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QUESTION NO: 1
You are the DBA supporting an Oracle 11g Release 2 database and wish to move a table containing several DATE, CHAR, VARCHAR2, and NUMBER data types, and the table's indexes, to another tablespace.
The table does not have a primary key and is used by an OLTP application.
Which technique will move the table and indexes while maintaining the highest level of availability to the application?
A. An ALTER TABLE MOVE to move the table and ALTER INDEX REBUILD to move the indexes.
B. Oracle Data Pump.
C. Edition-Based Table Redefinition.
D. Online Table Redefinition.
E. An ALTER TABLE MOVE to move the table and ALTER INDEX REBUILD ONLINE to move the indexes.
Answer: D
Explanation
* Oracle Database provides a mechanism to make table structure modifications without significantly affecting the availability of the table. The mechanism is called online table redefinition. Redefining tables online provides a substantial increase in availability compared to traditional methods of redefining tables.
* To redefine a table online:
Choose the redefinition method: by key or by rowid
* By key-Select a primary key or pseudo-primary key to use for the redefinition. Pseudo-primary keys are unique keys with all component columns having NOT NULL constraints. For this method, the versions of the tables before and after redefinition should have the same primary key columns. This is the preferred and default method of redefinition.
* By rowid-Use this method if no key is available. In this method, a hidden column named M_ROW $ $ is added to the post-redefined version of the table. It is recommended that this column be dropped or marked as unused after the redefinition is complete. If COMPATIBLE is set to 10.2.0 or higher, the final phase of redefinition automatically sets this column unused. You can then use the ALTER TABLE
... DROP UNUSED COLUMNS statement to drop it.
You cannot use this method on index-organized tables.
Note:
* When you rebuild an index, you use an existing index as the data source. Creating an index in this manner enables you to change storage characteristics or move to a new tablespace. Rebuilding an index based on an existing data source removes intra-block fragmentation. Compared to dropping the index and using the CREATE INDEX statement, re-creating an existing index offers better performance.
Incorrect:
Not E: Edition-based redefinition enables you to upgrade the database component of an application while it is in use, thereby minimizing or eliminating down time.
QUESTION NO: 2
You configured the flash recovery area in the database. Which two files would you expect to find in the flash recovery area? (Choose two.)
A. copies of all parameter files
B. trace file generated using BACKUP CONTROLFILE TO TRACE
C. backup pieces
D. control file autobackups
Answer: C,D
QUESTION NO: 3
The HR schema exists in two databases, BOSTON and DENVER, and has the same password,
HR.
You have the CREATE DATABASE LINK and CREATE SESSION privileges on both the database.
BOSTON is defined as a service name in the tnsnames.ora of both the databases.
You plan to use the command:
CREATE DATABASE LINK hr_link CONNECT to hr IDENTIFIED BY hr USING 'denver'; What must be done to ensure only the HR user in the BOSTON database can access the HR schema in the DENVER database?
A. Execute this command as HR user in the BOSTON database.
B. Execute this command as HR user in the BOSTON database and SYS user in the DENVER database.
C. Execute this command as HR user in the DENVER database.
D. Execute this command as SYS user in both the databases.
Answer: A
QUESTION NO: 4
In your database, the STATISTICS_LEVEL parameter is set to TYPICAL and an Automatic
Workload Repository (AWR) snapshot is taken every 30 minutes.
Which two statements are true about the Automatic Database Diagnostic Monitor (ADDM)? (Choose two.)
A. It runs after each AWR snapshot is created and it requires at least two snapshots for analysis.
B. It calls other advisors if required, but does not provide recommendations about the advisors to be used.
C. It always compares the latest snapshot with the baseline snapshot for analysis.
D. It requires at least four AWR snapshots for analysis.
E. It measures database performance by analyzing the wait time and CPU time of all non-idle user sessions.
Answer: A,E
QUESTION NO: 5
What is pre-requisite to alter a role?
A. You should set the OS_ROLES parameter to true.
B. You should be granted the DBA role.
C. You should have the ALTER ANY ROLE system privilege.
D. You should be granted the role with the GRANT OPTION.
Answer: C
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Updated: May 28, 2022