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禁用约束时出现下列错误：ORA-02297：cannot disable constraint-dependencies exist。这个错误是由于禁止下列哪个约束造成的？（）
- A、检查约束
- B、非NULL约束
- C、外键约束
- D、惟一约束
参考答案
更多 “禁用约束时出现下列错误：ORA-02297：cannot disable constraint-dependencies exist。这个错误是由于禁止下列哪个约束造成的？（）A、检查约束B、非NULL约束C、外键约束D、惟一约束” 相关考题
考题
There are three routers on a Gigabit Ethernet LAN: Router A, Router B, and Router C. Router A is the Designated Intermediate System (DIS) at Level 1 for that LAN. Router A‘s DIS priority is 64. The LAN is a Level 1-only link. Router D has just been powered up on that same LAN and its DIS priority is 80.Which statement is true?（）A. Router A remains the DIS and generates a new pseudonode LSP for that LANB. Router A remains the DIS and NO new pseudonode LSP is generated for that LANC. Router D becomes the new DIS, generates a new pseudonode LSP for that LAN, and purges the old pseudonode LSP generated by Router AD. Router D becomes the new DIS, does NOT generate a new pseudonode LSP for that LAN, and does NOT purge the old pseudonode LSP generated by Router A
考题
How often are IS－IS Hello packets transmitted?()
A. 3 seconds for DIS; 9 seconds for non-DISB. 9 seconds for DIS; 3 seconds for non-DISC. 10 seconds for DIS; 3 seconds for non-DISD. 10 seconds for all routers
考题
以下关于DIS选举规则描述正确的是（）。A、DIS的选择需要手动设置B、DIS由整个广播网络上优先级最高的IS担当C、优先级相同时由IP地址最大的担当D、当一个DIS不能工作时，备份DIS会接替它进行工作
考题
下列哪条命令是属于查看单AP下的连接用户数假设AP-name为H3C？（）A、dis wlan ap name H3CB、dis wlan ap name H3C verboseC、dis wlan client ap H3CD、dis wlan server-template
考题
How often are IS-IS Hello packets transmitted?（）A、3 seconds for DIS; 9 seconds for non-DISB、9 seconds for DIS; 3 seconds for non-DISC、10 seconds for DIS; 3 seconds for non-DISD、10 seconds for all routers
考题
单选题正对门机站立，门机上的四个继电器从左到右依次为（）A
JIS、OC、DIS、7KSRB
OC、JIS、DIS、7KSRC
7KSR、DIS、JIS、OCD
D、DIS、JIS、O7KSR
考题
单选题禁用约束时出现下列错误：ORA-02297：cannot disable constraint-dependencies exist。这个错误是由于禁止下列哪个约束造成的？（）A
检查约束B
非NULL约束C
外键约束D
惟一约束
考题
单选题There are three routers on a Gigabit Ethernet LAN: Router A, Router B, and Router C. Router A is the Designated Intermediate System (DIS) at Level 1 for that LAN. Router A's DIS priority is 64. The LAN is a Level 1-only link. Router D has just been powered up on that same LAN and its DIS priority is 80. Which statement is true?（）A
Router A remains the DIS and generates a new pseudonode LSP for that LANB
Router A remains the DIS and NO new pseudonode LSP is generated for that LANC
Router D becomes the new DIS, generates a new pseudonode LSP for that LAN, and purges the old pseudonode LSP generated by Router AD
Router D becomes the new DIS, does NOT generate a new pseudonode LSP for that LAN, and does NOT purge the old pseudonode LSP generated by Router A
考题
多选题Which two statements regarding the IS-IS DIS election process are true？ （）AA priority of 0 will prevent a router from becoming a DIS.BIf the DIS becomes unavailable the backup DIS is promoted to DIS.CAdding a router with a higher priority than the current DIS will result in the new router becoming DIS.DSeparate L1 and L2 election processes are held on a brodcast network.EL1 routers on a broadcast network only establish adjacencies with the DIS.FIf there is a tie based on priority，the router whose attached interface has the lowest MAC address becomes the DIS.
考题
单选题使用掌中宽带时，提示“端口打开错误，请检查端口”，则以下哪项不可能是出现错误的原因（）A
网卡没有插好B
上次程序非正常关闭C
网卡的端口被禁用D
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