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2016 Dec 1Z0-027 training

Q21. You are evaluating the performance of a SQL statement that accesses a very large table, and have run the following query producing the output shown: 

For which two reasons would the; “physical read total bytes” statistic be greater than the “cell physical IO bytes eligible for predicate offload” statistic? 

A. There is an index on the column used in the where clause, causing “cell multiblock physical reads” to be requested by the database instance, resulting in additional I/O for blocks in the cells. 

B. The table is an IOT and has an overflow segment, causing “cell multiblock physical reads” to be requested by the database instance, resulting in additional I/O for block in the cells. 

C. There is an uncommitted transaction that has modified some of the table blocks, causing some “cell single block physical reads” to be requested by the database instance, resulting in additional I/O for block in the cells. 

D. The table is an indexed clustered table, causing “cell single block physical reads” to be requested by the database instance, resulting in additional I/O forblocks in the cells. 

E. There are migrated rows in the table, causing some “cell single block physical reads” to be requested by the database instance, resulting in additional I/O for blocks in the cells. 

Answer: BE 


Q22. Which two communication methods are used by which components in the Enterprise manager Architecture for the Database Machine? 

A. SNMP traps for alerts are sent by the storage server ILOM to the storage serverMSprocess 

B. SNMP traps for alerts are sent by the storage serverMSprocess to the storage server ILOM 

C. SNMP traps for alerts are sent by the storage serverILOMto the Enterprise Manageragent. 

D. SNMP traps for alerts are sent by the storage serverMSprocess to the enterprise Manageragent 

E. SNMP traps for alerts are sent by the storage server ILOM to the storage server RS process. 

Answer: AD 


Q23. 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 


Q24. 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 


Q25. You are monitoring and evaluating a create index statement on your Database Machine and have run the following query after executing statement, providing the output. Shown: 

Select two reasons why the statement would have produced so many “cell single block physical read” waits compared to “cell smart table scan” waits. 

A. There are huge numbers of migrated rows in the table on which the index is being built. 

B. There is an uncommitted transaction that has modified one block of the table on which the index is being built, in each cell. 

C. Thereis a transaction that has modified one block of the table on which the index is being built in each cell, which committed after the create index began. 

D. There are huge numbers of chained rows in the table on which the index is being built. 

E. There is a ROWID column in the table on which the index is being built. 

Answer: AD 


Replace 1Z0-027 free practice test:

Q26. Which two activities are supported on the storage servers in the Database Machine? 

A. Installing an alternative package manager 

B. configuring secure shell user equivalency for the callmonitor user 

C. changing root password 

D. upgrading the Storage Server software package using RPN 

E. upgrading a device driver for hard disks when inserting a replacement disk after a hard disk failure 

Answer: AD 


Q27. 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:


Q28. Which three statements are true about the initial storage configuration after the standard deployment of a new database Machine? 

A. The Data_<DBM_Name> and RECO_<DBM_Name> ASM diskgroups are built on part of the interleaved griddisks. 

B. The Data_<DBM_Name> and RECO_<DBM_Name> ASM diskgroups are built on top of the non-interleaved griddisks. 

C. There is a free space available on the hard disks inside the database servers for possible extension of the /u01 file system. 

D. There is no free disk space available on the hard disk inside the database servers for possible extensions of the /u01 file system. 

E. There is free space available on the flashdisk inside the Exadata storage servers for possibleuseas flash-based griddisks. 

F. There isnofree disk available on the flashdisk inside the Exadata storage servers forpossible use as flash-based griddisks. 

Answer: BCF 


Q29. Which two are true concerning the allocation of I/O resources by the IORM within the CELLSRV process? 

A. Control File I/O is managed automatically at high priority by IORM. 

B. Control File I/O is considered part of the SYSTEM resource Consume group by IORM. 

C. Log Writer I/O to the Smart Flash Log is considered part of the SYSTEM resource consumer group by IORM. 

D. Log Writer I/O to the Smart Flash Log is managed automatically at high priority by IORM. 

E. Database Writer I/O is managed automatically at normal priority by IORM. 

F. Database Writer I/O is considered part of the SYSTEM resource consumer group by IORM. 

Answer: AE 


Q30. You have configured a multi-rack Database Machine with two X3-8 full racks all in a single cluster and storage grid. 

Which two are true regarding the servers on which Enterprise manager agents must be deployed in order to monitor all components of the multi-rack Database Machine? 

A. On only one database server in the first rack 

B. On all storage servers in all racks 

C. On at least two storage servers in the first rack 

D. On all database servers in thefirstrack 

E. On only one database server in second rack 

F. On all database servers in second rack 

G. On at least two storage servers in the second rack 

Answer: DF