题目内容（请给出正确答案）

[主观题]

Which type of backup contains only the blocks that have changed since the last level 0 incremental backup？（）

A. a cumulative level 1 backup

B. a differential level 1 backup

C. a full backup

D. a whole backup

提问人：网友hhhh7123 发布时间：2022-01-07

参考答案

查看官方参考答案

如搜索结果不匹配，请联系老师获取答案

您可能会需要：

重置密码查看订单联系客服

安装简答题APP，拍照搜题省时又省心！

更多“Which type of backup contains …”相关的问题

第1题

Which type of the backup process backs up files that have been modified since the last tim

e all data was backed up？(72 )

A.Incremental backup

B.Full backup

C.Partial backup

D.Differential backup

点击查看答案

第2题

Which of the following best explains why a type 3 filter was selected for experiments 2

and 3？

A.The frequency response varied more widely when filter type 3 was used than when either Filter type 1 or Filter type 2 was used.

B.Filter type 3 contains a ground and was therefore the safest of the three types of filters to experiment with.

C.Filter type 3 is the only one among the three that contains an inductor.

D.Input voltage could be more easily regulated using a type 3 filter than using either a type 1 or type 2 filter.

点击查看答案

第3题

Which type of newspaper contains a number of entertainment and advertising supplements？A．A

Which type of newspaper contains a number of entertainment and advertising supplements？

A．A morning paper.

B．A campus newspaper.

C．An evening paper.

D．A Sunday newspaper.

点击查看答案

第4题

Which three statements about subqueries are true?()

A. A single row subquery can retrieve only one column and one row.

B. A single row subquery can retrieve only one row but many columns.

C. A multiple row subquery can retrieve multiple rows and multiple columns.

D. A multiple row subquery can be compared by using the ">" operator.

E. A single row subquery can use the IN operator.

F. A multiple row subquery can use the "=" operator.

点击查看答案

第5题

You have not configured Oracle Managed Files (OMF) in your database. You do not want to scan the entire datafile every time an incremental backup is performed. You decide to enable the block change tracking feature.Which statement should you use to enable the block change tracking feature?（）

A. ALTER DATABASE ENABLE BLOCK CHANGE TRACKING

B. ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING USING FILE

C. ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE

D. ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING

点击查看答案

第6题

You enable block change tracking. You issue the following command:BACKUP INCREMENTAL LEVEL 0 DATABASE;The next day, you issue the following command:BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE;Which statement about the use of the change tracking file is true?（）

A. RMAN reads the block change tracking file only when it performs the incremental level 0 backup.

B. RMAN reads the block change tracking file when it performs both incremental backups.

C. RMAN reads the block change tracking file only when it performs the incremental level 1 backup.

D. RMAN does not read the block change tracking file when it performs either incremental backup.

点击查看答案

第7题

You discover that your Recycle Bin contains two tables with the same name, MY_TABLE. You also have a table named MY_TABLE in your schema.You execute the following statement:FLASHBACK TABLE my_table TO BEFORE DROP RENAME TO my_table2;What will be the result of executing this statement?（）

A. One of the tables is recovered from the Recycle Bin using a First In First Out (FIFO) approach.

B. One of the tables is recovered from the Recycle Bin using a Last In First Out (LIFO) approach.

C. Both the tables are recovered from the Recycle Bin with one table renamed to MY_TABLE2 and the other to a system-generated name.

D. None of the tables are recovered from the Recycle Bin, and the statement returns an error.

点击查看答案

第8题

Which operator can be used with a multiple-row subquery? ()

A. =

B. LIKE

C. BETWEEN

D. NOT IN

E. IS

F. <>

点击查看答案

第9题

You need to display the last names of those employees who have the letter "A" as the second character in their names. Which SQL statement displays the required results? ()

A. SELECT last_name FROM EMP WHERE last_ name LIKE ‘_A%‘;

B. SELECT last_name FROM EMP WHERE last name =‘*A%‘

C. SELECT last_name FROM EMP WHERE last name =‘_A%‘;

D. SELECT last_name FROM EMP WHERE last name LIKE ‘*A%‘

点击查看答案