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What determines which bits in an IP address represent the subnet, and which represent the host?
What can you do with the DBMS_LOB package?
A. Use the DBMS_LOB.WRITE procedure to write data to a BFILE.
B. Use the DBMS_LOB.BFILENAME function to locate an external BFILE.
C. Use the DBMS_LOB.FILEEXISTS function to find the location of a BFILE.
D. Use the DBMS_LOB.FILECLOSE procedure to close the file being accessed.
Examine the parameters for your database instance:
————————– ——————————- —————————
undo_management string AUTO
undo_retentioninteger 12 00
undo_tablespace string UNDOTBS1
You execute the following command:
SQL> ALTER TABLESPACE undotbs1 RETENTION NOGUARANTEE;
Which statement is true in this scenario?
A. Undo data is written to flashback logs after 1200 seconds.
B. Inactive undo data is retained for 1200 seconds even if subsequent transactions fail due to lack of space in the undo tablespace.
C. You can perform a Flashback Database operation only within the duration of 1200 seconds.
D. An attempt is made to keep inactive undo for 1200 seconds but transactions may overwrite the undo before that time has elapsed.
You need to create a table for a banking application. One of the columns in the table has the following requirements:
1) You want a column in the table to store the duration of the credit period.
2) The data in the column should be stored in a format such that it can be easily added and subtracted with date data type without using conversion functions.
3) The maximum period of the credit provision in the application is 30 days.
4) The interest has to be calculated for the number of days an individual has taken a credit for.
Which data type would you use for such a column in the table?
D. INTERVAL DAY TO SECOND
E. INTERVAL YEAR TO MONTH
You notice that the performance of your production 24/7 Oracle database significantly degraded. Sometimes you are not able to connect to the instance because it hangs. You do not want to restart the database instance.
How can you detect the cause of the degraded performance?
A. Enable Memory Access Mode, which reads performance data from SGA.
B. Use emergency monitoring to fetch data directly from SGA analysis.
C. Run Automatic Database Diagnostic Monitor (ADDM) to fetch information from the latest Automatic
Workload Repository (AWR) snapshots.
D. Use Active Session History (ASH) data and hang analysis in regular performance monitoring.
E. Run ADDM in diagnostic mode.
*In most cases, ADDM output should be the first place that a DBA looks when notified of a performance problem.
*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 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.
Reference:Resolving Performance Degradation Over Time
As part of archiving the historical data, you want to transfer data from one database to another database, which is on another server. All tablespaces in the source database are read/write and online. The source and target databases use the same compatibility level and character sets. View the Exhibit and examine the features in the source and target database.
Which of the following steps are required to transport a tablespace from the database to the target database:
1.Make the tablespace read-only at the source database.
2.Export metadata from the source database.
3.Convert data filed by using Recovery Manager (RMAN).
4.Transfer the dump file and data filed to the target machine.
5.Import metadata at the target database.
6.Make the tablespace read/write at the target database.
A. 2, 4, and 5
B. All the steps
C. 2, 3, 4 and 5
D. 1, 2, 4, 5 and 6
If both platforms have the same endianness, no conversion is necessary. Otherwise you must do a conversion of the tablespace set either at the source or destination database.
Which two statements correctly describe the relation between a data file and the logical database structures? (Choose two.)
A. An extent cannot spread across data files.
B. A segment cannot spread across data files.
C. A data file can belong to only one tablespace.
D. A data file can have only one segment created in it.
E. A data block can spread across multiple data files as it can consist of multiple operating system (OS)
Evaluate the following CREATE TABLE commands:
CREATE TABLE orders
(ord_no NUMBER(2) CONSTRAINT ord_pk PRIMARY KEY,
CREATE TABLE ord_items
qty NUMBER(3) CHECK (qty BETWEEN 100 AND 200),
expiry_date date CHECK (expiry_date > SYSDATE),
CONSTRAINT it_pk PRIMARY KEY (ord_no,item_no),
CONSTRAINT ord_fk FOREIGN KEY(ord_no) REFERENCES orders(ord_no));
The above command fails when executed. What could be the reason?
A. SYSDATE cannot be used with the CHECK constraint.
B. The BETWEEN clause cannot be used for the CHECK constraint.
C. The CHECK constraint cannot be placed on columns having the DATE data type.
D. ORD_NO and ITEM_NO cannot be used as a composite primary key because ORD_NO is also
the FOREIGN KEY.
The CHECK constraint defines a condition that each row must satisfy. The condition can use the same constructs as the query conditions, with the following exceptions:
References to the CURRVAL, NEXTVAL, LEVEL, and ROWNUM pseudocolumns Calls to SYSDATE, UID, USER, and USERENV functions
Queries that refer to other values in other rows
A single column can have multiple CHECK constraints that refer to the column in its definition. There is no limit to the number of CHECK constraints that you can define on a column. CHECK constraints can be defined at the column level or table level.
CREATE TABLE employees
salary NUMBER(8,2) CONSTRAINT emp_salary_min
CHECK (salary > 0),
Which statement is true about the object model?
A. dmr_content is not a sub-type of dm_sysobject although sysobject contents are stored as dmr_content objects.
B. dm_acl objects are stored in the System cabinet.
C. Not all sysobjects can have associated permissions.
D. Virtual documents are objects of type dm_relation that describe a parent/child relationship between objects.
Oracle Web Services Manager uses an agent-based approach to providing Web Services security. Where are these agents deployed?
A. In any IPv4 of Later network firewall
B. In the Oracle WebLogic Server Web Service request Interceptors
C. In the Oracle Service Bus proxy pipeline
D. In the Oracle Access Manager web gate
E. In the Oracle WebLogic Server access gate