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单选题
AUM has been retaining about 15 minutes worth of undo. You want to double the retentionperiod， but not at the expense of new transactions failing. You decide to alter the system to set the parameter UNDO_RETENTION=18000. However， AUM still retains only about 15 minutes worth of undo. What is the problem？ （）
A
You need to alter the undo tablespace to add the RETENTION GUARANTEE setting.
B
You need to increase the size of the undo tablespace.
C
The undo tablespace is not set to auto-extend.
D
You need to alter the Recycle Bin to add the RETENTION GUARANTEE setting.
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更多 “单选题AUM has been retaining about 15 minutes worth of undo. You want to double the retentionperiod， but not at the expense of new transactions failing. You decide to alter the system to set the parameter UNDO_RETENTION=18000. However， AUM still retains only about 15 minutes worth of undo. What is the problem？ （）A You need to alter the undo tablespace to add the RETENTION GUARANTEE setting.B You need to increase the size of the undo tablespace.C The undo tablespace is not set to auto-extend.D You need to alter the Recycle Bin to add the RETENTION GUARANTEE setting.” 相关考题
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Passage Three
Americans are well known for the strange diets they always seem to be following．It seems that Americans like to diet almost as much as they like to eat．New types of diet plans are always coming out．Usually,though,they don't stay popular for long．
There are many diets on the market．It is often difficult to know which ones really work．It's also hard to believe how fast a dieter is supposed to shed pounds．A lot has been written about dieting．And some interesting facts about diets and foods have been discovered．
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Some dieters even worry about getting fat from licking postage stamps．But they have nothing to worry about．The glue on an average stamp has only about one-tenth of a calorie．Maybe a diet of post-age stamps would be popular?
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Passage Three
Americans are well known for the strange diets they always seem to be following．It seems that Americans like to diet almost as much as they like to eat．New types of diet plans are always coming out．Usually,though,they don't stay popular for long．
There are many diets on the market．It is often difficult to know which ones really work．It's also hard to believe how fast a dieter is supposed to shed pounds．A lot has been written about dieting．And some interesting facts about diets and foods have been discovered．
For example,did you know that the more celery you eat,the more weight you will lose?Celery has“negative”calories．The body burns up more calories digesting a piece of celery than there are in the celery stick itself．
Dieters?shun?potatoes because they think they are fattening．But they aren't．A potato has about the same number of calories as an apple．To gain a single pound,you would have to eat eleven pounds of potatoes!
Some dieters even worry about getting fat from licking postage stamps．But they have nothing to worry about．The glue on an average stamp has only about one-tenth of a calorie．Maybe a diet of post-age stamps would be popular?
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B.vegetables are not fattening
C.it has“negative”calories
D.it is easy to digest
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单选题AUM has been retaining about 15 minutes worth of undo. You want to double the retentionperiod， but not at the expense of new transactions failing. You decide to alter the system to set the parameter UNDO_RETENTION=18000. However， AUM still retains only about 15 minutes worth of undo. What is the problem？ （）A
You need to alter the undo tablespace to add the RETENTION GUARANTEE setting.B
You need to increase the size of the undo tablespace.C
The undo tablespace is not set to auto-extend.D
You need to alter the Recycle Bin to add the RETENTION GUARANTEE setting.
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单选题Initially， for the Automatic Workload Repository （AWR） statistics，the retention period is set to 7 days， the collection interval is set to 30 minutes and the collection level is set to Typical in your production database. You have been using the Memory Advisor for the last three months to generate recommendations for tuning memory components. However，when you observe the Memory Advisor on a Friday，you find that the statistics are available only for two days， Thursday and Friday，of that week. What would have caused the statistics to be removed？（）A
On Wednesday， the statistics have been purged.B
On Wednesday， the retention period has been set to zero.C
On Wednesday， the collection interval has been set to zero.D
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On Wednesday， the retention period has been set to one day.F
On Wednesday， the retention period has been set to two daysG
On Wednesday, the collection level has been changed to Typical.H
On Wednesday, the collection interval has been set to 1440 minutes.
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考题
问答题Practice 2 You should spend about 40 minutes on this task. Write about the following topic: Some people think that the detailed criminal description on newspaper and TV has bad influences, so this kind of information should be restricted on the media. To what extent do you agree or disagree? You should write at least 250 words.
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