orcacle9i database:new features for administrators
- Exam Number/Code : 1z0-030
- Exam Name : orcacle9i database:new features for administrators
- Questions and Answers : 120 Q&As
- Update Time: 2013-04-05
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Exam : Oracle 1Z0-030
Title : Orcacle9i DataBase:New Features for Administrators
1. Which two statements are true regarding the use of UTF-16 encoding? (Choose two.)
A. enables easier loading of multinational data
B. uses a fixed-width multibyte encoding sequence
C. Asian characters are represented in three characters
D. uses a variable-width multibyte encoding sequence
E. European characters are represented in one or two bytes
2. In what way are the two initialization parameters PGA_AGGREGATE_TARGET and WORKAREA_SIZE_POLICY related to each other?
A. The default value for PGA_AGGREGATE_TARGET depends on the setting of WORKAREA_SIZE_POLICY.
B. You must provide a nondefault value for PGA_AGGREGATE_TARGET before setting WORKAREA_SIZE_POLICY to the value AUTO.
C. The value of PGA_AGGREGATE_TARGET can only be changed dynamically (that is, when the instance is open) if the value of WORKAREA_SIZE_POLICY is set to AUTO.
D. You must provide a non-default value for PGA_AGGREGATE_TARGET before setting WORKAREA_SIZE_POLICY to the value MANUAL.
3. What is true about version-enabled tables?
A. The unit of versioning is the schema.
B. It is possible to version enable a table pertaining to SYS.
C. There are as many segments as versions for the same base table.
D. It is possible to create workspaces if there is no version-enabled table in the database.
4. Your database has tablespaces with different block sizes. What must you do to back these up with RMAN?
A. You need to issue a separate RMAN BACKUP command to group tablespaces with the same block size.
B. You need to use RMAN BACKUP BLOCKSIZE=nK to select tablespaces that are not the same size as the standard block size.
C. You can simply issue the RMAN BACKUP command, because a backup set can contain tablespaces of different block sizes.
D. You must allow for the fact that RMAN will generate several backupsets, one for each block size, when you issue the RMAN BACKUP command .
5. What is the meaning of using "character semantics" to create a table?
A. You use only use CHAR data types.
B. All columns are a single character wide.
C. You use single letter names of all columns.
D. You specify the width of a column in characters, not in bytes.
E. You use only character type data types (CHAR, NCHAR, VARCHAR2, NVARCHAR2, CLOB, NCLOB).
6. You can use Oracle Flashback to look at past activity in your database. What are two other characteristics of Oracle Flashback? (Choose two.)
A. Oracle Flashback uses undo information to construct consistent data.
B. You can use a PL/SQL cursor opened while using an Oracle Flashback image to perform DML once you deactivate Oracle Flashback in your session.
C. You can only use an Oracle Flashback view of the data if the required records are still in the online redo log files.
D. Oracle Flashback lists the DML that was executed during the period you identify when initiating your session.
7. What is true regarding a transaction executed in Automatic Undo Management mode?
A. It is possible for the transaction to span different undo segments.
B. It is possible for the transaction to reuse inactive extents from another undo segment.
C. It is possible for the transaction to use inactive extents from another undo tablespace.
D. It is possible for the transaction to extend the undo tablespace, even if defined with AUTOEXTENSIBLE set to FALSE.
8. What does the Metadata Application Programming Interface (API) allow you to do?
A. repair damaged data dictionary entries
B. delete data dictionary information about database objects you no longer need
C. extract data definition commands from the data dictionary in a variety of formats
D. prepare pseudocode modules for conversion to Java or PL/SQL programs with a Metadata code generator
9. Which three resource plan parameters are used to enable Automatic Consumer Group Switching to estimate job execution times automatically, and to perform a switch to a low priority consumer group before they are initiated? (Choose three.)
10. Consider this syntax: MERGE INTO t1 USING t2 ON (join predicate)?. What does the MERGE syntax do?
A. It performs a merge join of the row from T2 only if it doesn't exist in the T1 table.
B. It creates a natural join of tables T1 and T2 for all columns that have the same name.
C. It creates a Cartesian product of table T1 and table T2 for all columns that have the same name.
D. For each row from T2, it updates the row if it exists within table T1, otherwise it inserts the row into T1.
11. A bitmap join index is defined as _____.
A. an index used to join two bitmap indexes on a table
B. a bitmap index created for the join of two or more tables
C. a bitmap index created on the join of two or more indexes
D. a bitmap index created on the join of two or more indexed-organized tables
12. What statement is true about taking a database default temporary tablespace offline?
A. You cannot take a default temporary tablespace offline.
B. The database must be quiesced before you perform this action.
C. You must ensure that all users are assigned to an alternative temporary tablespace first.
D. You must first ensure that the default temporary tablespace has the permanent tablespace characteristic.
13. What is the benefit of the Cached Execution Plan feature?
A. SQL statement performance is improved.
B. The SQL statement no longer needs to be cached in the library cache.
C. Improved diagnosability, as the execution plan of a cached SQL statement in memory is preserved.
D. The execution plan is available for diagnosis after the SQL statement is aged out of the library cache.
14. Online index rebuild functionality has been extended to include which four index structures? (Choose four.)
A. bitmap indexes
B. reverse key indexes
C. function-based indexes
D. key-compressed indexes on regular tables
E. key-compressed indexes on IOT (including secondary indexes)