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2016 June Oracle Official 1Z0-053: Oracle Database 11g: Administration II Exam Questions New Updated Today in Braindump2go.com. 100% 1Z0-053 Exam Pass Guaranteed!

NEW QUESTION 51 – NEW QUESTION 60:

QUESTION 51
Which statements about the MEMORY_TARGET initialization parameter are true? (Choose all that apply.)

A.    MEMORY_TARGET can be increased up to the value of MEMORY_MAX_TARGET,
if MEMORY_MAX_TARGET is set to a value greater than zero
B.    MEMORY_MAX_TARGET defaults to a value of zero if MEMORY_TARGET is not set
C.    MEMORY_TARGET represents the total amount of memory that can be allocated to SGA and PGA
memory structures.
D.    MEMORY_TARGET is static and cannot be modified without shutting down the instance

Answer: ABC

QUESTION 52
You are performing incomplete recovery using RMAN. You execute the following RUN block:
RUN { SET UNTIL SCN 1107600; RESTORE DATABASE; RECOVER DATABASE; }
Which statement is true about the result?

A.    RMAN restores all datafiles from the most recent backup available since the failure and applies the
redo logs necessary to recover the database to SCN 1107600
B.    RMAN restores all datafiles needed to restore the database through SCN 1107599 and applies the
redo logs necessary to recover the database through SCN 1107599.
C.    RMAN restores all datafiles and control files from the most recent backup
D.    The RUN block fails because you did not specify an UNTIL clause in your RECOVER DATABASE
command

Answer: B

QUESTION 53
You are managing an ASM instance. You previously issued the following statements:
ALTER DISKGROUP dg1 DROP DISK disk2;
ALTER DISKGROUP dg1 DROP DISK disk3;
ALTER DISKGROUP dg1 DROP DISK disk5;
You want to cancel the disk drops that are pending for the DG1 disk group. Which statement should you issue?

A.    ALTER DISKGROUP dg1 UNDROP disk2, disk3, disk5;
B.    ALTER DISKGROUP dg1 UNDROP;
C.    ALTER DISKGROUP dg1 UNDROP DISKS;
D.    You cannot cancel the pending disk drops.

Answer: C
Explanation:
 
Use this clause to cancel the drop of disks from the disk group. You can cancel the pending drop of all the disks in one or more disk groups (by specifying diskgroup_name) or of all the disks in all disk groups (by specifying ALL).
This clause is not relevant for disks that have already been completely dropped from the disk group or for disk groups that have been completely dropped. This clause results in a long-running operation. You can see the status of the operation by querying the V$ASM_OPERATION dynamic performance view.

QUESTION 54
A database is running in ARCHIVELOG mode and regular backups are performed.
A user receives the following error message:
Which is the recommended sequence of operations you need to perform for the query successfully?
 

A.    Drop the affected tablespace, re-create the tablespace, restore the datafiles, and the tablespace.
B.    Take the affected datafile offline (if not already offline), restore the damaged image of the datafile,
and then bring it online.
C.    Restart the database in MOUNT mode, restore the damaged datafile, recover the datafile and then
open the database with resetlogs.
D.    Put the database in RESTRICTED mode, restore all the datafiles in the affected datafile and recover
the tablespace, and then put the database in normal operational mode.

Answer: C

QUESTION 55
Observe the structure of the table employees: The table contains 8475 records.
One of the employees wants to know the names of all employees of the company. For this, he fires the following query:
SELECT * FROM EMPLOYEES ORDER BY emp_fname;
Since the operation performed on executing the query cannot fit into memory, it requires disk space to complete the operation.
Which of the following types of segments will Oracle allocate to complete the operation and to provide the required result?
 

A.    Rollback segment
B.    Temporary segment
C.    Data segment
D.    Index segment

Answer: B

QUESTION 56
What is the effect of increasing the value of the ASM_POWER_LIMIT parameter?

A.    The number of DBWR processes increases
B.    The number of ASMB processes increases
C.    The number of DBWR_TO_SLAVES increases
D.    The rebalancing operation in an ASM instance completes more quickly, but can result in higher I/O overhead

Answer: D

QUESTION 57
The DB_BLOCK_CHECKING initialization parameter is set to OFF. Which block checking would be performed?

A.    The Oracle database will perform block checking for the index blocks only
B.    The Oracle database will not perform block checking for any of the data blocks
C.    The Oracle database will perform block checking for the default permanent tablespace only
D.    The Oracle database will perform block checking for the data blocks in all user tablespaces
E.    The Oracle database will perform block checking for the data blocks in the SYSTEM tablespace only

Answer: E

QUESTION 58
You create two resource plans, one for data warehouse loading jobs at night and the other for application jobs at day time. You want the resource plans to activate automatically so that the resource allocation is optimum as desired by the activity.
How would you achieve this?

A.    Implement job classes
B.    Implement Scheduler windows
C.    Implement the mapping rule for the consumer groups
D.    Set the SWITCH_TIME resource plan directive for both the resource plans

Answer: B

QUESTION 59
Which package provides API’s for the SQL Tuning Advisor?

A.    DBMS_MONITOR
B.    DBMS_STATS
C.    DBMS_SQLTUNE
D.    DBMS_ADVISOR

Answer: C
Explanation:
View the Exhibit 1.
In the CUSTOMERS_OBE table, when the value of CUST_STATE_PROVINCE is “CA”, the value of COUNTRY_ID is “US.”
View the Exhibit exhibit2 to examine the commands and query plans.
The optimizer can sense 8 rows instead of 29 rows, which is the actual number of rows in the table.
What can you do to make the optimizer detect the actual selectivity?
desc-customers_obe (exhibit):
 
sql-select-customers_obe (exhibit):
 
Real example refer to here.
Determining Single Column Statistics
A good example of correlated or related columns are the country_id and cust_state_province columns in the CUSTOMERS_OBE table. When the value of cust_state_province is ‘CA’ , the value of country_id is ‘US’. There is a skew in the data in these two columns, which means the majority of rows in the table have the values ‘CA’ and ‘US’. Both the relationship between the columns and the skew in the data make it difficult for the optimizer to calculate the selectivity or cardinality of these columns correctly when they are used together in a query. Extended statistics should help in this situation.

QUESTION 60
Which two statements are true about the duplexing of the backups taken by RMAN? (Choose two.)

A.    It’s only supported for the backups performed on the tape
B.    It is not supported for backup operations that produce image copies
C.    Duplex backups need a parallelism for the device to be equal to number of copies
D.    Duplex backups can be performed to either disk or tape, but cannot be performed on tape and disk
simultaneously

Answer: BD


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