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Oracle database 10g:Administration I Sample Questions:

1. Users of HR schema complain about slower-than-normal performance. On investigation the DBA found that maintenance was recently performed on some of the tables. The DBA traced the query that takes longer than normal to execute.
View the Exhibit exhibit_before.
After the DBA resolves the problem, the query performs normally.
View the Exhibit exhibit_after.
What action would the DBA have taken to resolve the performance problem?

A) moved the EMPLOYEES table to another location in the same tablespace
B) reorganized the associated indexes for the EMPLOYEES table that were in an unusable state
C) moved the indexes associated with the EMPLOYEES table to the same tablespace where the EMPLOYEES table exists
D) moved the EMPLOYEES table in to a locally managed tablespace
E) analyzed the EMPLOYEES table to collect the current statistics

2. You have a large amount of historical data in an operating system file. Some analysts in your organization need to query this data. The file is too large to load into your current database. Which is the most effective method to accomplish the task?

A) Upgrade the hardware/memory to accommodate the data.
B) Give analysts DBA privilege, so that they can query DBA_EXTERNAL_TABLES.
C) Use an external table so you can have the metadata available in your database, but leave the data in the operating system files.
D) Load the data into your database by using the PARALLEL clause.

3. A user receives the following error while executing a query:
ORA-01555: snapshot too old
Which two options can be the solutions to avoid such errors in future? (Choose two.)

A) enable the retention guarantee for the undo tablespace
B) increase the size of the undo tablespace
C) increase the size of the Database Buffer Cache
D) increase the size of the default temporary tablespace
E) increase the size of redo log files

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

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

5. Your test database is running in NOARCHIVELOG mode. What are the implications of this?

A) You can perform open database backups.
B) You can perform the backup of only the SYSTEM tablespace when the database is open.
C) You can perform closed database backups.
D) You cannot perform schema-level logical backups.

Solutions: