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NEW QUESTION 44
You execute the following piece of code with appropriate privileges:
User SCOTT has been granted the CREATE SESSION privilege and the MGR role.
Which two statements are true when a session logged in as SCOTT queries the SAL column in the view and the table? (Choose two.)
- A. Data is never redacted for the EMP_V.SAL column.
- B. Data is redacted for the EMP_V.SAL column only if the SCOTT session has the MGR role set.
- C. Data is redacted for the EMP.SAL column only if the SCOTT session does not have the MGR role set.
- D. Data is redacted for the EMP_V.SAL column only if the SCOTT session does not have the MGR role set.
- E. Data is redacted for EMP.SAL column only if the SCOTT session has the MGR role set.
Answer: A,C
Explanation:
Note:
* DBMS_REDACT.FULL completely redacts the column data.
* DBMS_REDACT.NONE applies no redaction on the column data. Use this function for development testing purposes. LOB columns are not supported.
* The DBMS_REDACT package provides an interface to Oracle Data Redaction, which enables you to mask (redact) data that is returned from queries issued by low-privileged users or an application.
* If you create a view chain (that is, a view based on another view), then the Data Redaction policy also applies throughout this view chain. The policies remain in effect all of the way up through this view chain, but if another policy is created for one of these views, then for the columns affected in the subsequent views, this new policy takes precedence.
NEW QUESTION 45
You notice a performance change in your production Oracle database and you want to know which change has made this performance difference.
You generate the Compare Period Automatic Database Diagnostic Monitor (ADDM) report to further investigation.
Which three findings would you get from the report? (Choose three.)
- A. It shows the resource usage for CPU, memory, and I/O in both time periods.
- B. It identifies any workload change that caused a performance difference in both time periods.
- C. It detects the top wait events causing performance degradation.
- D. It detects any configuration change that caused a performance difference in both time periods.
- E. It shows the difference in the size of memory pools in both time periods.
- F. It gives information about statistics collection in both time periods.
Answer: A,B,D
Explanation:
Explanation/Reference:
Explanation:
Keyword: shows the difference.
* Full ADDM analysis across two AWR snapshot periods
Detects causes, measure effects, then correlates them
Causes: workload changes, configuration changes
Effects: regressed SQL, reach resource limits (CPU, I/O, memory, interconnect) Makes actionable recommendations along with quantified impact
* Identify what changed
/Configuration changes, workload changes
* Performance degradation of the database occurs when your database was performing optimally in the past, such as 6 months ago, but has gradually degraded to a point where it becomes noticeable to the users. The Automatic Workload Repository (AWR) Compare Periods report enables you to compare database performance between two periods of time.
While an AWR report shows AWR data between two snapshots (or two points in time), the AWR Compare Periods report shows the difference (ABE) between two periods (or two AWR reports with a total of four snapshots). Using the AWR Compare Periods report helps you to identify detailed performance attributes and configuration settings that differ between two time periods.
NEW QUESTION 46
Examine the command to perform a data pump export operation on a source database:
$> expdp hr/hr DIRECTORY=dumpdir DUMPFILE=emp1.dmp VIEWS_AS_TABLE=emp_dept
On the target database, you execute the data pump import command:
$> impdp hr/hr DIRECTORY=dumpdir DUMPFILE=emp1.dmp VIEWS_AS_TABLE=emp_dept
Which three statements are true? (Choose three.)
- A. The expdp operation exports data that satisfies the condition of the defining query used to create the EMP_DEPT view.
- B. The impdp operation creates the view and dependent objects.
- C. All rows from the dependent objects, along with the metadata required to create the EMP_DEPT view, are exported.
- D. Objects dependent on the EMP_DEPT view are exported.
- E. The impdp operation creates EMP_DEPT as table and populates it with the data from the export dump file.
Answer: A,D,E
NEW QUESTION 47
Which set of statements is true about data dictionary views?
1. They are stored in the SYSTEM tablespace.
2. They are based on virtual tables.
3. They are owned by the SYS user.
4. They can be queried by a normal user only if the 07_DICTIONARY_ACCESSIBILITY parameter is set to TRUE.
5. The V$FIXED_TABLE view can be queried to list the names of these views.
6. They are owned by the SYSTEM user.
- A. 1 and 3
- B. 1, 2, and 3
- C. 2, 3, 4, and 5
- D. 2, 5, and 6
Answer: A
Explanation:
References:
https://docs.oracle.com/cd/E11882_01/server.112/e40540/datadict.htm#CNCPT002
NEW QUESTION 48
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