Amazon Web Services dumpsboss changed Dbs-c01 Exam Questions by Ares q243 vce pdf

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Exam Name:	AWS Certified Database - Specialty
Exam Code:	DBS-C01 Dumps
Vendor:	Amazon Web Services	Certification:	AWS Certified Database
Questions:	324 Q&A's	Shared By:	ares

Question 56

A company stores critical data for a department in Amazon RDS for MySQL DB instances. The department was closed for 3 weeks and notified a database specialist that access to the RDS DB instances should not be granted to anyone during this time. To meet this requirement, the database specialist stopped all the

DB instances used by the department but did not select the option to create a snapshot. Before the 3 weeks expired, the database specialist discovered that users could connect to the database successfully.

What could be the reason for this?

Options:

When stopping the DB instance, the option to create a snapshot should have been selected.

When stopping the DB instance, the duration for stopping the DB instance should have been selected.

Stopped DB instances will automatically restart if the number of attempted connections exceeds the threshold set.

Stopped DB instances will automatically restart if the instance is not manually started after 7 days.

Discussion

Question 57

A company is running a website on Amazon EC2 instances deployed in multiple Availability Zones (AZs). The site performs a high number of repetitive reads and writes each second on an Amazon RDS for MySQL Multi- AZ DB instance with General Purpose SSD (gp2) storage. After comprehensive testing and analysis, a database specialist discovers that there is high read latency and high CPU utilization on the DB instance.

Which approach should the database specialist to take to resolve this issue without changing the application?

Options:

Implementing sharding to distribute the load to multiple RDS for MySQL databases.

Use the same RDS for MySQL instance class with Provisioned IOPS (PIOPS) storage.

Add an RDS for MySQL read replica.

Modify the RDS for MySQL database class to a bigger size and implement Provisioned IOPS (PIOPS).

Discussion

Question 58

An ecommerce company has tasked a Database Specialist with creating a reporting dashboard that visualizes critical business metrics that will be pulled from the core production database running on Amazon Aurora. Data that is read by the dashboard should be available within 100 milliseconds of an update.

The Database Specialist needs to review the current configuration of the Aurora DB cluster and develop a

cost-effective solution. The solution needs to accommodate the unpredictable read workload from the reporting dashboard without any impact on the write availability and performance of the DB cluster.

Which solution meets these requirements?

Options:

Turn on the serverless option in the DB cluster so it can automatically scale based on demand.

Provision a clone of the existing DB cluster for the new Application team.

Create a separate DB cluster for the new workload, refresh from the source DB cluster, and set up ongoing replication using AWS DMS change data capture (CDC).

Add an automatic scaling policy to the DB cluster to add Aurora Replicas to the cluster based on CPU consumption.

Discussion

Question 59

A large financial services company uses Amazon ElastiCache for Redis for its new application that has a global user base. A database administrator must develop a caching solution that will be available

across AWS Regions and include low-latency replication and failover capabilities for disaster recovery (DR). The company's security team requires the encryption of cross-Region data transfers.

Which solution meets these requirements with the LEAST amount of operational effort?

Options:

Enable cluster mode in ElastiCache for Redis. Then create multiple clusters across Regions and replicate the cache data by using AWS Database Migration Service (AWS DMS). Promote a cluster in the failover Region to handle production traffic when DR is required.

Create a global datastore in ElastiCache for Redis. Then create replica clusters in two other Regions. Promote one of the replica clusters as primary when DR is required.

Disable cluster mode in ElastiCache for Redis. Then create multiple replication groups across Regions and replicate the cache data by using AWS Database Migration Service (AWS DMS). Promote a replication group in the failover Region to primary when DR is required.

Create a snapshot of ElastiCache for Redis in the primary Region and copy it to the failover Region. Use the snapshot to restore the cluster from the failover Region when DR is required.

Discussion

Answer:

Explanation:

Explanation:

Correct Answer: B

Explanation from Amazon documents:

Amazon ElastiCache for Redis is a fully managed in-memory data store that supports Redis, an open source, key-value database. Amazon ElastiCache for Redis provides several features to enhance the performance, availability, scalability, and security of your Redis data, such as cluster mode, global datastore, replication groups, snapshots, and encryption.

A global datastore is a feature that allows you to create a cross-Region read replica of your ElastiCache for Redis cluster. A global datastore consists of a primary cluster that is replicated across up to two other Regions as secondary clusters. A global datastore provides low-latency reads and high availability for your Redis data across Regions. A global datastore also supports encryption of cross-Region data transfers using AWS Key Management Service (AWS KMS).

To create a global datastore in ElastiCache for Redis, you need to do the following:

Create a primary cluster in one Region. You can use an existing cluster or create a new one. The cluster must have cluster mode enabled and use Redis engine version 5.0.6 or later.
Create a global datastore and add the primary cluster to it. You can use the AWS Management Console, the AWS CLI, or the ElastiCache API to create a global datastore.
Create one or two secondary clusters in other Regions and add them to the global datastore. The secondary clusters must have the same specifications as the primary cluster, such as node type, number of shards, and number of replicas per shard.
Enable encryption in transit and at rest for the primary and secondary clusters. Specify a customer master key (CMK) from AWS KMS for each cluster.

By creating a global datastore in ElastiCache for Redis and creating replica clusters in two other Regions, the database administrator can develop a caching solution that will be available across Regions and include low-latency replication and failover capabilities for DR. This solution will also meet the security requirement of encrypting cross-Region data transfers using AWS KMS. This solution will also require the least amount of operational effort, as it does not involve any data migration or manual intervention.

Therefore, option B is the correct solution to meet the requirements. Option A is not optimal because enabling cluster mode in ElastiCache for Redis and creating multiple clusters across Regions will not provide cross-Region replication or failover capabilities. Using AWS DMS to replicate the cache data by using AWS DMS will incur additional time and cost, and may not support encryption of cross-Region data transfers. Option C is not optimal because disabling cluster mode in ElastiCache for Redis and creating multiple replication groups across Regions will not provide cross-Region replication or failover capabilities. Using AWS DMS to replicate the cache data will incur additional time and cost, and may not support encryption of cross-Region data transfers. Option D is not optimal because creating a snapshot of ElastiCache for Redis in the primary Region and copying it to the failover Region will not provide low-latency replication or high availability for the Redis data across Regions. Using the snapshot to restore the cluster from the failover Region when DR is required will involve manual intervention and downtime.

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