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NEW QUESTION 30
Which three statements are true about Flashback Database?
- A. Flashback Database can recover a data file that was dropped during the span of time of the flashback.
- B. Flashback logs are used to restore to the blocks’ before images, and then the redo data may be used to roll forward
to the desired flashback time. - C. Flashback Database can recover a database to the state that it was in before a reset logs operation.
- D. Flashback logs are written sequentially, and are archived.
- E. Flashback Database uses a restored control file to recover a database.
- F. The Oracle database automatically creates, deletes, and resides flashback logs in the Fast Recovery Area.
Answer: B,E,F
Explanation:
* Flashback Database uses its own logging mechanism, creating flashback logs and storing them in the fast recovery
area (C). You can only use Flashback Database if flashback logs are available. To take advantage of this feature, you
must set up your database in advance to create flashback logs.
* To enable Flashback Database, you configure a fast recovery area and set a flashback retention target. This retention
target specifies how far back you can rewind a database with Flashback Database.
From that time onwards, at regular intervals, the database copies images of each altered block in every data file into
the flashback logs. These block images can later be reused to reconstruct the data file contents for any moment at
which logs were captured. (F)
Incorrect:
Not E: You cannot use Flashback Database alone to retrieve a dropped data file. If you flash back a database to a time
when a dropped data file existed in the database, only the data file entry is added to the control file. You can only
recover the dropped data file by using RMAN to fully restore and recover the data file.
References:
NEW QUESTION 31
In your database, USERS is the default permanent tablespace.
Examine the commands and their outcome:
You plan to execute the commands:
Which two statements are true?
- A. The MYTAB table is created in the SYSTEM tablespace but no rows can be inserted into the table by USER02.
- B. The MYTAB table is created in the USERS tablespace but no rows can be inserted into the table by USER02.
- C. The MYTAB table is owned by the SYS user.
- D. The MYTAB table is created in the SYSTEM tablespace and rows can be inserted into the table by USER02.
- E. The CREATE TABLE statement generates an error because the SYSDBA privilege does not provide any space quota
on the SYSTEM tablespace by default.
Answer: C,D
NEW QUESTION 32
In your multitenant container database (CDB) with two pluggable database (PDBs). You want to create a
new PDB by using SQL Developer.
Which statement is true?
- A. The CDB must be in the mount stage.
- B. Alt existing PDBs must be closed.
- C. The CDB must be in the nomount stage.
- D. The CDB must be open.
Answer: D
Explanation:
Explanation/Reference:
Explanation:
* Creating a PDB
Rather than constructing the data dictionary tables that define an empty PDB from scratch, and then
populating its Obj$ and Dependency$ tables, the empty PDB is created when the CDB is created. (Here,
we use empty to mean containing no customer-created artifacts.) It is referred to as the seed PDB and has
the name PDB$Seed. Every CDB non-negotiably contains a seed PDB; it is non-negotiably always open in
read-only mode. This has no conceptual significance; rather, it is just an optimization device. The create
PDB operation is implemented as a special case of the clone PDB operation. The size of the seed PDB is
only about 1 gigabyte and it takes only a few seconds on a typical machine to copy it.
NEW QUESTION 33
You execute this command:
Which two statements are true about segment space management for segments in this tablespace?
- A. The PCTFREEstorage parameter has no effect on segments created in this tablespace.
- B. Segments are automatically shrunk and compressed when rows are deleted.
- C. Space utilization inside segments is mapped by bitmaps.
- D. The PCTUSEDstorage parameter has no effect on segments created in this tablespace.
Answer: C,D
NEW QUESTION 34
……
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