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Certifications: Oracle Engineered Systems
Exam Name: Oracle Exadata Database Machine and Cloud Service 2017 Implementation Essentials
Exam Code: 1z0-338
Total Questions: 72
♥ 2018 Valid 1z0-338 Exam Questions ♥
1z0-338 exam questions, 1z0-338 PDF dumps; 1z0-338 exam dumps:: https://www.dumpsschool.com/1z0-338-exam-dumps.html (72 Q&A) (New Questions Are 100% Available! Also Free Practice Test Software!)
Latest and Most Accurate Oracle 1z0-338 Dumps Exam Questions and Answers:
Which is a best practice for High Availability (HA) in an Exadata environment?
A. Checksums performed on the Exadata Storage Server ensure logical consistency of block content.
B. When a standby database is in place, DB_BLOCK_CHECKING is not required and thus not recommended.
C. Oracle Exadata Storage Server Software HARD checks operate transparently after enabling DB_BLOCK_CHECKSUM on a database.
D. Due to the different architecture that Exadata has with storage servers, compared to regular Storage Area Network, DB_LOST_WRITE_PROTECT need not be set.
E. Stretched RAC is the best alternative for Exadata that combines both HA and DR into one.
Exadata storage cells include Oracle Hardware Assisted Resilient Data (HARD) to provide a unique level of validation for Oracle block data structures such as data block address, checksum.
and magic numbers prior to allowing a write to physical disks. HARD validation with Exadata is automatic (setting DB_BLOCK_CHECKSUM is required to enable checksum validation). The HARD checks transparently handle all cases including Oracle ASM disk rebalance operations and disk failures.
Not A: The checksum is used to validate that a block is not physically corrupt, detecting corruptions caused by underlying disks, storage systems, or I/O systems. Checksums do not ensure logical consistency of the block contents.
Not B: MAA recommends that you set DB_BLOCK_CHECKING=MEDIUM or FULL on the physical standby as a minimum practice to prevent the standby from various logical block corruptions.
Not D: The recommendation is:
On the primary database: DB_LOST_WRITE_PROTECT=TYPICAL (default TYPICAL on Exadata)
On the Data Guard Physical Standby Database: DB_LOST_WRITE_PROTECT=TYPICAL
Not E: Protection from a broad range of, but not all disasters
While not a full disaster recovery (DR) solution, an Extended Distance
Oracle RAC or Oracle RAC One Node deployment will provide protection from a broad range of
disasters. For a full DR protection Oracle recommends deploying an Oracle RAC together with a local and a remote Oracle Data Guard setup as described in the Maximum Availability Architecture (MAA).
Which Exadata feature uses Flash as a parallel write cache to Disk Controller Cache?
A. Exadata DRAM
B. InfiniBand network cache
C. high performance SAS disks
D. Smart Flash Log
E. Hybrid Columnar Compression
A customer has three databases named CC. FIN, and DW. The CC database is for their CallCenter. Even a slight decrease in the response time of the database would mean more people “on hold” in their data center. The orders received through the CallCenter are stored in the Finance (FIN) database. Both databases, CC and FIN, serve as sources for the Data Warehouse (DW) database. All databases use the same Automatic Storage Management (ASM) diskgroup and therefore, the same physical disks on Exadata storage. The customer wants to dynamically control the resources that are available for the CallCenter database because this has direct impact on their operations?
Which option should be implemented?
A. DBRM on the CC database
B. DBRM on all the databases
C. IORM, because DBRM cannot be changed for an existing session
D. IORM and DBRM
Consider the following software changes that are performed manually on a Linux server:
1. Changes for Linux kernel firewall configuration
2. Changes for custom performance monitoring tools
3. Changes for security scan tools
4. Changes for Linux system performance optimization
Which of the software changes listed are permitted on Exadata Storage Servers?
A. 1, 2, 3, and 4
B. only 3 ‘
D. only 2
E. only 1 and 2
F. only 2 and 3
1: The Storage Server Patch is responsible for keeping our cell nodes always up-to-date, fixing possible problems, and this patch includes different component patches, like kernel patches, firmware, operation system, etc… for the Storage Server.
3,4: security scan tools changes and Linux system performance optimization changes would be on the database server.
Which two statements are true about enabling write-back flash cache?
A. When enabling write-back flash cache in a non rolling manner, it is important to ensure that asmdeactivatonoutcome is set to YES and asmModestatus is set to ONLINE for all grid disks.
B. Before using write-back flash cache, you need to verify the minimum required versions.
C. Before write back-flash cache is enabled, you need to drop the Flash Cache first.
D. The setting flashCacheMode should be set to writeback by updating cellinit.ora and restarting cellsrv.
E. When enabling write-back flash cache in a rolling manner, dcli should be used to inactivate the grid disks on all cells first.
Answer: B, C
B: Exadata storage version 184.108.40.206.1 is the minimum version required to use this write back flash cache option.
C: Steps for Enabling Write back flash cache:
First of all, you don’t need the stop CRS or database (This is ROLLING method) ,you can do it cell by cell.
* drop flashcache
* Be sure asmdeactivationoutcome is YES is before disabling grid disk
Consider the following setup:
User A1 belongs to resource group High on Database A.
User B2 belongs to resource group Low on Database B.
User C3 is a user on Database C without any DBRM setup.
Database A: Resource group High gets 80% and Low gets 20%.
Database B: Resource group High gets 60% and Low gets 40%.
Database A: Share=20, limit=5
Database B: Share=30, limit=10
Database C: 5 shares
Total number of shares in the IORM setup = 100
What percent of I/O will each database user theoretically be using when the Exadata storage unit I/O throughout is used 100% and no other databases but A, B, and C are running?
A. Al = 36%, B2=18%, and C3=9%
B. Al = 33%, B2=33%, and C3=33%
C. AI = 10%, B2=5%, and C3=20%
D. Al = 8%, B2=12%, and C3=5%
E. Al = 5%, B2=10%, and C3=85%
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