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QUESTION NO:40

To implement Automatic Management (AMM), you set the following parameters:

When you try to start the database instance with these parameter settings, you receive the following error

message:

SQL > startup

ORA-00824: cannot set SGA_TARGET or MEMORY_TARGET due to existing internal settings, see alert

log for more information.

Identify the reason the instance failed to start.

A. The PGA_AGGREGATE_TARGET parameter is set to zero.

B. The STATISTICS_LEVEL parameter is set to BASIC.

C. Both the SGA_TARGET and MEMORY_TARGET parameters are set.

D. The SGA_MAX_SIZE and SGA_TARGET parameter values are not equal.

Correct Answer: B

Explanation

Explanation/Reference:

Example:

SQL> startup force

ORA-00824: cannot set SGA_TARGET or MEMORY_TARGET due to existing internal settings ORA00848:

STATISTICS_LEVEL cannot be set to BASIC with SGA_TARGET or MEMORY_TARGET

QUESTION NO:57

Examine the following query output:

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You issue the following command to import tables into the hr schema:

$ > impdp hr/hr directory = dumpdir dumpfile = hr_new.dmp schemas=hr

TRANSFORM=DISABLE_ARCHIVE_LOGGING: Y

Which statement is true?

A. All database operations performed by the impdp command are logged.

B. Only CREATE INDEX and CREATE TABLE statements generated by the import are logged.

C. Only CREATE TABLE and ALTER TABLE statements generated by the import are logged.

D. None of the operations against the master table used by Oracle Data Pump to coordinate its activities

are logged.

Correct Answer: C

Explanation

Explanation/Reference:

Oracle Data Pump disable redo logging when loading data into tables and when creating indexes. The new

TRANSFORM option introduced in data pumps import provides the flexibility to turn off the redo generation

for the objects during the course of import. The Master Table is used to track the detailed progress

information of a Data Pump job.

The Master Table is created in the schema of the current user running the Pump Dump export or import,

and it keeps tracks of lots of detailed information.

QUESTION NO:21

Which two statements are true about extents?

A. Blocks belonging to an extent can be spread across multiple data files.

B. Data blocks in an extent are logically contiguous but can be non-contiguous on disk.

C. The blocks of a newly allocated extent, although free, may have been used before.

D. Data blocks in an extent are automatically reclaimed for use by other objects in a tablespaee when all

the rows in a table are deleted.

Correct Answer: BC

Explanation

Explanation/Reference:

QUESTION NO:20

Examine the memory-related parameters set in the SPFILE of an Oracle database:

memory_max_target–6G

memory_target=5G

pga_aggregate_target=500M

sga_max_size=0

sga_target=0

Which statement is true?

A. Only SGA components are sized automatically-

B. Memory is dynamically re-allocated between the SGA and PGA as needed.

C. The size of the PGA cannot grow automatically beyond 500 MB.

D. The value of the MEMORY_TARGET parameter cannot be changed dynamically.

Correct Answer: C

Explanation

Explanation/Reference:

QUESTION NO:73

Which three statements are true concerning the multitenant architecture?

A. Each pluggable database (PDB) has its own set of background processes.

B. A PDB can have a private temp tablespace.

C. PDBs can share the sysaux tablespace.

D. Log switches occur only at the multitenant container database (CDB) level.

E. Different PDBs can have different default block sizes.

F. PDBs share a common system tablespace.

G. Instance recovery is always performed at the CDB level.

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Correct Answer: BDG

Explanation

Explanation/Reference:

B:

* A PDB would have its SYSTEM, SYSAUX, TEMP tablespaces.It can also contains other user created

tablespaces in it.

* There is one default temporary tablespace for the entire CDB. However, you can create additional

temporary tablespaces in individual PDBs.

D:

* There is a single redo log and a single control file for an entire CDB

* A log switch is the point at which the database stops writing to one redo log file and begins writing to

another. Normally, a log switch occurs when the current redo log file is completely filled and writing must

continue to the next redo log file.

G: instance recovery

The automatic application of redo log records to uncommitted data blocks when an database instance is

restarted after a failure.

Incorrect:

Not A:

* There is one set of background processes shared by the root and all PDBs.

* High consolidation density. The many pluggable databases in a single container database share its

memory and background processes, letting you operate many more pluggable databases on a particular

platform than you can single databases that use the old architecture.

Not C: There is a separate SYSAUX tablespace for the root and for each PDB.

Not F: There is a separate SYSTEM tablespace for the root and for each PDB.

QUESTION NO:88

A senior DBA asked you to execute the following command to improve performance:

SQL> ALTER TABLE subscribe log STORAGE (BUFFER_POOL recycle);

You checked the data in the SUBSCRIBE_LOG table and found that it is a large table containing one

million rows.

What could be a reason for this recommendation?

A. The keep pool is not configured.

B. Automatic Workarea Management is not configured.

C. Automatic Shared Memory Management is not enabled.

D. The data blocks in the SUBSCRIBE_LOG table are rarely accessed.

E. All the queries on the SUBSCRIBE_LOG table are rewritten to a materialized view.

Correct Answer: D

Explanation

Explanation/Reference:

The most of the rows in SUBSCRIBE_LOG table are accessed once a week.

QUESTION NO:7

Which two statements correctly describe the relationship between data files and logical database

structures?

A. A segment cannot span data files.

B. A data file can belong to only one tablespace.

C. An extent cannot span data files.

D. The size of an Oracle data block in a data file should be the same as the size of an OS block.

Correct Answer: BC

Explanation

Explanation/Reference:

Reference: https://mohibalvi.wordpress.com/tag/alter-tablespace/

QUESTION NO:92

Which two statements are true about Oracle Managed Files (OMF)?

A. OMF cannot be used in a database that already has data files created with user-specified directions.

B. The file system directions that are specified by OMF parameters are created automatically.

C. OMF can be used with ASM disk groups, as well as with raw devices, for better file management.

D. OMF automatically creates unique file names for table spaces and control files.

E. OMF may affect the location of the redo log files and archived log files.

Correct Answer: DE

Explanation

Explanation/Reference:

D: The database internally uses standard file system interfaces to create and delete files as needed for the

following database structures:

Tablespaces

Redo log files

Control files

Archived logs

Block change tracking files

Flashback logs

RMAN backups

Note:

* Using Oracle-managed files simplifies the administration of an Oracle Database. Oracle- managed files

eliminate the need for you, the DBA, to directly manage the operating system files that make up an Oracle

Database. With Oracle-managed files, you specify file system directories in which the database

automatically creates, names, and manages files at the database object level. For example, you need only

specify that you want to create a tablespace; you do not need to specify the name and path of the

tablespace’s datafile with the DATAFILE clause.

http://www.oracle-base.com/articles/9i/oracle-managed-files.php http://docs.oracle.com/cd/B10500_01/

server.920/a96521/omf.htm

Reference: What Are Oracle-Managed Files?

QUESTION NO:67

You have installed two 64G flash devices to support the Database Smart Flash Cache feature on your

database server that is running on Oracle Linux.

You have set the DB_SMART_FLASH_FILE parameter:

DB_FLASH_CACHE_FILE= `/dev/flash_device_1 `,’ /dev/flash_device_2′

How should the DB_FLASH_CACHE_SIZE be configured to use both devices?

A. Set DB_FLASH_CACHE_ZISE = 64G.

B. Set DB_FLASH_CACHE_ZISE = 64G, 64G

C. Set DB_FLASH_CACHE_ZISE = 128G.

D. DB_FLASH_CACHE_SIZE is automatically configured by the instance at startup.

Correct Answer: B

Explanation

Explanation/Reference:

* Smart Flash Cache concept is not new in Oracle 12C – DB Smart Flash Cache in Oracle 11g. In this

release Oracle has made changes related to both initialization parameters used by DB Smart Flash cache.

Now you can define many files|devices and its sizes for “Database Smart Flash Cache” area. In previous

releases only one file|device could be defined.

DB_FLASH_CACHE_FILE = /dev/sda, /dev/sdb, /dev/sdc

DB_FLASH_CACHE_SIZE = 32G, 32G, 64G

So above settings defines 3 devices which will be in use by “DB Smart Flash Cache”

/dev/sda size 32G

/dev/sdb size 32G

/dev/sdc size 64G

New view V$FLASHFILESTAT it’s used to determine the cumulative latency and read counts of each file|

device and compute the average latency

QUESTION NO:105

Examine the details of the Top 5 Timed Events in the following Automatic Workloads Repository (AWR)

report:

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What are three possible causes for the latch-related wait events?

A. The size of the shared pool is too small.

B. Cursors are not being shared.

C. A large number COMMITS are being performed.

D. There are frequent logons and logoffs.

E. The buffers are being read into the buffer cache, but some other session is changing the buffers.

Correct Answer: ABE

Explanation

Explanation/Reference:

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