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2021 Jun 1Z0-027 practice
Q31. Which two are true about the use of DBFS in a Database Machine environment?
A. DBFS must be used to bulk load data into a database on the Database Machine if the staging area requires Exadata based shared storage.
B. DBFS must be used to have a POSIX compliant shared storage solution that is accessible from the database servers on a Database Machine.
C. DBFS must be used to bulk load data into a production database on the Database Machine.
D. DBFSmust use the DBFS_DG diskgroup for any DBFS store.
E. DBFS must be used to have a POSIX-compliant Exadata-based shared storage solution.
Answer: AB
Q32. Which tool will provide you with diagnostic information for all the software log, trace files, and OS information on Database Machine?
A. dbmcheck.sh
B. diagget.sh
C. oswatcher
D. adrci
E. Enterprise Manager
Answer: B
Q33. Which three statements are true regarding the configuration of Auto Service Request (ASR) on your Database Machine?
A. HTTPS connectivity must be enabled from the ASK Manager host to the internet.
B. ASR Manager must be installed on one of the database servers.
C. Oracle Solaris must be used on the server where ASK Manager is installed.
D. SMTP must be enabled on at least one database server.
E. Oracle Linux must be used on the server where ASR Manager is installed
F. ASRManager may be installed on any type of server running Oracle Linux.
G. ASRManager may be installed on any type of server running Oracle Solaris.
Answer: AFG
Q34. Which three storage components are available after the standard initial Database machine deployment?
A. The DATA_<DBM_Name> ASM diskgroup
B. The RECO_<DBM_Name> ASM diskgroup
C. Mirrored system partitions on hard disk 0 and hard disk 1
D. The DBFS_DG diskgroup with external redundancy
E. Exadata Smart Flash Cache using all of the flashdisk space
Answer: ABD
Q35. You plan to monitor storage servers after configuring an I/O resource manager plan with directives for inter-database plans and intra-database plans.
Which two types if metrics would help assess the impact of the intra-database plans on I/O to the storage servers?
A. Category I/O
B. Database I/O
C. Resource Consumer Group I/O
D. Smart Flash Log I/O
E. Smart Flash Cache I/O
Answer: BC
Rebirth 1Z0-027 practice exam:
Q36. You have altered an index supporting a constraint to be invisible on a large read only data warehouse table, to determine it Smart Scan operations will be fast enough to satisfy your performance requirements.
Given the results of your testing, you consider dropping the index.
Which two statements are true?
A. You must retain the index and set the constraint to DISABLE NOVALIDATE RELY to enforce the constraint
B. You may drop the index and use a constraint with the DISABLE NOVALIDATE RELYflags
C. You must retain the index and make it visible again for the constraint to be enforced.
D. You may drop the index and make the constraint invisible, because this is enough for the constraint to be enforced.
E. You may retain the index, and leave it as invisible, because this is enough for the constraint to be recognized.
Answer: AC
Q37. Which four statements are true about Exadata Smart Flash Cache?
A. Smart Scan will always be done for I/Os to flash based griddisks.
B. Flash based ASM diskgroups may share space with the Flash Cache on the flashdisks.
C. Single block reads can benefit from Smart Flash Cache.
D. Smart Scan will never be done for I/Os to flash based griddisks.
E. Multiblock reads can benefit from Smart Flash Cache.
F. Smart Flash Logs reduce the size of Smart Flash Cache.
Answer: BCEF
Q38. Which two are regarding the case of storage indexes?
A. To increase the chance of using the a storage index, you can make table indexes invisible.
B. To maximize the benefit of storage Indexes, load your data stored on the filtered columns.
C. The cell physical 10 bytes saved by storage index statistic returns multiple rows, one for each storage server.
D. Storage indexes are retained after a cell is rebooted.
E. Avoid the use of bind variables because Storage Indexes do not work with bind variables.
Answer: BE
Q39. Identify two permitted uses of external InfiniBand connections to a Database Machine.
A. To connect an ExaLogicElastic CloudMachine
B. To monitor the InfiniBand network using Enterprise Manager
C. To connect an external tape library
D. To use a bonded client access network
E. To use a bonded management network
Answer: AB
Q40. Which three are true regarding the use of Storage Indexes?
A. Different storage regions may have different columns indexed for the same table.
B. A Storage index is automatically maintained by CELLSRV based on the filter columns of the offload SQL.
C. The use of Storage indexes for a particular database can be disabled by using an I/O Resource Manager Database Plan.
D. Storage Indexes occupy space in the Smart Flash Cache.
E. The use of Storage Indexes for particular categories of I/O can be disabled by using an I/O Resource Manager Category Plan.
F. A maximum of eight table columns for any table are Indexed per storage region.
Answer: BCF