052(二十八）

136、

136.Identify the logical structure that will never have more than one data segment created for it.
A. external table
B. partitioned table
C. partitioned index
D. nonclustered table
E. global temporary table

Answer: D

137、View the Exhibit and examine the command used to create the ZONEDATA table.

The table contains a million rows for zonewise analysis in the DSS system. DML operations are performed very rarely on the table.
You decide to prepare an index on the ZONE column to enhance the performance of the queries on the ZONE column.
Which type of index would you select in this scenario?
A. Bitmap index
B. Reverse key index
C. Normal BTree index
D. Functionbased index

Answer: A

138、

138.The user HR owns the EMP table.
The user HR grants privileges to the user SCOTT by using this command:
SQL> GRANT SELECT,INSERT,UPDATE ON emp TO scott WITH GRANT OPTION;
The user SCOTT executes this command to grant privileges to the user JIM:
SQL> GRANT SELECT,INSERT,UPDATE ON hr.emp TO jim;
Now, the user HR decides to revoke privileges from JIM using this command:
SQL> REVOKE SELECT,INSERT,UPDATE ON emp FROM jim;
Which statement is true after HR issues the REVOKE command?
A. The command fails because SCOTT still has privileges.
B. The command succeeds and privileges are revoked from JIM.
C. The command fails because HR cannot revoke the privileges from JIM.
D. The command succeeds and only HR has the privilege to perform the SELECT, INSERT, and UPDATE operations on the EMP table. 

Answer: C

139、

139.Which statement describes the effect on an index, when the indexed column for the rows is updated in the base table?
A. An update in a leaf row takes place.
B. The index becomes invalid after the update.
C. The leaf block containing the row to be updated is marked as invalid.
D. A row in the leaf block of the index for the key value is logically deleted and a new leaf row is inserted. 

Answer: D

140、

140.You are managing an Oracle Database 11g database running in ARCHIVELOG mode.
The Flash Recovery Area is specified as the destination for the archived redo log files.
You notice this warning in the alert log file:
ORA19815: WARNING: db_recovery_file_dest_size of 3221225472 bytes is 100.00% used, and has 0 remaining bytes available.
What would you do to reclaim the used space in the Flash Recovery Area? (Choose two.)
A. Back up the Flash Recovery Area.
B. Decrease the retention time for the database backup and flashback log files.
C. Manually delete all the archived log files from the Flash Recovery Area by using operating system (OS) commands.
D. Manually delete all the expired backup sets from the Flash Recovery Area by using operating system (OS) commands. 

Answer: AB