单选题While designing the database for one of your online transaction processing （OLTP） applications， you want to achieve the following：  a） high availability of data  b） faster primary key access to the table data  c） compact storage for the table  Which ty

第1题：

Your 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、Oracle Data Pump.
• B、An ALTER TABLE MOVE to move the table and ALTER INDEX REBUILD to move the indexes.
• C、An ALTER TABLE MOVE to move the table and ALTER INDEX REBUILD ONLINE to move the indexes.
• D、Online Table Redefinition.
• E、Edition-Based Table Redefinition.

第2题：

You are working in an online transaction processing （OLTP） environment. You realize that the salary for an employee， John， has been accidentally modified in the EMPLOYEES table. Two days ago， the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area.  Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected？（）

• A、perform point-in-time recovery
• B、perform a Flashback Table operation to restore the table to the state it was in two days ago
• C、perform a Flashback Database operation to restore the database to the state it was in two days ago
• D、perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements， and then use them for recovery

第3题：

You plan to move data from a flat file to a table in your database. You decide to use SQL*Loader direct pathload method to perform this task. The table in which you plan to load data is an important table having variousintegrity constraints defined on it.  Which constraints will remain enabled by default during this operation（）

• A、CHECK
• B、UNIQUE
• C、NOT NULL
• D、PRIMARY KEY
• E、FOREIGN KEY

第4题：

You are working in an online transaction processing （OLTP） environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command， the System Change Number （SCN） was 663571. After flashing back the CUSTOMERS table， you realize that the table is not in the correct state and the resultant changes are not what you had desired. So， you need to reverse the effects of the FLASHBACK TABLE command while ensuring that：  a） No other user data in the database is affected.  b） The operation takes the minimum possible time.  Which option would you choose？（）

• A、use the ROLLBACK command with SCN 663571
• B、perform Flashback Transaction Query with SCN 663571
• C、execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571
• D、execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571

第5题：

A support engineer reports that inserting new sales transactions in a SQL Server 2005 database results in an error. You investigate the error. You discover that in one of the databases， a developer has accidentally deleted some data in a table that is critical for transaction processing. The database uses the full recovery model. You need to restore the table. You need to achieve this goal without affecting the availability of other data in the database. What should you do？（）

• A、Back up the current transaction log. Restore the database with a different name and stop at the point just before the data loss. Copy the table back into the original database.
• B、Back up the current transaction log. Restore the database to the point just before the data loss.
• C、Restore the database from the existing backup files to a time just before the data loss.
• D、Restore the database to the point of the last full backup.

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第13题：

In one of your online transaction processing （OLTP） applications， most users frequently modify the values， including the key values， of the application tables. Some users generate application reports by using multiple application tables.  What is the best table structure that you can use to gain optimal performance？（）

• A、heap table
• B、object table
• C、external table
• D、clustered table
• E、global temporary table
• F、index-organized table （IOT）

第14题：

In one of your online transaction processing （OLTP） applications， users are manipulating and querying a database table simultaneously. From the Segment Advisor， you find that one of the tables is highly fragmented and you want to shrink the table immediately without affecting the currently active queries.  Which option would you use with the ALTER TABLE command to achieve this objective？（）

• A、REBUILD
• B、CASCADE
• C、TRUNCATE
• D、ROW MOVEMENT
• E、SHRINK SPACE COMPACT
• F、SHRINK SPACE CASCADE

第15题：

You are using flat files as the data source for one of your data warehousing applications. You plan to move the data from the flat file structures to an Oracle database to optimize the application performance. In your database you have clustered tables. While migrating the data， you want to have minimal impact on the database performance and optimize the data load operation. Which method would you use to load data into Oracle database？（）

• A、use the external table population
• B、use the Oracle Data Pump export and import utility
• C、use the conventional path data load of SQL*Loader utility
• D、use the direct path data load of Oracle export and import utility

第16题：

You work as a database administrator at Certkiller .com. You are working in an online transaction processing （OLTP） environment. You realize that the salary for an employee， John， has been accidentally modified in the EMPLOYEEStable. Two days ago， the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area. Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected？（）

• A、 perform point-in-time recovery
• B、 perform a Flashback Table operation to restore the table to the state it was in two days ago
• C、 perform a Flashback Database operation to restore the database to the state it was in two days ago
• D、 perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements， and then use them for recovery

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