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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 three statements are true about Automatic Degree of Parallelism (Auto DOP) on Exadata?
A. Auto DOP is an exclusive feature in Exadata, which allows the database optimizer to evaluate each statement and run it in parallel without special hints.
B. Auto DOP is disabled by default and must be enabled before SQL statements can take advantage of its features.
C. Auto DOP is enabled by default on Oracle 11gR2, allowing full use of its features.
D. Oracle’s Auto DOP algorithms calculate the Degree of Parallelism based on the table’s block counts.
E. SQL statements that take advantage of Auto DOP am be identified by using data from Oracle Automatic Workload Repository (AWR) or Enterprise Manager’s Monitored SQL Executions page.
B (not c): To enable the features in 11g Release 2, use the parallel_degree_policy parameter (by default this stuff is off – parameter is set to manual). For Auto DOP, setting this to limited is sufficient. If you want more functionality (in-memory parallel processing and parallel statement queuing parallel_degree_policy should be set to auto).
* What if you don’t have Exadata? Chances are that if your system is large enough to warrant Auto DOP, it is similar enough to Exadata to behave nicely with this number.
* Auto DOP is only useful in systems with enough CPUs and disks to make concurrent parallel processing feasible. It was designed mostly for Exadata, or for systems of similar size. 48 CPUs and 84 disks sound like a nice start
Which two statements are true about Exadata memory capabilities?
A. X3-8 can be purchased in a Half Rack configuration with 2 TB of memory.
B. X3-2 memory can be expanded to 512 GB per node from 256 GB.
C. X3-2 memory can be upgraded to use Flash in the compute nodes.
D. X3-8 memory is fixed at 4 TB per a Rack.
E. X3-2 can be purchased in a Half Rack configuration with 256 GB per node.
Answer: D, E
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 126.96.36.199.1 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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