Which statements concerning the value of a member variable are true， when no explicit assignments have been made？（）  A、The value of an int is undetermined.B、The value of all numeric types is zero.C、The compiler may issue an error if the variable is used b

题目

Which statements concerning the value of a member variable are true， when no explicit assignments have been made？（）  

  • A、The value of an int is undetermined.
  • B、The value of all numeric types is zero.
  • C、The compiler may issue an error if the variable is used before it is initialized.
  • D、The value of a String variable is "" （empty string）.
  • E、The value of all object variables is null.
相似考题

1.A sequence was created with the DDL statement shown below:CREATE SEQUENCE my_sequence CACHE 10 ORDER The following statements are successfully executed in sequence through separate database connections: CONNECTION1 - VALUES NEXT VALUE FOR my_sequence INTO :con1hvar CONNECTION2 - VALUES NEXT VALUE FOR my_sequence INTO :con2hvar CONNECTION1 - VALUES NEXT VALUE FOR my_sequence INTO:con1hvarWhat is the current value of the :con1hvar host variable?（）A.2B.3C.11D.30

2.Which of the following statements is NOT a way of consolidating vocabulary A.Defining. B.Matching. C.Gapfilling. D.Labeling.

3.Which of the following statements is true regarding the VERSIONS BETWEEN clause？（）  A、 The VERSIONS BETWEEN clause may be used in DML statements.B、 The VERSIONS BETWEEN clause may be used in DDL statements.C、 The VERSIONS BETWEEN clause may not be used to query past DDL changes to tables.D、 The VERSIONS BETWEEN clause may not be used to query past DML statements to tables.

4.Which three statements are correct about the differences in IS － IS and OSPF?()A. IS - IS is more CPU - intensive than is OSPFB. For greater fine tuning there are more IS - IS timersC. IS - IS LSP con tains TLV fields and OSPF LSU contains the LSAsD. New additions to the protocol are easily implemented in OSPF but not with IS - ISE. OSPF has more area types than does IS - IS

更多“Which statements con”相关问题

  • 第1题：

    Which three statements are valid SDM configuration wizards？ （）

    • A、NAT
    • B、VPN
    • C、STP
    • D、Security Audit

    正确答案:A,B,D

  • 第2题：

    A sequence was created with the DDL statement shown below:CREATE SEQUENCE my_sequence CACHE 10 ORDER The following statements are successfully executed in sequence through separate database connections: CONNECTION1 - VALUES NEXT VALUE FOR my_sequence INTO :con1hvar CONNECTION2 - VALUES NEXT VALUE FOR my_sequence INTO :con2hvar CONNECTION1 - VALUES NEXT VALUE FOR my_sequence INTO:con1hvarWhat is the current value of the :con1hvar host variable?（）

    • A、2
    • B、3
    • C、11
    • D、30

    正确答案:B

  • 第3题：

    Which is the source used by Automatic SQL Tuning that runs as part of the AUTOTASK framework？（）

    • A、 SQL statements that are part of the AWR baseline only
    • B、 SQL statements based on the AWR top SQL identification
    • C、 SQL statements that are part of the available SQL Tuning Set （STS） only
    • D、 SQL statements that are available in the cursor cache and executed by a user other than SYS

    正确答案:B

  • 第4题：

    多选题
    Concerning the figure below, if a =b, which of the following statements must be true? (Indicate all such statements.)
    A

    c=d

    B

    l and k are parallel

    C

    m and l are perpendicular


    正确答案： C,B
    解析：
    根据题目中的已知信息无法推断出各直线的关系，因此B、C均不正确；而由图示可知，c和d分别是a和b的补角，由于a=b，所以c=d，A项正确。

  • 第5题：

    多选题
    Which are DML statements? （）
    A

    COMMIT

    B

    MERGE

    C

    UPDATE

    D

    DELETE

    E

    CREATE

    F

    DROP...


    正确答案： D,F
    解析： 暂无解析

  • 第6题：

    多选题
    Which three statements are correct about the differences in IS - IS and OSPF?（）
    A

    IS - IS is more CPU - intensive than is OSPF

    B

    For greater fine tuning there are more IS - IS timers

    C

    IS - IS LSP con tains TLV fields and OSPF LSU contains the LSAs

    D

    New additions to the protocol are easily implemented in OSPF but not with IS - IS

    E

    OSPF has more area types than does IS - IS


    正确答案： C,E
    解析： 暂无解析

  • 第7题：

    多选题
    Which two statements are reserved words in Java？（）
    A

    Run

    B

    Import

    C

    Default

    D

    Implement


    正确答案： B,D
    解析： 暂无解析

  • 第8题：

    多选题
    Which are DML statements? （）
    A

    COMMIT

    B

    MERGE

    C

    UPDATE

    D

    DELETE

    E

    CREATE

    F

    DROP


    正确答案： E,C
    解析： 暂无解析

  • 第9题：

    单选题
    Your company has a mix of employees and contractors. Contractor usernames always begin with"con-"; employee usernames never begin with "con-". You need to give employees access to allresources and give contractors access to a limited set of resources. Employee and contractor roles have been created with the appropriate access privileges, and the realm is set to merge settings for all assigned roles. Which role mapping ruleset would result in the correct access privileges being assigned?（）
    A

    username=* -> Employee-role Stop username=con-* -> Contractor-role

    B

    username=* -> Employee-role username=con-* -> Contractor-role Stop

    C

    username=con-* -> Contractor-role Stop username=* -> Employee-role

    D

    username=con-* -> Contractor-role username=* -> Employee-role Stop


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Which of the following statements is correct concerning the “flash point ” of a liquid?（）
    A

    It is lower than the ignition temperature

    B

    It is the temperature at which a substance will spontaneously ignite

    C

    It is the temperature at which a substance, when ignited, will continue to bum

    D

    It is the temperature at which the released vapors will fall within the explosive range


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    Which of the following statements is true regarding the VERSIONS BETWEEN clause？（）
    A

     The VERSIONS BETWEEN clause may be used in DML statements.

    B

     The VERSIONS BETWEEN clause may be used in DDL statements.

    C

     The VERSIONS BETWEEN clause may not be used to query past DDL changes to tables.

    D

     The VERSIONS BETWEEN clause may not be used to query past DML statements to tables.


    正确答案： A
    解析： 暂无解析

  • 第12题：

    Which three statements are correct about the differences in IS - IS and OSPF?（）

    • A、IS - IS is more CPU - intensive than is OSPF
    • B、For greater fine tuning there are more IS - IS timers
    • C、IS - IS LSP con tains TLV fields and OSPF LSU contains the LSAs
    • D、New additions to the protocol are easily implemented in OSPF but not with IS - IS
    • E、OSPF has more area types than does IS - IS

    正确答案:B,C,E

  • 第13题：

    A sequence was created with the DDL statement shown below:CREATE SEQUENCE my_seq START WITH 5 INCREMENT BY 5 CACHE 5 User1 successfully executes the following statements in Connection1: VALUES NEXT VALUE FOR my_seq INTO :con1hvar VALUES NEXT VALUE FOR my_seq INTO :con1hvar User2 successfully executes the following statement in Connection2: VALUES NEXT VALUE FOR my_seq INTO :con2hvar After User1 & User2 are finished, User3 executes the following statement in Connection3: SELECT NEXT VALUE FOR my_seq FROM sysibm.sysdummy1Which value will be returned by the query?（）

    • A、20
    • B、25
    • C、50
    • D、55

    正确答案:D

  • 第14题：

    多选题
    If p and q are primes greater than 2, which of the following statements must be true? (Indicate all such statements.)
    A

    p + q is even

    B

    pq is odd

    C

    p2-q2 is even


    正确答案： A,B
    解析：
    由于所有大于2的质数都是奇数，因此p和q均是奇数，两奇数相加为偶数，所以A项正确；两奇数的乘积还是奇数，所以B项正确；两奇数的平方还各自是奇数，而两奇数的平方之差是偶数，因此C项也正确；所以选择A、B、C三项。

  • 第15题：

    多选题
    Which of the following statements are true? (Indicate all such statements.)
    A

    τ(5) =τ(7)

    B

    τ(5) τ(7) =τ(35)

    C

    τ(5) + τ(7) =τ(12)


    正确答案： A,B
    解析：
    5和7均只有两个正除数，因此根据题干信息，A项正确；35有四个正除数，所以B项也是正确的；12有6个正除数，因此C项错误；选择A、B两项。

  • 第16题：

    单选题
    On which side shall we get alongside the wharf?（）
    A

    On port side .

    B

    On right side.

    C

    On left side.

    D

    On deck.


    正确答案： A
    解析： 暂无解析

  • 第17题：

    单选题
    Which step can be used to trap runtime script errors and recover gracefully?（）
    A

    Set  

    B

    Call Subflow  

    C

    On Exception Goto  

    D

    Get Reporting Statistic 


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    Which of the following statements is NOT a way of consolidating vocabulary?
    A

    Defining.

    B

    Matching.

    C

    Gap-filling.

    D

    Labeling.


    正确答案： D
    解析：

  • 第19题：

    单选题
    Which of the following statements does the author support?
    A

    Specialists are more expensive to hire than generalists.

    B

    Formal schooling is less important than job training.

    C

    On-the-job training is, in the long run, less costly.

    D

    Generalists will outdo specialists in management.


    正确答案： A
    解析：
    态度题。根据第四段倒数第二句，作者评论说，尽管公司通常雇佣专门人才作新雇员，但他们经常寻找全才来充当中高级管理人才，这表明作者赞成全才超过专业人才，故只有D项符合原文。

  • 第20题：

    单选题
    For the following statements， which one is the strongest symmetrical encryption algorithm？（）
    A

    AES

    B

    3DES

    C

    DES

    D

    Diffie-Hellman


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    Which is the source used by Automatic SQL Tuning that runs as part of the AUTOTASK framework？（）
    A

     SQL statements that are part of the AWR baseline only

    B

     SQL statements based on the AWR top SQL identification

    C

     SQL statements that are part of the available SQL Tuning Set （STS） only

    D

     SQL statements that are available in the cursor cache and executed by a user other than SYS


    正确答案： A
    解析： 暂无解析

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