A. Diagnose and repair a data file corruption offline.
B. Diagnose and repair a data file corruption online.
C. Diagnose and repair failures on a standby database.
D. Recover from failures in the Real Application Cluster (RAC) environment.
第1题:
YoudecidetoenableFlashbackDatabaseinyourOracle10gdatabasesothatfuturerecoverieswilltakelesstimethantraditionalrecoveries.WhichofthefollowingparametersmustbeincludedinyourinitializationparameterfilebeforeenablingFlashbackDatabase?()
A.DB_RECOVERY_FILE_DESTonly
B.DB_FLASHBACK_RETENTION_TARGETonly
C.DB_RECOVERY_FILE_DEST_SIZEandDB_RECOVERY_FILE_DESTonly
D.DB_RECOVERY_FILE_DESTandDB_FLASHBACK_RETENTION_TARGETonly
E.DB_RECOVERY_FILE_DEST_SIZE,DB_RECOVERY_FILE_DESTand
F.DB_FLASHBACK_RETENTION_TARGET
第2题:
第3题:
对于以下代码描述有误的是? val data = Map(1 -> "One", 2 -> "Two") val res = for((k, v) <- data; if(k > 1)) yield v
A.运行后res的结果为List("Two")
B.运行后res的结果为List("One", "Two")
C.对映射data中的每一个(键,值)对,k被绑定对键,而v则被绑定到值
D.其中的if(k > 1)是一个守卫表达式
第4题:
A. Cisco Smart Foundation Service
B. SMARTnet Partner Service
C. Cisco Smart Care Service
D. Cisco Technical Assistance Center
E. CiscoSMARTnet for SBCS
第5题:
第6题:
1. 创建并访问DataFrame对象。 1) 创建3×3DataFrame数据对象:数据内容为1-9;行索引为字符a,b,c;列索引为字符串‘one’,‘two’,‘three’; 2) 查询列索引为‘two’和‘three’两列数据; 3) 查询第0行、第2行、第0列、第2列数据; 4) 筛选第1列中值大于2的所有行数据,另存为data1对象; 5) 为data1添加一列数据,列索引为‘four’,值都为10; 6) 将data1所有值大于9的数据修改为8; 7) 删除data1中第0行和第1行数据。