053(五十七）

281、

281.You are working on a 24X7 database. You want to design a backup strategy for your database that uses user managed backups.
You want to be able to perform all backups while the database remains online.
Which statement about performing user-managed backups in a 24x7 environment is true?
A. You must have change tracking enabled in your database
B. Your database must be running in NOARCHIVELOG mode
C. To back up a tablespace, it must be in backup mode
D. To back up a tablespace, it must first be taken offline

282、

282.You are managing an Oracle 11g database with ASM storage, for which the COMPATIBLE initialization parameter is set to 11.1.0. In the ASM instance,
the COMPATIBLE.RDBMS attribute for the disk group is set to 10.2 and the COMPATIBLE.ASM attribute is set to 11.1.
Which two statements are true in this scenario for the features enabled for ASM? (Choose two.)
A. The ASM-preferred mirror read feature is enabled.
B. The ASM supports variable sizes for extents of 1, 8, and 64 allocation units.
C. The ASM disk is dropped immediately from a disk group when it becomes unavailable.
D. The RDBMS always reads the primary copy of a mirrored extent of the ASM disk group.

283、

283.You set the following parameters in the parameter file and restarted the database:
MEMORY_MAX_TARGET=0
MEMORY_TARGET=500M PGA_AGGREGATE_TARGET=90M SGA_TARGET=270M
Which two statements are true regarding these parameters after the database instance is restarted? (Choose two.)
A. The MEMORY_MAX_TARGET parameter is automatically set to 500 MB.
B. The value of the MEMORY_MAX_TARGET parameter remains zero till it is changed manually.
C. The PGA_AGGREGATE_TARGET and SGA_TARGET parameters are automatically set to zero.
D. The lower bounds of PGA_AGGREGATE_TARGET and SGA_TARGET parameters are set to 90 MB and 270 MB, respectively.

284、

284.Evaluate the following SQL statement used to create the PRODUCTS table:
CREATE TABLE products
(
product_id NUMBER(3) PRIMARY KEY,
product_desc VARCHAR2(25),
qty NUMBER(8,2),
rate NUMBER(10,2),
total_value AS ( qty * rate)
) PARTITION BY RANGE (total_value)
(
PARTITION p1 VALUES LESS THAN (100000),
PARTITION p2 VALUES LESS THAN (150000),
PARTITION p3 VALUES LESS THAN (MAXVALUE)) COMPRESS FOR ALL OPERATIONS;
Which statement is true regarding this command?
A. It executes successfully but partition pruning cannot happen for this partition key.
B. It produces an error because the TOTAL_VALUE column cannot be used as a partition key.
C. It produces an error because compression cannot be used for the TOTAL_VALUE partition key.
D. It executes successfully but the values in the TOTAL_VALUE column would not be physically stored in the partitions.

285、View the Exhibit to examine the error while executing the REPAIR FAILURE command in an RMAN session.

What is the reason for this error?

A. Another repair session is running concurrently.
B. The failure ID has not been mentioned in the command for data file 5.
C. There are new failures recorded in the Automatic Diagnostic Repository (ADR).
D. The ADVISE FAILURE command has not been issued before the REPAIR FAILURE command.