Restore the 19ths backup， restore all archived redo logs， recover the database to the 20th，and open the database.
Tell them that their request cannot be met with the current backup strategy.
Restore the 19ths backup， apply the online redo logs，and open the database.
Switch the database into ARCHIVELOG mode，restore the 19th’s backup，restore all archived redo logs，and recover the database to the 20th.
Use the recover database command to roll back the database from today to the 19th of the month.
第1题：
Please state why you chose to follow these activities and how they have contributed to your personal development. You may wish to give details of your role whether anyone else was involved and any difficulties you encountered。
第2题：
第3题：
Directions: In this section, you are asked to write a composition with the title “The Biggest Dream of My Life.” You should write at least 120 words and cover the following points.
1. What is your biggest dream? 2. Why do you have it? For how long have you got it? 3. What are your plans to achieve your dream?
参考答案：
The Biggest Dream of My Life I know many people whose biggest dreams are things such as what career they want to get into, how much money they can earn. My dream is nothing like that. My biggest dream has always been and will always be to travel around the world. I have one life here on Earth, so I don’t want to die regretting that I didn’t see it all. Actually I have had this dream ever since I was in primary school. In one geography class, when the teacher presented us the globe and national fl ags of various nations, I thought I found the dream in the depth of my heart. And the moment I came to college, I had always envisioned myself of becoming a nomad. I would roam around the world. No permanent address. Any place can be my home and I am home within myself. Meanwhile, I am aware that it’s really a costly dream. The first step I need to take is to begin to save money to support it. And I think it’s a good idea to start exploration from my hometown and the city where my university is located. Just as a saying goes: a big dream begins with the first step.
第4题：
You work as a database administrator for Certkiller .com. Your database is in NOARCHIVELOG mode. The database has been configured with three redo logs groups， and there have been five log switches. You lost one non-system-critical data file from your database. Which method would you use to recover the data file？（）
第5题：
You have backed up your database twice without connecting to the recovery catalog. What command do you issue to transfer the control-file metadata to the recovery catalog？（）
第6题：
—You work for a small chain of clothing stores. The Managing Director has asked you to write a short report on last month's performance.
—Look at the charts and table below, on which you have already made some handwritten notes.
—Then, using all your handwritten notes, write the report for your Managing Director
—Write 120-140 words.
第7题：
You have lost datafile 4 from your database. Which is typically the fastest way to restore your database？（）
第8题：
You, like many of your classmates, probably have been in such a situation where you are asked to do something to help a foreign friend. (翻译)
第9题：
You are the network administrator of an enterprise company that just deployed a global IP telephony environment. In order to guarantee good voice quality， you asked your provider to implement QoS on the CE routers of your MPLS network. On your LAN， you have also deployed QoS. Users， however， keep complaining about bad voice quality， and the provider does not see matches on the DSCP values that you have asked him to match upon. What is most likely the problem？（）
第10题：
You work as a database administrator for Supportcenter.cn. You are using three database， SupportCenter DB01， SupportCenter DB02， and SupportCenter DB03， on different host machines in your development environment. The database server configuration， such as IP address and listener port number， change frequently due to development requirements， and you have the task of notifying the developers of the changes. Which connection method would you use to overcome this overhead？（）