-
To enable faster incremental backups, you enabled block change tracking for the database.Which two statements are true about the block change tracking file?（）
A . Multiple change tracking files can be created for a database.
B . The change tracking file must be created after the first level 0 backup.
C . RMAN does not support backup and recovery of the change tracking file.
D . The database clears the change tracking file and starts tracking changes again, after whole database restore and recovery operations.
-
You execute the following command to enable a session in resumable mode： SQL> ALTER SESSION ENABLE RESUMABLE TIMEOUT 60； What is the impact of a timeout on the statements being suspended？（）
A . The statements remain suspended for at least 60 seconds.
B . The statements are suspended for 60 seconds and then they are executed.
C . The suspended statements error out if the problem is not rectified within 60 seconds.
D . The statements are automatically suspended 60 seconds after an error is received， and then attempt to execute normally again.
-
If class Donkey2 is invoked twice， the first time without assertions enabled， and the second time with assertions enabled， what are the results？（）https://assets.asklib.com/images/image2/201808011449038812.jpg
A . no output
B . no output assert is on
C . assert is on
D . no output ， An Assertion Error is thrown.
E . assert is on ， An AssertionError is thrown.
-
Given:
https://assets.asklib.com/images/image2/2018080210324760785.jpg
If class Donkey is invoked twice, the first time without assertions enabled, and the second time with assertions enabled, what are the results?（）
A . no output
B . no output assert is on
C . assert is on
D . no output An AssertionError is thrown.
E . assert is on An AssertionError is thrown.
-
You have configured OMF in your database. You enabled the ALTER DATABASE ENABLE BLOCK CHANGE TRACKING； statement to enable the block change tracking feature. What information will be written in the change tracking file？（）
A . the system change number
B . the locations of the redo log files
C . the locations of the datafiles
D . the physical location of all the database change
-
You want to enable resumable space allocation at the instance level.Which two actions would enable resumable space allocation at the instance level?（）
A . issuing the ALTER SYSTEM ENABLE RESUMABLE; statement
B . issuing the ALTER SESSION ENABLE RESUMABLE; statement
C . modifying the RESUMABLE_TIMEOUT initialization parameter to a nonzero value
D . issuing the ALTER SYSTEM SET RESUMABLE_TIMEOUT=<nonzero value>; statement
-
What are the prerequisites for enabling Flashback Database？ （）
A . The database must be started in the MOUNT EXCLUSIVE state.
B . The database must have multiplexed control files.
C . The database must be opened by using a text-based parameter file instead of a server parameter file （SPFILE）.
D . The database must be in ARCHIVELOG mode.
E . The database must be in the NOMOUNT state.
F . The database must be opened in RESTRICTED mode.
-
Given:
https://assets.asklib.com/images/image2/2018080209371645309.jpg
If class Donkey is invoked twice, the first time without assertions enabled, and the second time with assertions enabled, what are the results?（）
A . no output
B . no output assert is on
C . assert is on
D . no output An AssertionError is thrown.
E . assert is on An AssertionError is throw
-
Which command will enable the administrator toquery the current network adapter configuration?（）
A . netstat -v
B . entstat -d
C . lsattr -El
D . lsdev -C -attr
-
When is the connection concentrator enabled?（）
A . When the value of MAX_CONNECTIONS is greater than the value of MAX_COORDAGENTS.
B . When the value of MAX_AGENTS is greater than the value of MAX_CLIENTS.
C . When the value of NUM_AGENTS is greater than the value of MAX_AGENTS.
D . When the value of NUM_CONNECTIONS is greater than the value of NUM_COORDAGENTS.
-
Where do you enable the CRS engine?（）
A . Publisher Activation page
B . Component Activation page
C . Cluster Setup page
D . Server Setup page&e
-
To enable faster incremental backups, you enabled block change tracking for the database.Which two statements are true about the block change tracking file? （）(Choose two.)
A . Multiple change tracking files can be created for a database.
B . The change tracking file must be created after the first level 0 backup.
C . RMAN does not support backup and recovery of the change tracking file.
D . The database clears the change tracking file and starts tracking changes again, after whole database restore and recovery operations.
-
You enabled Flashback Data Archive on the INVENTORY table. Which DDL operation is supported on the table after enabling Flashback Data Archive？（）
A . Drop the table.
B . Partition the table.
C . Truncate the table.
D . Add a column to the table.
E . Rename a column in the table.
-
You execute the following command to enable a session in resumable mode： SQL> ALTER SESSION ENABLE RESUMABLE TIMEOUT 60; What is the impact of a timeout on the statements being suspended？（）
A . The statements remain suspended for at least 60 seconds.
B . The statements are suspended for 60 seconds and then they are executed.
C . The suspended statements error out if the problem is not rectified within 60 seconds.
D . The statements are automatically suspended 60 seconds after an error is received， and then attempt to execute normally again.
-
To enable faster incremental backups， you enabled block change tracking for the database. Which two statements are true about the block change tracking file？（）
A . Multiple change tracking files can be created for a database.
B . The change tracking file must be created after the first level 0 backup.
C . RMAN does not support backup and recovery of the change tracking file.
D . The database clears the change tracking file and starts tracking changes again，after whole database restore and recovery operations.
-
You execute the following command to enable a session in resumable mode： SQL> ALTER SESSION ENABLE RESUMABLE TIMEOUT 60； What is the impact of a timeout on the statements being suspended？（）
A . The statements remain suspended for at least 60 seconds.
B . The statements are suspended for 60 seconds and then they are executed.
C . The suspended statements error out if the problem is not rectified within 60 seconds.
D . The statements are automatically suspended 60 seconds after an error is received， and then attempt toexecute normally again.
-
You want to enable resumable space allocation at the instance level.Which two actions would enable resumable space allocation at the instance level? （）(Choose two.)
A . issuing the ALTER SYSTEM ENABLE RESUMABLE; statement
B . issuing the ALTER SESSION ENABLE RESUMABLE; statement
C . modifying the RESUMABLE_TIMEOUT initialization parameter to a nonzero value
D . issuing the ALTER SYSTEM SET RESUMABLE_TIMEOUT=
-
The enableModifiedFlag enables which of the following？（）
A . User initiated edit document command
B . Silent navigation from an edited page
C . User initiated save command
D . Removal of a locked for editing statu
-
You want to enable resumable space allocation at the instance level. Which two actions would enable resumable space allocation at the instance level？（）
A . issuing the ALTER SYSTEM ENABLE RESUMABLE；statement
B . issuing the ALTER SESSION ENABLE RESUMABLE；statement
C . modifying the RESUMABLE_TIMEOUT initialization parameter to a nonzero value
D . issuing the ALTER SYSTEM SET RESUMABLE_TIMEOUT=
-
A constraint in a table is defined with the INITIALLY IMMEDIATE clause. You executed the ALTER TABLE command with the ENABLE VALIDATE option to enable the constraint that was disabled. What are the two effects of this command？（）
A . It fails if any existing row violates the constraint.
B . It does not validate the existing data in the table.
C . It enables the constraint to be enforced at the end of each transaction.
D . It prevents insert， update， and delete operations on the table while the constraint is in the process of being enabled.
-
A constraint in a table is defined with the INITIALLY IMMEDIATE clause. You executed the ALTER TABLEcommand with the ENABLE VALIDATE option to enable the constraint that was disabled. What are the twoeffects of this command（）
A . It fails if any existing row violates the constraint.
B . It does not validate the existing data in the table.
C . It enables the constraint to be enforced at the end of each transaction.
D . It prevents insert， update， and delete operations on the table while the constraint is in the process of beingenabled
-
Vitamin B enables the body tofull use of the food taken in.
-
The most visible victims of pollution, fish, are only a link in a chain from microscopic life to man.
A．鱼是最显而易见的污染受害者，但它只不过是从微生物到人类这一长链中的一环罢了。
B．在从微生物到人类这一长链中，鱼是污染的唯一受害者，而且是最容易看见的。
C．污染影响着所有的生物界，但鱼是最显而易见的受害者。
D．最明显的污染受害者们构成了从微生物到人类的长链，而鱼则仅仅是其中的一环。
-
2、显微镜用完后，以下操作不对的是： Which operation below is incorrect after finishing the use of microscope
A．要将光源亮度调至最低 Minimize the brightness of the light source
B．将四倍镜头对准镜台孔 Aim the 4x lens at the aperture of mirror stage
C．降低镜台，降下聚光器 Lower the stage, lower the concentrator
D．关闭光圈，盖好防尘罩 Close the aperture and cover the microscope with dust cover
