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2021 Jul 1Z0-027 practice exam

Q11. Which type of network traffic is transported over the internal InfiniBand network in a Database Machine? 

A. IDB protocol traffic only 

B. Both Clustered ASM and RAC database instance traffic 

C. Clustered ASM Instance traffic only 

D. RAC database instance traffic only 

E. IDB protocol traffic,Clustered ASM traffic, and RAC database instance traffic 

Answer: A 

Q12. Which three factors should you consider when choosing a method for migrating a database to the Database Machine? 

A. Typeof database workload 

B. Number of tablespaces in the source database 

C. Size of the source database 

D. Endian format of the source database 

E. ASM attributes and allocation unit (AU) size of the diskgroups used by the source database 

Answer: ACD 

Q13. A table in one of your database schemas contains only varchar, number, and date data types for the columns. 

Which three operations can be offloaded to the Exadata storage servers when doing a smart scan against this table, if no other situations arise that prevent Smart Scan from occurring? 

A. Column filtering 

B. Sort merge join filtering 

C. Predicate filtering 

D. Nested loop Join filtering 

E. Hash join filtering 

F. Virtual column filtering 

Answer: ACF 

Q14. You recently upgraded your Exadata image to the latest release; previously you were using 

At the same time, you decide to address some performance problems as follows: 

You noticed increased latency for the database log writer, especially during the quarterly battery learn cycle on the cells. 

You have complaints of erratic performance from certain write-intensive applications. 

Which two actions could improve performance in these areas? 

A. Enable write-back flashcache by setting lunWriteCacheMode to Write Back Mode. 

B. Use ALTER TABLE in the database to set CELL_FLASH_CACHE = KEEP for the tables belonging to the affected application. 

C. Configure Smart Flash Log on the cells to use some of these of the space on the cell flash devices. 

D. Configure the table belonging to the affected application using CELLCLI, to the set CELL_FLASH_CACHE = KEEP. 

E. Configure Smart Flash Log on the database server to use server flash memory. 

Answer: BC 

Q15. You plan to migrate an Oracle database that supports an online transaction processing (OLTP) workload to your Database Machine. 

Following are details for the source database: Database version: 10.2.0 

Byte order: Big Endian HP-UX (64-bit) 

Database size: 24 TB 

Storage: ASM with 1 MB allocation unit size 

Which two are supported migration methods? 

A. Physical migration using ASM online Migration 

B. Physical migration using Transportable Database 

C. Logical migration using Oracle Streams 

D. Local migration using Oracle Streams 

E. Logical migration using logical standby 

Answer: BC

Down to date 1Z0-027 free practice questions:

Q16. You have two very large databases supporting OLTP workloads which run on multiple small-blade style servers in a cluster and which require optimal latency for I/O. 

You plan to migrate them to a Database Machine once a capacity planning exercise is finished. 

The database backup strategy requires that backups are written directly to media. 

High availability requirements state that you must be able to survive node failures at any time. 

Which three Database Machine components or features would you recommend to support these requirements? 

A. Use of write back flash cache 

B. Use of smart flash logs 

C. High capacity disks in the Database Machine 

D. High performance disks in the Database Machine 

E. A high capacity expansion full rack 

F. A high performance expansion full rack 

Answer: BDE 

Q17. You plan to migrate an existing production database supporting online transaction processing (OLTP) workloads to the Exadata Database Machine. The database currently supports an application requiring fast response times, which satisfies stringent requirements, and most of the application queries use index access to the tables in the application schema. 

For which case would you consider dropping indexes to allow Smart Scans to occur? 

A. Drop non-constraint indexes if Smart Scan occurs instead of an index access path on the corresponding table. 

B. Drop non-constraint indexesif Smart Scan performs better than index unique scans on the corresponding table. 

C. Drop non-constraint indexes if Smart Scan performs better than index range scans on the corresponding table. 

D. Drop non-constraint Indexes if Smart Scan performs better than any index scans on the corresponding table. 

Answer: D 

Q18. 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 

Q19. Identify three valid configuration options that can be implemented during the initial configuration process of a new Database Machine by using the Exadata Deployment Assistant 

A. database character set 

B. size of the RECO ASM diskgroup 

C. size of the DBFS diskgroup 

D. O/S owner mode (standard O/S authentication or role-separated O/S authentication) 

E. RDBMS DBA group name 

Answer: BDE 

Q20. Your customer wants you to partition the database and storage grids in his X3-2 full rack, creating database clusters and two storage grids. 

One cluster will be used for production and should consist of 6 databases servers and 11 cells from the first storage grid. 

The other cluster will be used for test and development, and should consist of 2 database servers and 3 cells from the second storage grid. 

The storage must be partitioned so that the cells are visible only to the appropriate database servers based on the description above. 

What must be done to achieve this? 

A. Configure Exadata realms using Oracle ASM scoped security mode. 

B. Configure Exadata realms using Database scoped security mode. 

C. Edit the CELLIP.ORA file on each database server to contain IP addresses of cells in the storage grid associated with cluster to which that database server belongs. 

D. Edit the CELLINIT.ORA file on each database server to contain IP addresses of cells in the storage grid associated with the cluster to which that database server belongs. 

E. Edit the CELLIP.ORA file on each database server to contain IP addresses of database servers which are allowed access to specific cells in the same storage grid. 

F. Edit the CELLIP.ORA file on each cell to contain IP addresses of database servers in the database server grid that are associated with the storage grid to which that cell belongs. 

Answer: C