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Oracle 1z0-064 Exam Video
Oracle 1z0-064 Exam Practice Question [latest] 1-5
In which three situations can dynamic statistics be used? (Choose three.)
A. when the sampling time is a small fraction of the total time for a query
B. when an execution plan is suboptimal because of complex predicates
C. when extended statistics are not available for SQL statements that use complex predicates
D. when a query is on a partitioned table with a global index
E. when index statistics are missing on a column that is used in SQL statements with highly selective filters
Correct Answer: BCD
Which three statements are true about the interpretation of an execution plan? (Choose three.)
A. The cost of the entire plan is indicated by the line with Id 0 and always includes both I/O and CPU resources.
B. The ROWS column indicates the cardinality of each operation and is always calculated by dividing the total number
of rows in the table by the number of distinct values in the column used in the WHERE clause predicate.
C. A TABLE ACCESS FULL in the Operation column for a query with a WHERE clause occurs only if no index exists for
the filter column.
D. An INDEX UNIQUE SCAN in the Operation column always implies that only one row will be returned.
E. A HASH JOIN in the Operation column always implies that two tables are joined by using an equijoin.
Correct Answer: ABC
You plan to upgrade your production database from Oracle Database 11g to 12c. As part of the upgrade, you want to
introduce new indexes and materialized views. You have already created a test system with Oracle Database 12c,
having the same structure and data as the production database, along with new schema objects to be added to the
You want to identify regressed SQL statements, if any, which may have been caused by schema changes and the
change in the optimizer version.
Which two methods would you use to achieve this? (Choose two.)
A. Create an SQL Tuning Set (STS) for the SQL statements on the production database and submit as input to the SQL
Tuning Advisor on the test database.
B. Create an STS for the SQL statements on the production database and submit as input to the SQL Performance
Analyzer with the OPTIMIZER_FEATURES_ENABLE parameter first set to 126.96.36.199, and then to 188.8.131.52on the test database.
C. Generate an Automatic Workload Repository (AWR) compare periods report with snapshots taken before and after
schema changes on the test database.
D. Capture the production database workload, replay it on the test system by using Database Replay, and analyze by
using the workload replay compare period report.
E. Create an STS for the SQL statements on the production database and submit as input to the SQL Access Advisor
on the test database.
F. Create an STS for the SQL statements on the production database before and after changes and submit as input to
the SQL Performance Analyzer on the test database.
Correct Answer: AD
You are administering a database that supports a DSS workload. Automatic Shared Memory Management is enabled
for the database instance. Users issue queries to perform large soft operations and complain about degraded
performance of the queries. On investigation, you notice that the queries are performing multipass work area executions
and the I/O contention on one of the temporary tablespaces is very high.
Which two can be possible resolutions for this issue? (Choose two.)
A. Increase the size of the large pool.
B. Increase the value of the PGA_AGGREGATE_TARGET parameter.
C. Create a temporary tablespace group and assign it to users.
D. Increase the value of the PGA_AGGREGATE_LIMIT parameter.
E. Create another temporary tablespace and assign it to users.
F. Enable temporary undo.
Correct Answer: AD
Which two statements are true about Active Session History (ASH)? (Choose two.)
A. The Data Sample size available in an ASH report is dynamic and, at any given moment, is directly related to the
amount of work being performed.
B. ASH contains sampled data from all sessions that are connected to a database instance at any given moment.
C. ASH samples data from V$SESSION every second.
D. An ASH report can be used to identify the service that may be the cause of a transient performance problem.
Correct Answer: CD
Oracle 1z0-066 Exam Video
Oracle 1z0-066 Exam Practice Question [latest] 1-5
Which three statements are true about standby redo logs in a Data Guard configuration with no Oracle Streams or
A. They are required on a logical standby for real-time apply
B. They are required only for synchronous redo transport.
C. Only standby databases can write redo to them.
D. It is recommended to have them on the primary database.
E. They are required on a physical standby for real-time apply.
F. The LGWR process writes to them on a standby database.
Correct Answer: ACE
A query on the view DBA_LOGSTDBY_UNSUPPORTED on your primary database returns several rows.
As a result of this, you decide that an upgrade may not use logical standby databases
Which three are true about upgrading Data Guard environments consisting of one physical standby database running on
a separate host from the primary?
A. The upgrade requires downtime until the upgrade of the standby is completed.
B. The broker must be disabled during the upgrade
C. With manual upgrade, catupgrd.sql can be executed on the primary and standby databases simultaneously.
D. The upgrade requires downtime until the upgrade of the primary is completed.
E. The new release of the Oracle Software must be installed on both the primary and standby database hosts
F. Redo Apply on the standby database must be stopped while the primary database is upgraded.
G. Fast-Start Failover can be used to protect the primary database during the upgrade.
Correct Answer: BDE
Your Data Guard environment consists of these components and settings:
A primary database
Two remote physical standby databases
The redo transport mode is set to SYNC.
Real-time query is enabled for both standby databases.
The DB_BLOCK_CHECKING parameter is set to TRUE on both standby databases. You notice an increase in redo
apply lag time on both standby databases.
Which two would you recommend to reduce the redo apply lag on the standby databases?
A. Increase the size of the buffer cache on the physical standby database instances.
B. Increase the number of standby redo log files on the standby databases.
C. Decrease the redo log file size on the primary database.
D. Lower DB_BLOCK_CHECKING to MEDIUM or LOW on the standby databases.
E. Increase the size of standby redo log files on the standby databases.
Correct Answer: AD
Which three statements are true about Global Sequences when connected to a physical standby database with RealTime Query enabled?
A. if the CACHE option is set then the size of the cache must be at least 100
B. Their creation requires that a LOG_ARCHIVE_DEST_n parameter be defined in the standby that points back to their
C. Their usage will always have a performance impact on the primary database.
D. Their usage may have a performance impact on the physical standby database if the CACHE size is too small
E. They must have the NOORDER and CACHE options set.
Correct Answer: BDE
Which two are true about database roles in an Oracle Data Guard Configuration?
A. a configuration consisting only of a primary and one or more physical standby databases can support a rolling
B. A Logical Standby Database can be converted to a Snapshot Standby Database.
C. A Logical Standby Database can cascade redo to a terminal destination
D. A Snapshot Standby Database can be a fast-start failover target
E. A Physical Standby Database can be converted into a Logical Standby Database.
Correct Answer: BE
Oracle 1z0-072 Exam Video
Oracle 1z0-072 Exam Practice Question [latest] 1-5
Which three are true about Oracle Managed Files (OMF)? (Choose three.)
A. If DB_CREATE_FILE_DEST is specified but DB_CREATE_ONLINE_LOG_DEST_n is not, the redo logs and control
files are placed in DB_CREATE_FILE_DEST by default.
B. If DB_RECOVERY_FILE_DEST is specified, at least two different locations must be specified for
C. If only DB_CREATE_FILE_DEST is specified, only the data files and temp files are OMF.
D. If DB_RECOVERY_FILE_DEST is specified but DB_CREATE_ONLINE_LOG_DEST_n is not, the redo logs and
control files are placed in DB_RECOVERY_FILE_DEST by default.
E. If DB_CREATE_ONLINE_LOG_DEST_1 is specified but DB_CREATE_FILE_DEST is not, the data files and temp
files are placed in DB_CREATE_ONLINE_LOG_DEST_1 by default.
F. If only DB_CREATE_ONLINE_LOG_DEST_n is specified, only the redo logs and control files are OMF.
Correct Answer: ABF
Which two statements are true about Oracle Data Pump? (Choose two.)
A. expdp and impdp are its client components.
B. impdp always uses conventional path inserts when importing data.
C. The DBMS_DATAPUMP package can be used only with Data Pump clients
D. It cannot be used to export data as of a previous SCN.
E. impdp can change target data file names, schemas, and tablespaces during import.
Correct Answer: AC
In the ORCL database, UNDOTBS1 is the active undo tablespace with a fixed size of 70 MB and RETENTION
UNDO_RETENTION is set to 15 minutes and the tablespace does not have AUTOEXTEND on.
Which statement is true about a transaction if UNDOTBS1 fills with uncommitted undo within 10 minutes of the
transaction\\’s first update?
A. It succeeds and the generated undo is stored in SYSAUX.
B. It succeeds and the generated undo is stored in TEMP.
C. It fails and returns the error message “Snapshot too old”.
D. It succeeds and the generated undo is stored in SYSTEM.
E. It fails and returns the error message “ORA=30036”: unable to extend segment by 8 in undo tablespace
F. It succeeds and the least recently used undo block UNDOTBS1 is overwritten by the generated undo.
Correct Answer: F
Which three types of files are created by expdp operations? (Choose three.)
A. SQL files
B. dump files
C. reject files
D. log files
E. input data files
F. bad files
G. control files
Correct Answer: ABD
Which two types of files are opened by a database instance in the NOMOUNT state?
A. control files
B. the alert log
C. the initialization parameter file
D. data files
E. online redo logs
Correct Answer: CD
Oracle 1z0-070 Exam Video
Oracle 1z0-070 Exam Practice Question [latest] 1-5
Which two statements are true about the use of DBFS, ACFS, and external file systems and components in an X5
Database Machine environment?
A. ACFS uses storage in a database on the database machine
B. DBFS supports file system snapshots.
C. ACFS supports file system snapshots.
D. Storage Area Network (SAN) ?ased file systems may be accessed directly from the storage servers in a database
E. Oracle Sun ZFS Storage Appliance-based files are not automatically protected by Data Guard.
Correct Answer: BC
DBFS SecureFiles Store Capabilities include support for file system snapshots.
Oracle ACFS includes advanced features such as file system snapshot.
A file contains a script with several EXACLI commands that must be executed on each cell in an X5 full rack.
The script must run on each cell simultaneously.
How would you achieve this?
A. Copy the script to all cells using the DCLI command and manually execute it on each cell using the DCLI command.
B. Copy the script to the cells using the EXACLI command and execute the script on all cells using the EXACLI
C. Execute it on all cells using the EXADCLI command specifying the file name containing the EXACLI script.
D. Copy the script to all cells using the CELLCLI command and execute it on all cells in parallel using the CELLCLI
E. Execute it on all cells using the DBMCLI command specifying the file name containing the EXACLI script.
Correct Answer: C
The exadcli utility runs commands on multiple remote nodes in parallel threads.
You can issue an ExaCLI command to be run on multiple remote nodes. Remote nodes are referenced by their host
name or IP address. Unlike dcli, exadcli can only execute ExaCLI commands. Other commands, for example, shell
commands, cannot be executed using exadcli. References: http://docs.oracle.com/cd/E80920_01/DBMMN/exadcli.htm#
You issued these commands to all Exadata Storage Servers in an X6 Exadata Database Machine using dcli:
alter iormplan objective = low_latency alter iormplan active There are no database or category plans defined.
You are encountering disk I/O performance problems at certain times, which vary by day and week.
DSS and Batch workloads perform well some of the time.
Further investigation shows that at times, the workloads are all OLTP I/Os, at other times all batch I/Os, and sometimes
a bit of each.
You wish to have disk I/O managed so that performance will be optimized for all workloads.
Which statements would you issue to all Exadata Storage Servers to achieve this?
A. alter iormplan objective=high_throughput
B. alter iormplan objective=balanced
C. alter iormplan objective=low_latency
D. alter iormplan objective=auto
E. alter iormplan objective=` \\’
Correct Answer: D
The supported IORM objectives are auto, low_latency, balanced, and high_throughput. The recommended objective
option is auto which allows IORM to continuously monitor the workloads, and select the best mode based on the active
workloads currently on the cells.
Batch and DSS workloads on your Exadata X6 Database Machine are causing performance problems for OLTP
workloads at certain times of the day.
There are five RAC databases performing OLTP I/O. Two of them also perform batch I/O. There is another RAC
database that performs only DSS I/O.
You are asked to resolve this problem so that the OLTP workload will not suffer when competing with the batch or DSS
You decide to use the I/O resource manager.
Which is the best way to solve this problem?
A. Create a category plan with EXADCLI calling EXACLI to give the OLTP category the highest priority on all the cells,
and use the Database Resource Manager to create the OLTP category and map all OLTP- oriented consumer groups in
all databases to it.
B. Use the Database Resource Manager to give the OLTP category the highest priority and use EXADCLI calling
EXACLI to create the OLTP category on all the cells.
C. Create a category plan with EXADCLI calling EXACLI to give the OLTP category the highest priority on all the cells,
and use the Database Resource Manager to give the OLTP consumer group the highest priority on all databases.
D. Create a database plan using EXADCLI calling EXACLI to give OLTP I/O the highest priority from all six databases.
Correct Answer: C
You can manage I/O resources based on categories by creating a category plan.
You can add any number of categories, or modify the predefined categories. You should map consumer groups to the
appropriate category for all databases that
use the same cell storage. Any consumer group without an explicitly specified category defaults to the OTHER
Which two communication methods are used by which components in the Enterprise Manager architecture for a
A. SNMP traps for alerts are sent by the storage server ILOM directly to the Enterprise Manager agent.
B. SNMP traps for alerts are sent by the storage server ILOM to the storage server MS process.
C. SNMP traps for alerts are sent by the storage server MS process to the Enterprise Manager agent.
D. SNMP traps for alerts are sent by the storage server MS process to the storage server ILOM.
E. SNMP traps for alerts are sent by the storage server ILOM to the storage server RS process.
Correct Answer: BC
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Oracle 1z0-064 Pdf Dumps https://drive.google.com/open?id=1W4lA7ykeEnD0pM9zAg5q_s4wRuX406Kg
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Oracle 1z0-070 Pdf Dumps https://drive.google.com/open?id=1mvUyLiAmiwFvghKtCJj-vPjj-IyeZWlg
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