What characteristics make ADSL the likely choice among DSL technologies for Teleworker?（） ["most widely deployed by service providers ","provides asymmetrical bandwidth, including high speed downlink","data rate is affected by distance to the Central Office","provides the furthest reach at T1 speeds ","supports connection of two routers without the use of a DSL access concentrator"]
Which two statements are true about Shared SQL Area and Private SQL Area（） ["Shared SQL Area will be allocated in the shared pool.","Shared SQL Area will be allocated when a session starts.","Shared SQL Area will be allocated in the large pool always.","Private SQL Area will be allocated in the Program Global Area （PGA） always.","Shared SQL Area and Private SQL Area will be allocated in the PGA or large pool.","The number of Private SQL Area allocations is dependent on the OPEN_CURSORS parameter."]
Which two statements are correct about database transportation？（） [" The source and target platforms must be the same"," Redo logs，control files and temp files are also transported"," The transported database must have the same database identifier （DBID） as the source database and cannot be changed"," The COMPATIBLE parameter must be set to 10.0.0.0 or higher and the database must be opened in readonly mode before being transported"," Recovery Manager （RMAN） is used to convert the necessary data files of the database if the target platform is different and has different endian format"]
有一台Y/Y-12接线的变压器，当低压侧BC相短路时，判断下列（）正确。 ["IB=IC，IA=0","IA=IB=IC","IA=IB，IC=0"]
You work as a database administrator for Certkiller .com. According to your backup strategy， you performed an incremental level 0 backup of your database. Which statement regarding this backup is true？（） ["The backup is similar to image copy.","The backup contains all used data blocks.","The backup contains only unused data blocks.","The backup contains all data blocks changed since the last incremental level 1 backup."]
叙述成本法应用的前提条件。
