What operation on relations R and S produces the relation shown below?A．UnionB．DifferenceC．IntersectionD．Division

题目

What operation on relations R and S produces the relation shown below?

A．Union

B．Difference

C．Intersection

D．Division

相似考题

1.●Let R and S be the relation respection respectively：Relation R:A B C Relation S:B C D1 2 3 2 3 46 7 8 2 3 59 7 8 7 8 1The number of tuples that the result of the expression R∞S(Here if natural join of relations R and S) is (69) ．(69) A．1B．4C．7D．10

2.Let R and S be the following relations：A．3B．4C．5D．6

3.What is the contra positive of the relation represented in the exhibit shown below?A．R= {<1,2>,< 1,3>,<1,4>,<1,5>}B．R= {< 1,1>,<2,2>,<3,3>,<4,4>,<5,5>}C．R= {<2,1 >,<4,1>,<2,2>,<1,3>,<3,2>,<1,4>,<4,4>,<5,4>}D．R= {<1,2>,<3,1>,<1,4>,<2,2>,<2,3>,<4,1>,<4,4>,<4,5>}

4.The software structure is an expression of the relationship among software modules.In the following phrases, which are NOT the relations among software modules? (2 Points)Ⅰ.calling relationⅡ.belonging relationⅢ.Execution relationⅣ.process relationA．Ⅰ and ⅡB．Ⅱ and ⅢC．Ⅲ and ⅣD．none

更多“What operation on relations R and S produces the relation shown below?A.UnionB.DifferenceC ”相关问题

  • 第1题：

    Let R and S be the relation respectively: Relation R: A B C Relation S: B C D 1 2 3 2 3 4 6 7 8 2 3 5 The number of tuplesthat the result of the expression R ∞ S (Here is the natural join of relations R and S) is

    A．3

    B．4

    C．6

    D．9


    正确答案：B

  • 第2题：

    Because the article falls ________ the scope of our business activities, we are writing to you in the hope of ________ trade relations with you.

    A、within; establishment

    B、within; establishing

    C、below; set up

    D、below; setting up


    正确答案:B

  • 第3题：

    The S.S. Hollowpoint has a charter party in which the charterer assumes no responsibility for the operation of the vessel but pays stevedoring expenses. What is the name of the charter party? ______.

    A.Bareboat

    B.Dispatch

    C.Voyage

    D.Demise


    正确答案：C

  • 第4题：

    What are the sense relations between sentences?
    Sense relations between sentences:
    1) X is synonymous with Y.
    2) X is inconsistent with Y.
    3) X entails Y.(Y is an entailment of X.)
    4) X presupposes Y. (Y is a prerequisite of X)
    5) X is a contradiction.
    6) X is semantically anomalous.
    略

  • 第5题：

    Router R-1 is configured for BGP routing as shown below： router bgp 65300network 27.0.0.0neighbor 192.23.1.1 remote-as 65300 From the perspective of router R-1， what kind of router is the router with IP address 192.23.1.1？（）

    • A、A peer router running IBGP
    • B、A peer router running EBGP
    • C、A community member running IBGP
    • D、A peer group member running IBGP
    • E、A peer group member running EBGP

    正确答案:A

  • 第6题：

    Where can you add your own PL/SQL code in relation-handling triggers?（）

    • A、Before the "End default relation program section" comment. 
    • B、After the "Begin default relation program section" comment. 
    • C、Before the "Begin default relation program section" comment. 
    • D、It is not possible to modify the relation-handling code that Forms automatically creates for relations.

    正确答案:C

  • 第7题：

    单选题
    You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced? （）
    A

    Relative

    B

    TRUE

    C

    Compass

    D

    Magnetic


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    What is the main topic of this passage?
    A

    The increasing rate of crime in London.

    B

    The center of England’s cultural diversity.

    C

    The people’s criticism of London police.

    D

    The poor inter-racial relations in London.


    正确答案： B
    解析：
    文章第一段末句首先指出“London is far from being without its racial problems”，接着具体描述了英国存在的种族歧视现象和警方采取的行动，最后提到每年的Carnival（狂欢节）庆祝“variety, difference and the end of slavery”，来自不同种族的人们会一起歌唱和舞蹈，作者表示希望这就是the future of inter-racial relations in London。因此D项最能涵盖文章的主题。

  • 第9题：

    单选题
    Generally speaking, the syntactic relations include three basic types. Which of the following is NOT a type of syntactic relations?
    A

    Positional relations.

    B

    Relations of substitutability.

    C

    Relations of co-occurrence.

    D

    Syntagmatic relation.


    正确答案： B
    解析：

  • 第10题：

    单选题
    An active PowerHA cluster was shutdown from C-SPOC with the "Unmanage Resource Groups" option. Afterthe operation successfully completes， what is the internal state of the cluster manager as shown by the lssrc -ls clstrmgrES command？（）
    A

    ST_STABLE

    B

    ST_BARRIER

    C

    ST_CBARRIER

    D

    ST_UNMANAGED


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    You want to implement a master-detail relation between data blocks based on object tables. How would you do this? （）
    A

    Create the relation manually and coordinate the blocks using triggers. 

    B

    Base the relation on a REF pointer using the Data Block Wizard. 

    C

    Base the relation on a foreign key using the Data Block Wizard. 

    D

    This task is not possible because master-detail relations can be implemented only for blocks based on relation tables.


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    公共关系的英文是（）。
    A

    public relations         

    B

    public relation

    C

    publication relations 

    D

    publication relation


    正确答案： A
    解析： 暂无解析

  • 第13题：

    Let R and S be the relation respectively: Relation R:A B C Relation S:B C D 1 2 3 2 3 4 6 7 8 2 3 5 9 7 8 7 8 1 The number of tuples that the result of the expression R ∞ S( Here is the natural join of relations R and S)is(69).

    A．1

    B．4

    C．7

    D．10


    正确答案：B
    解析：译文：关系R和S分别是R：ABC，关系S：BCD。表达式R∞S(这里是R、S的自然连接)的结果的元组个数为4。

  • 第14题：

    Router R1 is configured as shown below:router eigrp 100network 10.0.0.0eigrp stubBased on the information shown above, which two types of routes will be advertised?()

    A. Receive - only

    B. Stub

    C. Static

    D. Summary

    E. Connected

    F. Dynamic


    参考答案：D, E

  • 第15题：

    In relation to cargo gear, what does SWL mean ?______.

    A.Safe working load

    B.Ship’s working lift

    C.Starboard wing lift

    D.Stress, weight, load


    正确答案：A
    关于货物设备，SWL是什么意思？安全工作负荷

  • 第16题：

    An active PowerHA cluster was shutdown from C-SPOC with the "Unmanage Resource Groups" option. Afterthe operation successfully completes， what is the internal state of the cluster manager as shown by the lssrc -ls clstrmgrES command？（）

    • A、ST_STABLE
    • B、ST_BARRIER
    • C、ST_CBARRIER
    • D、ST_UNMANAGED

    正确答案:A

  • 第17题：

    Router R1 is configured as shown below: router eigrp 100 network 10.0.0.0 eigrp stub Based on the information shown above, which two types of routes will be advertised？（）

    • A、Receive - only
    • B、Stub
    • C、Static
    • D、Summary
    • E、Connected
    • F、Dynamic

    正确答案:D,E

  • 第18题：

    单选题
    There are generally three kinds of sense relations recognized, sameness relation, oppositeness relation and inclusiveness relation. They are represented by _____ respectively.
    A

    synonymy, antonymy, and hyponymy

    B

    synonymy, hyponymy, and antonymy

    C

    antonymy, synonymy, and hyponymy


    正确答案： C
    解析：
    有三种涵义关系，分别为同义关系，反义关系和上下义关系。

  • 第19题：

    单选题
    In relation to cargo gear，what does SWL mean?（）.
    A

    Safe working load

    B

    Ship's working lift

    C

    Starboard wing lift

    D

    Stress，weight，load


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    Where can you add your own PL/SQL code in relation-handling triggers?（）
    A

    Before the End default relation program section comment. 

    B

    After the Begin default relation program section comment. 

    C

    Before the Begin default relation program section comment. 

    D

    It is not possible to modify the relation-handling code that Forms automatically creates for relations.


    正确答案： A
    解析： 暂无解析

  • 第21题：

    多选题
    Router R1 is configured as shown below: router eigrp 100 network 10.0.0.0 eigrp stub Based on the information shown above, which two types of routes will be advertised？（）
    A

    Receive - only

    B

    Stub

    C

    Static

    D

    Summary

    E

    Connected

    F

    Dynamic


    正确答案： B,A
    解析： 暂无解析

  • 第22题：

    单选题
    The S.S. Hollowpoint has a charter party in which the charterer assumes no responsibility for the operation of the vessel but pays stevedoring expenses. What is the name of the charter party? （）.
    A

    Bareboat

    B

    Dispatch

    C

    Voyage

    D

    Demise


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    Router R-1 is configured for BGP routing as shown below： router bgp 65300network 27.0.0.0neighbor 192.23.1.1 remote-as 65300 From the perspective of router R-1， what kind of router is the router with IP address 192.23.1.1？（）
    A

    A peer router running IBGP

    B

    A peer router running EBGP

    C

    A community member running IBGP

    D

    A peer group member running IBGP

    E

    A peer group member running EBGP


    正确答案： D
    解析： 暂无解析

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