以采用专门的数据概况分析工具进行的话,可以减少很大的工作量。

第3题:

A Windows Communication Foundation (WCF) application uses a data contract that has several data members. You need the application to throw a SerializationException if any of the data members are not present when a serialized instance of the data contract is deserialized.What should you do?()

A. Add the KnownType attribute to the data contract. Set a default value in each of the data member declarations.

B. Add the KnownType attribute to the data contract. Set the Order property of each data member to unique integer value.

C. Set the EmitDefaultValue property of each data member to false.

D. Set the lsRequired property of each data member to true.


参考答案:D

第4题:

For which of the following is a data warehouse optimized?()

A.Backup and recovery

B.Transactions

C.Security

D.Queries


参考答案:D

第5题:

Which of the following is the correct configuration for a RAID 5 array?()

A. A two disk set with one data strip

B. A three disk set with two data strips and a parity strip

C. A two disk set with two data strips

D. A four disk set with two sets of data strips


参考答案:B

第6题:

What are the primary goals of the data discovery phase of the data warehouse project?

在数据仓库项目中,数据探索阶段的主要目的是什么?


正确答案:
答:
在逻辑数据映射进行之前,需要首先对所有的源系统进行分析。对源系统的分析通常包括两个阶段,一个是数据探索阶段(Data Discovery Phase),另一个是异常数据检测阶段。
数据探索阶段包括以下内容:
1.收集所有的源系统的文档、数据字典等内容。
2.收集源系统的使用情况,如谁在用、每天多少人用、占多少存储空间等内容。
3.判断出数据的起始来源(System-of-Record)。
4.通过数据概况(Data Profiling)来对源系统的数据关系进行分析。
数据探索阶段的主要目的是理解源系统的情况,为后续的数据建模和逻辑数据映射打下坚实的基础。

第7题:

Business intelligence (BI) is the integrated application of data warehouse, data mining and (73).

A.OLAP

B.OLTP

C.MRPII

D.CMS


正确答案:A
商业智能BI是数据仓库,OLAP和数据挖掘等技术的综合应用。OLAP联机分析处理是共享多维信息的、针对特定问题的联机数据访问和分析的快速软件技术。它通过对信息的多种可能的观察形式进行快速、稳定一致和交互性的存取,允许管理决策人员对数据进行深入观察。On-LineTransactionProcessing联机事务处理系统(OLTP),也称为面向交易的处理系统,其基本特征是顾客的原始数据可以立即传送到计算中心进行处理,并在很短的时间内给出处理结果。MRPII是制造资源计划ManufacturingResourcePlanning的缩写;CMS是ContentManagementSystem的缩写,意为"内容管理系统",它具有许多基于模板的优秀设计,可以加快网站开发的速度和减少开发的成本。CMS的功能并不只限于文本处理,它也可以处理图片、Flash动画、声像流、图像甚至电子邮件档案。因此选A

第8题:

● Business intelligence (BI) is the integrated application of data warehouse, data mining and (73).

(73)

A.OLAP

B.OLTP

C.MRPII

D.CMS.


正确答案:A
试题(73)分析
 商业智能BI是数据仓库,OLAP和数据挖掘等技术的综合应用。
 OLAP联机分析处理是共享多维信息的、针对特定问题的联机数据访问和分析的快速软件技术。它通过对信息的多种可能的观察形式进行快速、稳定一致和交互性的存取,允许管理决策人员对数据进行深入观察。
 On-Line Transaction Processing联机事务处理系统(OLTP),也称为面向交易的处理系统,其基本特征是顾客的原始数据可以立即传送到计算中心进行处理,并在很短的时间内给出处理结果。
 MRPII是制造资源计划Manufacturing Resource Planning的缩写;
 CMS是Content Management System的缩写,意为"内容管理系统",它具有许多基于模板的优秀设计,可以加快网站开发的速度和减少开发的成本。CMS的功能并不只限于文本处理,它也可以处理图片、Flash动画、声像流、图像甚至电子邮件档案。
 因此选A
参考答案
(73)A

第9题:

Business intelligence (BI) is the integrated application of data warehouse data mining and ______

A.OLAP

B.OLTP

C.MRPII

D.CMS


正确答案:A

第10题:

()is a collection of data sets,which is so large and complet that is because difficult to process using on hand database management tools or traditional data peocessing applications

A.big data

B.cluster

C.parallel computing

D.data warehouse


正确答案:A

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