LSA Sequence Number用于检测过期和重复的LSA，是一个32位的有符号整数，所以最大的LSA Sequence Number是Ox7FFFFFFF..

第1题

[多选题] 下面哪部分属于OSPF LSA报文头部包含字段（）

A、LSA age B、LSA type C、Router ID D、LS sequence number

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第2题

[判断题] OSPF协议中，不能仅根据LS Sequence Number和LS age来判断相同LSA的新旧程度。

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第3题

[单选题] 下面关于OSPFLSA格式的描述不正确的是（）

A、LS AGE字段表示LSA已经生存的时间单位是秒 B、LS TYPE字段标识了LSA的格式和功能 C、第一类LSA中adverting router字段表示产生此LSA的路由器的routerid D、LS SEQUENCE NUMBER越小则LSA越新

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第4题

[单选题] 关于LSA描述正确的是（）

A、LS type，Link StateID和Advertising Router的组合共同识别一条LSA B、LS type，Linke StateID和LS se quence number的组合共同识别一条LSA C、LS type，LS se quence numbe和Advertising Router的组合共同标识一条LSA D、LS se quence number，Link State ID和Advertising Router的组合共同标识一条LSA

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第5题

[单选题] IS-IS路由器使用哪个来请求在数据库中丢掉的信息（）

A、Hello B、Link-State C、Complete Sequence Number D、Partial Sequence Number

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第6题

[] When performing incomplete recovery using UNTIL SEQUENCE with RMAN， which two pieces of information are required？（）

A、A.Thread number. B、B.Log Sequence number. C、C.Control file sequence number. D、D.Name of the last archived log.

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第7题

[多选题] Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2(30) JOB_ID NUMBER\ SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER Foreign key to DEPARTMENT_ID column of the DEPARTMENTS table You created a sequence called EMP_ID_SEQ in orderto populate sequential values for the EMPLOYEE_ID column of the EMPLOYEES table. Which two statements regarding the EMP_ID_SEQ sequence are true? （）

A、You cannot use the EMP_ID_SEQ sequence to populate the JOB_ID column. B、The EMP_ID_SEQ sequence is invalidated when you modify the EMPLOYEE_ID column. C、The EMP_ID_SEQ sequence is not affected by modifications to the EMPLOYEES table. D、Any other column of NUMBER data type in your schema can use the EMP_ID_SEQ sequence. E、The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEES table. F、The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEE_ID column.

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第8题

[多选题] Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2(30) JOB_ID NUMBER\ SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER Foreign key to DEPARTMENT_ID column of the DEPARTMENTS table You created a sequence called EMP_ID_SEQ in orderto populate sequential values for the EMPLOYEE_ID column of the EMPLOYEES table. Which two statements regarding the EMP_ID_SEQ sequence are true? （）

A、You cannot use the EMP_ID_SEQ sequence to populate the JOB_ID column. B、The EMP_ID_SEQ sequence is invalidated when you modify the EMPLOYEE_ID column. C、The EMP_ID_SEQ sequence is not affected by modifications to the EMPLOYEES table. D、Any other column of NUMBER data type in your schema can use the EMP_ID_SEQ sequence. E、The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEES table. F、The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEE_ID column.

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第9题

[多选题] Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2(30) JOB_ID NUMBER SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER Foreign key to DEPARTMENT_ID column of the DEPARTMENTS table You created a sequence called EMP_ID_SEQ in order to populate sequential values for the EMPLOYEE_ID column of the EMPLOYEES table. Which two statements regarding the EMP_ID_SEQ sequence are true? （）

A、You cannot use the EMP_ID_SEQ sequence to populate the JOB_ID column. B、The EMP_ID_SEQ sequence is invalidated when you modify the EMPLOYEE_ID column. C、The EMP_ID_SEQ sequence is not affected by modifications to the EMPLOYEES table. D、Any other column of NUMBER data type in your schema can use the EMP_ID_SEQ sequence. E、The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEES table. F、The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEE_ID column.

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LSA Sequence Number用于检测过期和重复的LSA，是一个32位的有符号整数，所以最大的LSA Sequence Number是Ox7FFFFFFF

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