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NEW QUESTION: 1
A new private cloud platform is being deployed by an engineer. SLA requirements state that any clusters should have a baseline redundancy sufficient to handle the failure of at least two hosts. The engineer records the following metrics after the deployment:
Which of the following metrics is MOST likely to represent a violation of SLA?
A. RAM utilization
B. CPU utilization
C. NIC utilization
D. Disk utilization
Answer: D
NEW QUESTION: 2
Which are the two prerequisites for enabling star transformation on queries?
A. A B-tree index should be built on each of the foreign key columns of the fact table(s),
B. A bitmap index should be built on each of the primary key columns of the fact table(s).
C. The STAR_TRANSFORMATION_ENABLED parameter should be set to TRUE or TEMP_DISABLE.
D. A bitmap index should be built on each of the foreign key columns of the fact table(s).
E. A bitmap index must exist on all the columns that are used in the filter predicates of the query.
Answer: C,E
Explanation:
A: Enabling the transformation
E: Star transformation is essentially about adding subquery predicates corresponding to the
constraint dimensions. These subquery predicates are referred to as bitmap semi-join predicates. The transformation is performed when there are indexes on the fact join columns (s.timeid, s.custid...). By driving bitmap AND and OR operations (bitmaps can be from bitmap indexes or generated from regular B-Tree indexes) of the key values supplied by the subqueries, only the relevant rows from the fact table need to be retrieved. If the filters on the dimension tables filter out a lot of data, this can be much more efficient than a full table scan on the fact table. After the relevant rows have been retrieved from the fact table, they may need to be joined back to the dimension tables, using the original predicates. In some cases, the join back can be eliminated.
Star transformation is controlled by the star_transformation_enabled parameter. The parameter takes 3 values.
TRUE - The Oracle optimizer performs transformation by identifying fact and constraint dimension tables automatically. This is done in a cost-based manner, i.e. the transformation is performed only if the cost of the transformed plan is lower than the non-transformed plan. Also the optimizer will attempt temporary table transformation automatically whenever materialization improves performance.
FALSE - The transformation is not tried.
TEMP_DISABLE - This value has similar behavior as TRUE except that temporary table transformation is not tried.
The default value of the parameter is FALSE. You have to change the parameter value and create indexes on the joining columns of the fact table to take advantage of this transformation.
Reference: Optimizer Transformations: Star Transformation
NEW QUESTION: 3
When collecting personal data in a European Union (EU) member state, what must a company do if it collects personal data from a source other than the data subjects themselves?
A. Upgrade security to match that of the source
B. Provide a public notice regarding the data
C. Inform the subjects about the collection
D. Update the data within a reasonable timeframe
Answer: C
NEW QUESTION: 4
A company has built a web service that runs on Amazon EC2 instances behind an Application Load Balancer (ALB) the company has deployed the application in us-east-1 Amazon Route 53 provides an external DNS that routes traffic from example.com to the application, created with appropriate health checks.
The company has deployed a second environment for the application in eu-west-1 the company wants traffic to be routed to whichever environment results m the best response time for each user. If there is an outage in one Region, traffic should be directed to the other environment.
Which configuration will achieve this requirements?
A. A subdomain us.example.com with failover routing the US ALB as primary and the EU ALB as secondary
* Another subdomain eu.example.com with failover routing the EU ALB as primary and the US ALB as secondary
* Latency-based routing records for example com that are aliased to us example com and eu.example.com
B. A subdomain us.example.com with multivalue answer routing. the US ALB as first and the EU ALB as second
* Another subdomain eu.example.com with failover routing the EU ALB as first and the US ALB as second
* Failover routing records for example.com that are aliased to us.example.com and eu.example.com
C. A subdomain us example com with latency-based routing the US ALB as the first target and the EU ALB as the second target.
* Another subdomain eu.example.com with latency-based routing. The EU ALB as the first target and the US ALB as the second target.
* Failover routing records for example.com aliased to us.example.com as the first target and eu.example.com as the second target.
D. A subdomain us example com with weighted routing the US ALB with weight 2 and the EU ALB with weight 1
* Another subdomain eu.example.com with weighted routing the EU ALB with weight 2 and the US ALU with weight 1
* Geolocation routing records for example.com North America aliased to us example.com and Europe aliased to eu.example.com
Answer: C