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更多“Which of the following privileges permits a user to update the comment on a sequence?() ”相关问题
  • 第1题:

    publicclassPerson{privateStringname,comment;privateintage;publicPerson(Stringn,inta,Stringc){name=n;age=a;comment=c;}publicbooleanequals(Objecto){if(!(oinstanceofPerson))returnfalse;Personp=(Person)o;returnage==p.age&&name.equals(p.name);}}WhatistheappropriatedefinitionofthehashCodemethodinclassPerson?()

    A.returnsuper.hashCode();

    B.returnname.hashCode()+age*7;

    C.returnname.hashCode()+comment.hashCode()/2;

    D.returnname.hashCode()+comment.hashCode()/2-age*3;


    参考答案:B

  • 第2题:

    “把查询sc表和更新sc表的grade列的权限授予用户user”的正确SQL语句是( )。

    A)GRANT SELECT sc,UP DATE sc.Grade TO user

    B)GRANT SELECT,UP DATE (grade) ON TABLE sc TO user

    C)GRANT SELECT,UP DATE ON TABLE sc.Grade TO user

    D)GRANT SELECT ON TABLE sc,UP DATE ON TABLE sc(grade) TO user


    正确答案:B

  • 第3题:

    The burden of proving unseaworthiness is upon those who ______ it.

    A.approves

    B.alleges

    C.allows

    D.permits


    正确答案:B

  • 第4题:

    在SQL Server 2000中,某数据库中有角色Role和用户User,User是Role角色的成员,且只属于该角色。先对Table表给Role只授予SELECT和DELETE权限,并授予User对T表具有SELECT、UPDATE和DENY DELETE权限,则用户User对Table表可以执行的操作是______。


    正确答案:查询和更改数据
    查询和更改数据

  • 第5题:

    The provisional pratique by radio ______ a vessel to proceed directly to berths or working anchorages and begin normal business activities without the inspection of the Port Health Officer.

    A.permit

    B.permitting

    C.is permitted

    D.permits


    正确答案:D

  • 第6题:

    以下那一个选项是查询数据方法:

    A.User.objects.filter(username='wangwu').get(pk=1)

    B.User.objects.filter(id=user_id).update(password='9999')

    C.User.objects.all().delete()

    D.User.objects.get(pk=user_id).delete()


    query()