单选题In which cases is reference partitioning effective in enhancing performance？（）AIt is effective only in partition pruning.BIt is effective only in partitionwise joins provided that the query predicates are different from the partitioning key.CIt is effe

题目
单选题
In which cases is reference partitioning effective in enhancing performance？（）
A

 It is effective only in partition pruning.

B

 It is effective only in partitionwise joins provided that the query predicates are different from the partitioning key.

C

 It is effective in both partition pruning as well as partitionwise joins provided that the query predicates are identical to the partitioning key.

D

 It is effective in both partition pruning as well as partitionwise joins irrespective of whether the query predicates are different from or identical to the partitioning key.

相似考题

1.Which of the following is often overlooked in achieving effective communication?A speaking clearlyB listeningC interpretingD maintaining eye contactE manipulating the conversation

2.Which two statements are true regarding partitioning in Mysql?()A.Tables with BLOB and TEXT columns cannot be partitionedB.Partitioning allows easier management of smaller data sets for certain queriesC.Partitioning allows different columns to be stored in separate filesD.The partitioning expression is an integer or function that returns an integer value or NULL valueE.Partitioning is only available for those storage engines that implements it natively

3.Which of the following storage tools could be used to initiate the rebuilding of a failed hard drive?()A. RAID array managementB. CHKDSKC. Monitoring agentsD. Partitioning management

4.In which cases is reference partitioning effective in enhancing performance?()A. It is effective only in partition pruning.B. It is effective only in partitionwise joins provided that the query predicates are different from the partitioning key.C. It is effective in both partition pruning as well as partitionwise joins provided that the query predicates are identical to the partitioning key.D. It is effective in both partition pruning as well as partitionwise joins irrespective of whether the query predicates are different from or identical to the partitioning key.

更多“In which cases is reference partitioning effective in enhanc”相关问题

  • 第1题：

    Which of the following could BEST be used to recover a failed RAID 1 disk after it has been replaced?()

    A. Tape restore utilities

    B. Imaging utilities

    C. Partitioning utilities

    D. Array management utilities


    参考答案：B

  • 第2题：

    Which statement about tunnel bow thrusters fitted to large vessels is TRUE ________．

    A.They are effective on most vessels at speeds up to 10 knots

    B.Because of their location，most modern installations have as much power as a tug

    C.They are fully effective at all drafts

    D.When going astern at slow speed，they provide effective steering control


    正确答案：D

  • 第3题：

    There are many fascinating cases_____ people actually dreamt about things which later happened to them。

    A.where
    B.when
    C.which
    D.what

    答案：A
    解析：
    本题考查定语从句的关系词辨析。题目意为“有许多有趣的例子，人们实际上梦到了后来发生在他们身上的事情。”A选项是关系副词，相当于介词+which；B选项是关系副词，一般用来表示时间；C选项是关系代词，一般在定语从句中做主语或宾语； D选项不能用于定语从句中。根据题意，空格处选择“where”。

    考点
    定语从句

  • 第4题：

    Which of the following security mitigation techniques is the MOST effective against zero-day attacks?（）

    • A、Update antivirus definitions
    • B、MAC filtering
    • C、Effective security policies
    • D、User awareness training

    正确答案:D

  • 第5题：

    Which of the following storage tools could be used to initiate the rebuilding of a failed hard drive?（）

    • A、RAID array management
    • B、CHKDSK
    • C、Monitoring agents
    • D、Partitioning management

    正确答案:A

  • 第6题：

    Which of the following features sets IBM apart from competitors in the area of partitioning？（）

    • A、Software support
    • B、Hardware isolation
    • C、Static changes in partitions
    • D、Micro-Partitioning

    正确答案:D

  • 第7题：

    In Oracle 11g， which recommendations does the SQL Access Advisor generate？（）  

    • A、 partitioning recommendations
    • B、 statistics collection recommendations
    • C、 index creation recommendations
    • D、 materialized view recommendations
    • E、 materialized view log recommendations

    正确答案:A,C,D,E

  • 第8题：

    多选题
    Which two statements are true regarding partitioning in Mysql?（）
    A

    Tables with BLOB and TEXT columns cannot be partitioned

    B

    Partitioning allows easier management of smaller data sets for certain queries

    C

    Partitioning allows different columns to be stored in separate files

    D

    The partitioning expression is an integer or function that returns an integer value or NULL value

    E

    Partitioning is only available for those storage engines that implements it natively


    正确答案： A,C
    解析： 暂无解析

  • 第9题：

    单选题
    Which statement about firefighting foam is TRUE?（）
    A

    Foam conducts electricity

    B

    To be most effective，foam should be directed at the base of the fire

    C

    Foam is most effective on burning liquids which are flowing

    D

    Foam can ONLY be used to extinguish class A fires


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Libraries have reference books ______ you can check out a physician’s educational background, training, and other credentials.
    A

    from that

    B

    in which    

    C

    through that

    D

    by which


    正确答案： A
    解析：
    图书馆有参考书，你可以用来查明一位理学家的教育背景、所受训练以及其他能力证明等。该句子的正常语序应该是you can check out a physician’s education background in the reference book, 当用which来指代reference book时，前面的in不要省略。

  • 第11题：

    单选题
    Effective next month, Ms. Garcia ______ responsible for handling all the disciplinary cases that are sent to the principal’s office.
    A

    was

    B

    to be

    C

    had been

    D

    will be


    正确答案： D
    解析：
    句意：从下月起，加西亚女士将负责处理所有交到校长办公室的违纪事件。根据句中表示将来时间的next month，可知用将来时，因此选择D。be responsible for负责。case事情，事件。disciplinary纪律的。

  • 第12题：

    问答题
    Topic 6：Can shopping vouchers increase consumption?　　Questions for Reference:　　1) To stimulate consumption, which is more effective, tax reduction or shopping vouchers?　　2) What are the major purposes of issuing shopping vouchers?　　3) In what way can the shopping vouchers best be distributed? Shall every citizen be given the same amount of shopping vouchers or should the vouchers be limited to the lower-income people only?

    正确答案： 【参考答案】
    My name is my registration number is Today I will share with you my opinion about shopping vouchers. Shopping vouchers are now being widely used these days. Some economists have suggested that issuing shopping vouchers is a good way to tackle the economic crisis because it can stimulate consumers’ desire to purchase more commodities. Here is the question: Can shopping vouchers really increase consumption?
    As we know, the government has worked out an economic stimulus package, trying to tap the country’s huge consumption potential. For one thing, the citizens in some places have got shopping vouchers for free. Some people think that it is a pretty effective approach and will bring immediate returns because shopping vouchers have a time limit and thus will immediately promote domestic consumption. However, the truth is: numerous people having received vouchers have chosen to cash in the vouchers and saved the money instead of shopping. To some extent, it hasn’t turned out as originally planned. Why? As some critic have said, China still has a long way to go in improving the economic environment to encourage consumption by issuing shopping vouchers. People can enjoy the happiness only when they are covered by an effective social security network and enjoy higher income.
    To sum up, to stimulate Chinese residents’ consumption, the government should first guarantee a sound social security system, covering health, unemployment, education and housing, and so on. After all of these have been done, people will have enough money to spend and with the promotion of consumption, their life can be gradually improved.
    解析： 暂无解析

  • 第13题：

    Which of the following security mitigation techniques is the MOST effective against zero－day attacks?()

    A.Update antivirus definitions

    B.MAC filtering

    C.Effective security policies

    D.User awareness training


    参考答案：D

  • 第14题：

    In most cases involving spillage of dangerous goods，the most effective response will probably be to ______．

    A.attempt to repack dangerous goods

    B.close all hatches and doors

    C.open all hatches and doors

    D.wash the substance overboard or jettison it


    正确答案：D

  • 第15题：

    Using the following information: Performance data from an existing system that a new system will replace; Performance estimates that anticipate future workloads; Micro-partitioning and logical partitioning implementations. Which of the following allows a technical sales representative to create a system design which can be imported into an HMC?（）

    • A、IBMeConfig
    • B、IBM Performance Monitor
    • C、IBM Workload Estimator (WLE)
    • D、IBM System Planning Tool (SPT)

    正确答案:D

  • 第16题：

    Which protocols are found in the network layer of the OSI reference model and are responsible for path determination and traffic switching?（）

    • A、LAN
    • B、routing
    • C、WAN
    • D、network

    正确答案:B

  • 第17题：

    Which of the following could BEST be used to recover a failed RAID 1 disk after it has been replaced？（）

    • A、 Tape restore utilities
    • B、 Imaging utilities
    • C、 Partitioning utilities
    • D、 Array management utilities

    正确答案:D

  • 第18题：

    Which two statements are true regarding partitioning in Mysql?（）

    • A、Tables with BLOB and TEXT columns cannot be partitioned
    • B、Partitioning allows easier management of smaller data sets for certain queries
    • C、Partitioning allows different columns to be stored in separate files
    • D、The partitioning expression is an integer or function that returns an integer value or NULL value
    • E、Partitioning is only available for those storage engines that implements it natively

    正确答案:B,E

  • 第19题：

    单选题
    Which of the following could BEST be used to recover a failed RAID 1 disk after it has been replaced？（）
    A

     Tape restore utilities

    B

     Imaging utilities

    C

     Partitioning utilities

    D

     Array management utilities


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    Which of the following storage tools could be used to initiate the rebuilding of a failed hard drive？（）
    A

     RAID array management

    B

     CHKDSK

    C

     Monitoring agents

    D

     Partitioning management


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    In which cases is reference partitioning effective in enhancing performance？（）
    A

     It is effective only in partition pruning.

    B

     It is effective only in partitionwise joins provided that the query predicates are different from the partitioning key.

    C

     It is effective in both partition pruning as well as partitionwise joins provided that the query predicates are identical to the partitioning key.

    D

     It is effective in both partition pruning as well as partitionwise joins irrespective of whether the query predicates are different from or identical to the partitioning key.


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    The waterplane area is described as the intersection of the surface of the water in which a vessel floats and the（）.
    A

    baseline

    B

    vertical reference plane

    C

    hull

    D

    horizontal reference plane


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    Which layer of the OSI reference model uses flow control, sequencing, and acknowledgements to ensure that reliable networking occurs?（）
    A

    data link

    B

    network

    C

    transport

    D

    presentation

    E

    physical


    正确答案： A
    解析： 暂无解析

  • 第24题：

    单选题
    Which extinguishing agent is most effective on a mattress fire?（）
    A

    CO2

    B

    Foam

    C

    Dry Chemical

    D

    Water


    正确答案： C
    解析： 暂无解析

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