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1z0-417.exam

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ORACLE

1z0-417

Database Performance and Tuning Essentials 2015


Exam A

QUESTION 1DBAs use scripts and a third-party tool that access Automatic Workload Repository (AWR) snapshot reports, but don't use Oracle Enterprise Manager. The ITManager seeks to confirm what the DBAs told him – Its OK since they licensed Oracle Database Enterprise Edition and not the Standard Edition. Which is thecorrect response for this scenario?

A. With an Oracle Enterprise Edition Database license, a customer can use any Oracle option they want, at any of their worldwide locations, without additionallicensing.

B. No matter how AWR snapshot reports are accessed, Oracle Enterprise Edition Database customers need to be licensed for the Oracle Diagnostic Pack forOracle Databases.

C. With an Oracle Database Enterprise Edition license, an Oracle customer can use any Oracle option they want, at that location, without additional licensing.D. No matter how AWR snapshot reports are accessed, Oracle Enterprise Edition Database customers need to be licensed for the Advanced Analytic Pack for

Oracle Databases.E. With an Oracle Database Enterprise Edition license, an Oracle customer can access AWR snapshots by using SQL. If you use anything else, then you need an

additional license.

Correct Answer: CSection: (none)Explanation

Explanation/Reference:

QUESTION 2At the IT Manager request, you are reviewing the databases that the DBA has implemented. You find STATISTICS_LEVEL configured as BASIC. What finding doyou report back to the IT Manager?

A. The configuration of their databases is set up to also provide timed Operating System statistics and plan execution statistics.B. The configuration of their databases is incorrect and should be set to NOT_TYPICAL.

C. The configuration of their databases has disabled collection of important statistics required for Oracle Database functionality.D. The configuration of their databases needs to be set to ALL to enable collection of Operating System, Middleware, and storage statistics.




QUESTION 3Which background process performs Automatic Workload Repository (AWR) tasks such as writing when a metric violates its threshold value, taking snapshots,and capturing statistics for recently modified SQL objects?

A. LGWRB. DBWRC. CKPTD. MMONE. MMNL

Correct Answer: DSection: (none)Explanation

Explanation/Reference:Explanation: The manageability monitor process (MMON) performs many tasks related to the Automatic Workload Repository (AWR). For example, MMONwrites when a metric violates its threshold value, taking snapshots, and capturing statistics value for recently modified SQL objects. Reference: https://docs.oracle.com/cd/E11882_01/server.112/e40540/process.htm#CNCPT008

QUESTION 4When preparing a new database installation, you want to ensure automatic collection of timed statistics. Which three configuration parameters are applicable?

A. STATISTICS_LEVEL parameter set to TYPICALB. STATISTICS_LEVEL parameter set to All

C. TIMED_STATISTICS parameter set to true

D. ALL_TIMED_STATISTICS parameter set to TRUE

E. AUTO_STATS parameter set to TRUE

F. STATISTICS_LEVEL parameter set to BASIC.


Correct Answer: ABCSection: (none)Explanation


QUESTION 5Which is a capability that Active Session History (ASH) reports enable you to perform?

A. Compare database performance between two periods of time, and resolve performance degradation that may happen from one time period to another.B. Analyze transient performance problems with the database that are short-lived and do not appear in the ADDM analysis.C. Optimize the performance of data access paths by creating the proper set of materialized views, materialized view logs, and indexes for a given workload.D. Analyze transient performance problems that have happened in the database since it has been started.

Correct Answer: BSection: (none)Explanation

Explanation/Reference:Explanation: The Active Session History (ASH) reports enable you to analyze transient performance problems with the database that are short-lived and do notappear in the ADDM analysis. Reference: http://docs.oracle.com/cd/B19306_01/server.102/b28051/tdppt_method.htm#TDPPT017

QUESTION 6Which three are controllable by a resource plan, when you are using the Oracle Database 12c Multitenant option?

A. CPUB. concurrent sessionsC. SGAD. network I/OE. ability to use parallel server processesF. use of SGA memory and ability to allocate PGA

Correct Answer: ABESection: (none)Explanation



QUESTION 7What are three reasons an implementation of an Oracle Database Performance and Tuning solution is superior to that of scripts or third-party tools?

A. It is a part of the database, which means no added installations, configurations, extra user accounts, privilege granting, etc.B. It eliminates the need to reverify compatibility, upgrade third-party tools, or rewrite scripts after a patch or database upgrade.C. It has the largest library of custom scripts and procedures and includes an assembly builder to maintain them and add more.D. Results come from the Oracle Database Optimizer and not rules or heuristics trying to predict what the optimizer may do.E. It is the most inexpensive tool in the market.

Correct Answer: BDESection: (none)Explanation


QUESTION 8To use Automatic Database Diagnostic Management capability on a database using a SQL script, command line, database views, or from a GUI, which optionneeds to be licensed?

A. Oracle Diagnostics Pack for Oracle DatabasesB. Oracle Tuning Pack for Oracle DatabasesC. Oracle Diagnostics and Tuning Pack for Oracle DatabasesD. Oracle ADDM PackE. Nothing else needs to be licensed.




QUESTION 9When planning Oracle Database Architecture, which option can be used to reduce the number of Oracle processes waiting in the Operating System run queue andto ensure that database CPU load is healthy?

A. ExadataB. Oracle Job SchedulerC. DATABASE_MAXCPUS=YES

D. Oracle Database Resource ManagerE. DB_RAC_MAXCPU=YES

F. Oracle Grid Control


Explanation/Reference:Reference: http://www.oracle.com/technetwork/database/performance/resource-manager-twp-133705.pdf

QUESTION 10You need to limit the resources available to each Pluggable Database (PDB) within a Container Database (CDB). Utilizing Resource Manager, which are threeoptions that can be managed by a resource plan?

A. memoryB. CPUC. Parallel Execution ServersD. shares of system resourcesE. number of usersF. number of tables or indexesG. number of indexes

Correct Answer: BCDSection: (none)Explanation



QUESTION 11Which are two strategies to maintain performance and improve a table segment's compression ratio when you are using Advanced Row Compression on a tablesegment?

A. Use smaller database block size.B. Use larger database block size.C. Use direct-path inserts where possible.D. Increase PCTFREE on the table segment.

E. Increase the size of the tablespace.

Correct Answer: AESection: (none)Explanation


QUESTION 12Upon migration to Oracle Database 12c, a customer asked that monitoring at an individual database level be disabled in favor of database performance monitoringconsolidated and centralized across their enterprise.

Which are two actions you would take to meet the customer's requirements?

A. Disable Oracle Enterprise Manager Database Express by setting the HTTP Port to 0.B. For the always active Oracle Enterprise Manager Database Express process, create a script that will disable that process upon database boot.C. Using the appropriate architecture implement Oracle Enterprise Manager.D. Delete the “express” directory in Oracle Home to disable Oracle Enterprise Manager Database Express.E. Changes permissions of the “express” directory to real only by root.F. Enable SNMP and configure MIBS on each database and forward database monitoring SNMP traps.

Correct Answer: BESection: (none)Explanation



QUESTION 13Which is used to preserve SQL execution plans of existing statements when moving from one version of the database to another?

A. SQL HintsB. Stored OutlinesC. Stored ProfilesD. SQL Plan ManagementE. SQL Profiles


Explanation/Reference:Explanation: SQL statement, or migrate an existing stored outline by loading the "outlined" plan as a fixed plan. Reference: https://docs.oracle.com/cd/E18283_01/server.112/e16638/optplanmgmt.htm

QUESTION 14When planning an Oracle Database architecture, which are three caching functionalities that would improve application response time and speed up queryprocessing?

A. Result CacheB. Mega CacheC. Oracle In-Memory Database CacheD. Database Smart Flash CacheE. Oracle In-Memory DBSTATS Cache

Correct Answer: ACDSection: (none)Explanation


QUESTION 15Which option would you use to capture workloads from one or more systems concurrently and then play them back?


A. Automatic Workload RepositoryB. Enterprise Manager Cloud ControlC. Consolidated Database ReplayD. Consolidation PlannerE. Workload Consolidator and Playback



QUESTION 16Which option would you use to validate performance when migrating an Oracle Database from HPUX Itanium to Oracle Linux 6 architecture?

A. Oracle Diagnostic Pack for DatabaseB. Real Application TestingC. Oracle Migration Pack for DatabasesD. Oracle Migration Performance AdvisorE. SQL Performance Testing Suite



QUESTION 17


Which two situations help to identify that a customer as already using Oracle Diagnostics Pack for Oracle Database functions?

A. The customer has Enterprise Manager installed on a separate server and regularly accesses the Database home page of some of its Enterprise Editiondatabases from its console.

B. A customer says that he or she doesn't use Enterprise Manager, but you learn that the customer routinely executes awrrpt.sql from the SQLPlus prompt.

C. A customer has the CONTROL_MANAGEMENT_PACK_ACCESS initialization parameter set to DIAGNOSTIC+TUNING.

D. A customer says that he or she doesn't use Enterprise Manager, but you learn that the customer has SQL scripts that access the DBA_HIST_ACTIVE_SESS_HISTORY database view.

E. A customer says that he or she doesn't use the Enterprise Manager, but you learn that the customer uses customized SQL scripts that access V$SESSION andV$SQL views.

Correct Answer: CDSection: (none)Explanation


QUESTION 18A customer asked you about Database Time (DB Time). Which are two correct statements you would include in your description of it?

A. It is the total time spent in database calls by all sessions in the database.B. It is the total time spent in database calls by foreground sessions in the database.C. It is the total time spent in database calls by background sessions in the database.D. It includes non-idle wait time.E. It is the overall response time.F. It includes login, idle, background, and Zombie session wait time.

Correct Answer: BCSection: (none)Explanation

Explanation/Reference:Reference: http://www.oracle.com/technetwork/oem/db-mgmt/s317294-db-perf-tuning-with-db-time-181631.pdf http://blog.orapub.com/20140805/What-Is-Oracle-DB-Time-DB-CPU-Wall-Time-and-Non-Idle-Wait-Time.html

QUESTION 19IT Operations had observed short CPU spikes and I/O storms prior to a retail website outage. Which functionality of Diagnostics Pack for Oracle Databases wouldyou implement to diagnose and resolve the customers issue?


A. Active Workload History to collect SQL at the time of its execution.B. SQL Performance Analyzer to capture the information in the SGA, the sessions active, and analyze the SQL executing.C. Oracle Workload Advisor that automatically turns on and captures the offending SQL Statements when thresholds are reached.D. Active Session History to capture sessions and dump the SQL executing, performance attributes and relevant information into a buffer for analysis.E. Active SQL History Analyzer to do perform a comparison of SQL statements before and after.F. Oracle Exadata, as it already includes Diagnostic Pack for Oracle Database.



QUESTION 20Which are two characteristics of “invisible” index functionality that would help tune a database having thousands of legacy indexes?

A. An invisible index is ignored by the optimizer.B. After an index becomes invisible, it is no longer maintained during inserts and updates.C. I/O bottlenecks are easy to spot when invisible indexes are used.D. An index only needs to be rebuilt for it to be visible again.E. The session or system parameter needs to be changed to OPTIMIZER_USE_INVISIBLE_INDEXES to TRUE for an invisible index to become visible to the

Optimizer.

Correct Answer: AESection: (none)Explanation



QUESTION 21What are two reasons for which the Diagnostics and Tuning packs are essential to ongoing maintenance of an Oracle Database?

A. With Diagnostics and Tuning Packs installed, an Oracle database recovers easily from a crash or corruption.B. Oracle Databases are constantly changing; more users, data added and deleted, varying SQL at application level.C. Diagnostics and Tuning Packs are needed to keep Oracle Database table and index statistics current.D. Inefficient “Bad” application SQL can be detected by Diagnostics Pack and then optimized utilizing Tuning Pack SQL Profiles, even if it can't be changed at the

application end.E. Diagnostics and Tuning packs are a prerequisite for a customer to license Oracle Database Enterprise Edition.

Correct Answer: BDSection: (none)Explanation


QUESTION 22When implementing an Oracle Database Performance and Tuning solution, which are three product technologies recommended for use as your baseconfiguration?

A. SQL Tuning Pack for Oracle DatabaseB. Oracle Tuning Pack for Oracle DatabaseC. Oracle Performance Pack for Oracle DatabaseD. Oracle Diagnostics Pack for Oracle DatabaseE. Oracle Real Application TestingF. Oracle SQL DeveloperG. STATSPACK


Explanation/Reference:Reference: http://www.oracle.com/partners/en/most-popular-resources/db-performance-tuning-study-guide-2138991.pdf (See page #03, Application producttechnology subject areas include).


QUESTION 23Which three issues can be addressed with an Oracle Database Performance and Tuning solution?

A. erratic or inconsistent database performanceB. declining database responsivenessC. unlimited I/OD. fragmented database tablesE. database registry errorsF. database replication

Correct Answer: CDFSection: (none)Explanation


QUESTION 24Which statement is true about implementation of an Oracle Database Performance and Tuning solution?

A. It is available for Oracle Database Standard and Enterprise Editions.B. It is applicable for Oracle Database 12c and later versions.C. It builds on capabilities built into Oracle databases.D. It is recommended for Production environments, but not for Development or QA.E. It is delivered with Oracle Engineered Systems.

Correct Answer: ESection: (none)Explanation


QUESTION 25When performing performance analysis of Oracle Real Application Cluster (RAC) databases, what are three Automatic Database Diagnostics Monitoring (ADDM)analysis modes that are available?

A. Database


B. InstanceC. PartialD. SampleE. Average



QUESTION 26Which is a prerequisite for using an Oracle Database Performance and Tuning solution?

A. Linux Operating systemB. 8 GB of memoryC. Oracle Database Enterprise EditionD. Oracle Enterprise ManagerE. deep knowledge of Oracle Storage subsystems



QUESTION 27Upon implementation completion, which three should be reviewed with a customer to confirm the values or benefits of a Oracle Database Performance and Tuningsolution?

A. real-time and historical monitoring capabilitiesB. non-intrusive metric collectionsC. statspack integration and supportD. integration with Enterprise ManagerE. included scripts for querying X$ and V$ viewsF. SQL script code management capabilities


Correct Answer: ABDSection: (none)Explanation


QUESTION 28Which one would SQL Access Advisor use as input to provide a recommendation on a partition or index?

A. SQL Tuning AdvisorB. Automatic Workload RepositoryC. Automatic Diagnostic MonitorD. SQL Tuning SetE. SQL Errors

Correct Answer: ASection: (none)Explanation


QUESTION 29When providing partition and index recommendations, which one would SQL Access Advisor source input from?

A. SQL Tuning AdvisorB. Automatic Workload RepositoryC. Automatic Database Diagnostic MonitorD. SQL Tuning Set




QUESTION 30Which is a true statement about the difference in the functionality of Active Session History (ASH) and SQL Trace/TKPROF?

A. ASH provides time based data, SQL Trace/TKPROF does notB. ASH provides detailed session level data, SQL Trace/TKPROF does notC. ASH is always on, SQL Trace/TKPROF is notD. ASH identifies Bind variables that are available, SQL Trace/TKPROF does notE. ASH counts and has occurrence data, SQL Trace/TKPROF does not



QUESTION 31Instead of a database automatically publishing statistics when statistics collection ends, you want to test queries a satisfactory result before they are made availableto the entire database. Which would you configure for that to occur?

A. Set OPTIMIZER_USE_PENDING_STATISTICS to TRUE.

B. Set AUTO_UPDATE_STATISTICS to FALSE.

C. Use a HOLD HINT in the SQL.

D. Set AUTOMATIC_WORKLOAD_REPOSITORY_COLLECTION to PAUSE.




QUESTION 32Which two are functionalities of Oracle Real Application Testing?

A. Database ReplayB. SQL Query Sets (SQS)C. SQL Tuning AnalyzerD. SQL Performance Analyzer (SPA)E. Real Application Cluster Replay

Correct Answer: ADSection: (none)Explanation

Explanation/Reference:Reference: http://www.oracle.com/us/products/database/options/real-application-testing/overview/index.html

QUESTION 33When reviewing a customer's database configuration, you find that OPTIMIZER_USE_SQL_PLAN_BASELINES is set as TRUE. What does the Optimizer do?

A. compares plans that it develops with accepted plans in baselinesB. develops plans and adds them to baselines as verifiedC. doesn't develop an execution plan, but uses an accepted plan from baselinesD. doesn't develop an execution plan, but uses enabled plans in the baseline



QUESTION 34Which issue can be avoided by configuring the PCTFREE parameter?

A. row chaining and setting it has been superseded by Automatic Segment Space ManagementB. table fragmentation, and has been superseded by Automatic Storage ManagementC. column fragmentation


D. sort operations on diskE. keeping a reserve area for backup



QUESTION 35Which action can be performed by using Oracle Enterprise Manager Database Express Performance Hub?

A. View health status and performance of an Oracle Database instance via Database Control.B. Launch and view STATSPACK reports.C. View real-time and historical Oracle Database performance information.D. View only real-time Oracle Database performance information.E. View only historical Oracle Database performance information.F. Consolidate ADDM, AWR, and ASH repositories within an enterprise and enable centralized performance reporting.



QUESTION 36Which is a feature of an Oracle Database Performance and Tuning implemented solution?

A. a Documented Set of X$ and V$ Query Scripts


B. a Maximum Availability ArchitectureC. a Documented Performance MethodologyD. capability to Cloud BurstE. a Documented Performance Response Method



QUESTION 37Which are three practices that developers can use to enhance performance, scalability, and availability of Oracle Database-driven applications?

A. Implement primary and foreign keys, enforce database integrity, joins, message queuing, maintenance of sequences outside of the database.B. Use Big Data to hold everything into one big table.C. Maintain and analyze performance statistics using AWR and ADDM.D. Eliminate hot spots in applications, monitor, measure, and optimize SQL statement execution.E. Perform testing with Real Application Testing.

Correct Answer: ACESection: (none)Explanation


QUESTION 38The IT team said that a system appeared OK based on their third-party network and systems management tool; yet customers continue to complain of databaseperformance-related issues. Which two would you implement to find and fix the problem?

A. Oracle Real User Experience InsightB. Oracle Application Testing SuiteC. Oracle ExadataD. Oracle Real Application ClustersE. Oracle Diagnostic and Tuning Pack for Oracle Database


Correct Answer: DESection: (none)Explanation


QUESTION 39Starting with Oracle Database 11gR2, which are two additional partitioning capabilities that aid Oracle Database Performance and Tuning?

A. Hash PartitioningB. Reference PartitioningC. Composite PartitioningD. Interval PartitioningE. Disk Partitioning



QUESTION 40Identify four problems automatically diagnosed by Automatic Database Diagnostics Monitor (ADDM).

A. log file sizingB. log buffer sizingC. log file problematic namingD. Mean Time to recover (MTTR) settingE. undersized SGA or PGAF. oversized SGA or PGAG. Less Time to recover (LTTR) setting

Correct Answer: ADEFSection: (none)Explanation



QUESTION 41You are reviewing an Automatic Database Diagnostic Monitor report. What is DB Time% a percentage of?

A. total CPU timeB. elapsed response timeC. total time in database calls by all processesD. total time in V$ viewsE. time that users wait for the database to respond



QUESTION 42A customer seeks capability to measure and test database performance before and after application changes. Which would you implement to meet thatrequirement?

A. Oracle Performance AnalyzerB. Oracle Application Performance AnalyzerC. Oracle Real Application TestingD. Oracle SQL DeveloperE. Oracle Spatial and Graph



QUESTION 43Which three are SQL Performance Analyzer capabilities that enable forecasting impact of system changes on a SQL workload?


A. measuring performance before and after the change

B. generating a list of SQL Hints that the Optimizer will use to improve overall performanceC. identifying the SQL statements that regressed or improvedD. providing tuning recommendations for each SQL statement that is regressedE. measuring performance and comparing to industry benchmarks (TPC-C, TPC-D)F. measuring a change in user session logins

Correct Answer: ACDSection: (none)Explanation


QUESTION 44Which is the default statistics gathering period for Automatic Database Diagnostics Monitoring (ADDM)?

A. every 30 secondsB. every 60 minutesC. every 30 minutesD. every 24 hoursE. every 40 hours




QUESTION 45To isolate performance problem in an Oracle real Application Cluster, for which two abilities would you implement Oracle Diagnostics Pack for Oracle Databases?

A. Cluster-wide performance analysis and reports with ADDM on issues that affect an entire database as well as its individual instances.B. Database-wide analysis of global resources by ADDM for high-load SQL, global cache interconnect traffic, and skew in instance response times.C. ADDM X$ and V$ performance analysis and reports that compare the overall RAC Database to the sum of its individual database instances.D. ADDM recommendations inclusive of SAN and NFS mounted storage to pinpoint issues within the storage cache.E. ADDM's ability to review SNMP trap error messages and automatically open trouble tickets.



QUESTION 46An Oracle Database customer's VP of Development mentions that they've moved to AGILE development methodology and DevOps requires an ability to view, test,or validate performance in their own development environment. Which two do you implement?

A. Oracle Application Infrastructure TesterB. Oracle Application Testing SuiteC. SQL DeveloperD. Oracle Real Application TestingE. APEX and SQL DeveloperF. Oracle Testing Pack



QUESTION 47Which are three use cases in which SQL Performance Analyzer can be used?

A. find and flashback explain plan anomalies


B. simulate Exadata on existing hardwareC. forecast impact of a system change on a SQL workloadD. compare performance of SQL statements before and after a changeE. debug SQL code syntax before and after a changeF. JSQL Heap Memory overflow testing

Correct Answer: BCDSection: (none)Explanation


QUESTION 48SQL Access Advisor takes database workload as input and recommends adding various access structures. Which three does it consider the impact of addingwhen it generates recommendations?

A. Materialized viewsB. IndexesC. PartitionsD. TablespacesE. V$ performance viewsF. Hints



QUESTION 49Which is a true statement about Automatic Database Diagnostic Monitor (ADDM)?

A. ADDM analyzes information in RMAN.B. Automatic Workload Repository (AWR) analyzes information stored in snapshots in tables of ADDM.C. ADDM analyzes information stored in snapshots in tables of the Automatic Workload Repository (AWR).D. ADDM and AWR are new features of Oracle Database 12c.


E. APEX is required to access ADDM.



QUESTION 50Oracle databases come with a built-in health monitor to run diagnostic checks on components of the database. Which three capabilities can be used to automatereporting?

A. variety of real-time reports once the Business Intelligence option is installedB. reports in response to critical errorsC. reports with findings and recommendations to resolve problemsD. reports examining memory and process usageE. historical reports after the Database Diagnostic Repository (DDR) is configuredF. reports examining user and developer SQL programming errors



QUESTION 51For which one would you use an index fast full scan to improve performance?

A. a query having all the columns of an index in the where clauseB. a query that does not need to access table rowsC. a query that needs to access table rows along with an indexD. a column in an index that is compressed



Explanation/Reference:Explanation:All of the columns required by SQL must reside in the index tree; that is, all columns in the SELECT and WHERE clauses must exist in the index.Reference: http://www.dba-oracle.com/t_index_fast_full_scan.htm

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