46
、
Which two statements about the background process of the database writer are true? (Choose
two.) AB
A. It is possible to have multiple database writers in an Oracle instance.
B. It writes dirty buffers, if any, to data files whenever a checkpoint occurs.
C. It writes dirty buffers, if any, to data files whenever a transaction commits.
D. It writes dirty buffers, if any, to data files before the log writer (LGWR) writes.
47
、
The TRANS_SUMMARY table contains product-wise transaction details that get updated
with every transaction in the system. Each row has cumulative transaction details of a single product and every
product is identified by a product code, which is the primary key.
As part of the archival process, the company wants to transfer the rows in the TRANS_SUMMARY table to the
TRANS_SUMMARY_DUP table at the end of every quarter of the year. Along with existing products, the
company deals with many new products during every quarter.
Which method is best suited for this quarterly data transfer? A
A. using the MERGE command
B. using the SQL*Loader utility
C. using the correlated UPDATE command
D. using the INSERT command to perform bulk operation
48、You executed the following command to perform a backup of the USERS tablespace: SQL>
ALTER TABLESPACE users BEGIN BACKUP;
ALTER TABLESPACE users BEGIN BACKUP
ERROR at line 1:
ORA-01123: cannot start online backup; media recovery not enabled
What could be the reason for this error? B
A. The MTTR Advisor is disabled.
B. The database is in NOARCHIVELOG mode.
C. The tablespace is already in backup mode.
D. The Flash Recovery Area is not configured.
49、Which two statements are true regarding a PL/SQL package body? (Choose two.) AD
A. It cannot be created without a package specification.
B. It cannot invoke subprograms defined in other packages.
C. It can contain only the subprograms defined in the package specification.
D. It can be changed and recompiled without making the package specification invalid.
50、 Note the following points describing various utilities in Oracle Database 11g:
1.It enables the high-speed transfer of data from one database to another.
2.It provides a complete solution for the backup, restoration, and recovery needs of the entire
database.
3.It enables the loading of data from an external file into an Oracle database.