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Oracle database 10g:Administration I Sample Questions:

1. Which two statements are true about a bitmap index? (Choose two.)

A) It can be converted to a B-tree index by using the ALTER INDEX command.
B) Updating the key column locks the whole bitmap segment that contains the bit for the key value to be updated.
C) It has a bitmap segment for each distinct value in the key column, containing a string of bits in which each bit represents the presence or absence of a key column value.
D) It is recommended for the columns that have unique values.

2. While running the Oracle Universal Installer on a Unix platform to install Oracle Database 10g software, you are prompted to run orainstRoot.sh script. What does this script accomplish?

A) It creates the Oracle user for installation.
B) It creates the Inventory pointer file.
C) It modifies the Unix kernel parameters to match Oracle's requirement.
D) It creates the pointer file.
E) It creates the base directory.

3. Your database is functional with peak load for one hour. You want to preserve the performance statistics collected during this period so that they can be used for comparison while analyzing the performance of the database in the future. What action would you take to achieve this task?

A) Create a baseline on a pair of snapshots that have the statistics of the peak-load period in the database.
B) Set the snapshot retention period in the Automatic Workload Repository (AWR) to zero to avoid the automatic purging of the snapshots.
C) Decrease the snapshot interval in the AWR to collect more number of snapshots during the peak-load period.
D) Set the STATISTICS_LEVEL initialization parameter to ALL.

4. Your database is in NOARCHIVELOG mode and a logswitch happens every 20 minutes. On Thursday morning, media failure resulted in corruption of a data file belonging to the TOOLS tablespace. Backups are taken on every Sunday. What would you do in this situation?

A) restore only the corrupted data file and perform tablespace recovery
B) restore the data files from backup and perform a complete recovery
C) restore the entire database from the most recent backup and start the instance and open the database
D) recover using Oracle Flashback Database technology
E) restore the data files from backup and perform cancel-based recovery

5. Which two are valid locking levels that are used by transactions in an Oracle database? (Choose two.)

A) schema level
B) object level
C) database level
D) block level
E) row level

Solutions: