問題文
A reporting team will run queries against a physical standby while the primary keeps sending redo. The administrator opens the standby read only and keeps the apply process running. What does that combination deliver?
選択肢
- Queries see data that keeps advancing because the apply process continues to move changes into the data files while the sessions read them
- Queries see data frozen at the moment the database opened because the apply process holds the changes in memory while the sessions read the files
- Queries see data assembled on demand because the apply process converts the changes into statements while the sessions read the results
- Queries see data taken from the primary because the apply process forwards each request over the network while the sessions wait for a reply