246、
246.The OPTIMIZER_USE_PLAN_BASELINES parameter is set to TRUE. The optimizer generates a plan for a SQL statement but does not find a matching plan in the SQL plan baseline. Which two operations are performed by the optimizer in this scenario? (Choose two.) A. The optimizer adds the new plan to the plan history. B. The optimizer selects the new plan for the execution of the SQL statement. C. The optimizer adds the new plan to the SQL plan baseline as an accepted plan. D. The optimizer adds the new plan to the SQL plan baseline but not in the ENABLED state. E. The optimizer costs each of the accepted plans in the SQL plan baseline and picks the one with the lowest cost.
247、
247.Which two statements about Oracle Direct Network File System (NFS) are true? (Choose two.) A. It bypasses the OS file system cache. B. A separate NFS interface is required for use across Linux, UNIX, and Windows platforms. C. It uses the operating system kernel NFS layer for user tasks and network communication modules. D. File systems need not be mounted by the kernel NFS system when being served through Direct NFS. E. Oracle Disk Manager can manage NFS on its own, without using the operating system kernel NFS driver.
248、
248.You want the ability to recovery any time within the last seven days and therefore you configured the recovery window retention policy using the command: RMAN> CONFIGURE RETENTIOH POLICY TO RKCOVFRY WINDOW OF 7 DAYS; After configuring the recovery window, you performed the database backup as follows: A. Backup RB1 at log sequence number 12871 on 5th Jan B. Backup RB2 at log sequence number 15622 on 12th Jan C. Backup RB3 at log sequence 16721 on 15th Jan D. On 20th Jan when the log sequence number was 18112 you realize that there Is a need to a point in time at the beginning of the recovery window. You have all an hived redo log files to date.
249、
249.Evaluate the following command and its output: SQL>SELECT * FROM dba_temp_free_space; TABLESPACE_NAME TABLESPACE_SIZE ALLOCATED_SPACE FREE_SPACE LMTEMP 250609664 101048576 149561088 Which two statements correctly interpret the output? (Choose two.) A. FREE_SPACE indicates only the space that is currently unallocated. B. ALLOCATED_SPACE indicates only the space currently allocated and in use. C. FREE_SPACE indicates only the space that is currently allocated and available for reuse. D. ALLOCATED_SPACE indicates both the space currently allocated and used, and the space that is available for reuse. E. FREE_SPACE indicates both the space that is currently allocated and available for reuse, and the space that is currently unallocated.
250、
250.You want to schedule a job to rebuild all indexes on the SALES table after the completion of a bulk load operation. The bulk load operation must also be a scheduled job that executes as soon as the first file that contains data arrives on the system. How would you create these jobs? A. Create both jobs by using events raised by the scheduler B. Create both jobs by using events raised by the application C. Create a job to rebuild indexes by using events arised by the application and then create another job to perform bulk load by using events raised by the scheduler D. Create a job to rebuild indexes by using events arised by the Scheduller and then create another job to perform bulk load by using events raised by the application