How is an IP address removed from a network interface?()
A、rmdev -dl ent0
B、ifconfig en0 down
C、ifconfig en0 delete
D、ifconfig ent0 detach
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A number of applications issue the following SQL statement:SELECT d.deptno, e.empno, e.salary FROM department d INNER JOIN employee e ON d.deptno = e.deptnoA database administrator wishes to store this query within the database. Which of the following database objects can be used to accomplish this?()
A、Alias
B、View
C、Schema
D、Trigger
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为了在法律上可行,以下所有的内容在合同中必须明确规定,除了()。
A、法定资格
B、双方同意
C、合适的合同形式
D、定价
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采取顺序文件结构,连续存取一批相邻的记录时,存取速度很慢。
A、对
B、错
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公司尚未向InterNIC申请永久网络ID,这样,您可以使用保留给专有内部网的B类网络ID172.16.0.0要求您根据这个IP编址方案计算子网掩码考虑到将会有近50个子网,而每个子网必须能够容纳超过800台主机,这样,您将使用下列哪一个子网掩码()
A、255.255.240.0
B、255.255.248.0
C、255.255.252.0
D、255.255.254.0
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Given the following ALTER SEQUENCE statement: ALTER SEQUENCE myseq RESTART WITH 0 INCREMENT BY 1 NO MAXVALUE CACHE 5 ORDER Assuming that the sequence had reached a value of 100 prior to the RESTART, which of the following is true?()
A、The next value will be 0 and the sequence will never use the values 101 to 105.
B、The next value will be 101 to ensure uniqueness between existing and newly generated sequence values.
C、Previously cached values are retained by DB2, and after the restart, will be used for values 101 to 105.
D、The next value will be 0 and DB2 will not ensure uniqueness between existing and newly generated values.