Exam AWS Certified Data Engineer - Associate DEA-C01 All Questions

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Exam AWS Certified Data Engineer - Associate DEA-C01 topic 1 question 26 discussion

Exam question from Amazon's AWS Certified Data Engineer - Associate DEA-C01

Question #: 26
Topic #: 1

[All AWS Certified Data Engineer - Associate DEA-C01 Questions]

A company is planning to use a provisioned Amazon EMR cluster that runs Apache Spark jobs to perform big data analysis. The company requires high reliability. A big data team must follow best practices for running cost-optimized and long-running workloads on Amazon EMR. The team must find a solution that will maintain the company's current level of performance.
Which combination of resources will meet these requirements MOST cost-effectively? (Choose two.)

A. Use Hadoop Distributed File System (HDFS) as a persistent data store.
B. Use Amazon S3 as a persistent data store.
C. Use x86-based instances for core nodes and task nodes.
D. Use Graviton instances for core nodes and task nodes.
E. Use Spot Instances for all primary nodes.

Show Suggested Answer

Suggested Answer: BD 🗳️

by [deleted] at Jan. 21, 2024, 3:03 a.m.

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Highly Voted 1 year, 1 month ago

Selected Answer: BD

HDFS is not recommended for persistent storage because once a cluster is terminated, all HDFS data is lost. Also, long-running workloads can fill the disk space quickly. Thus, S3 is the best option since it's highly available, durable, and scalable. AWS Graviton-based instances cost up to 20% less than comparable x86-based Amazon EC2 instances: https://aws.amazon.com/ec2/graviton/

upvoted 9 times

BartoszGolebiowski24

1 year ago

If you are using instance storage this is true, but you can use EBS instead of instance storage. EBS has better performance than s3 for HDFS. This is the keyword from question, so EBS > S3 I would rather select AD.

upvoted 1 times

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sam_pre

Most Recent 4 months, 3 weeks ago

Selected Answer: BD

Cost effective + high reliability > S3 Gravitation > Low cost

upvoted 1 times

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ttpro1995

8 months ago

Selected Answer: BD

Rule of thumb: pick the AWS in-house solution provided for that service. Graviton is aws processor, and also EMRFS on S3.

upvoted 1 times

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pypelyncar

8 months, 2 weeks ago

Selected Answer: BD

s3 no question. Graviton=> Cost-Effectiveness: Graviton instances are ARM-based instances specifically designed for cloud workloads. They offer significant cost savings compared to x86-based instances while delivering comparable or better performance for many Apache Spark workloads. Performance: Graviton instances are optimized for Spark workloads and can deliver the same level of performance as x86-based instances in many cases. Additionally, EMR offers performance-optimized versions of Spark built for Graviton instances.

upvoted 3 times

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okechi

10 months, 1 week ago

My answer is BE

upvoted 1 times

chris_spencer

10 months ago

E is incorrect, Spot instances does not provide high reliability as required by the company.

upvoted 4 times

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certplan

11 months ago

A. - AWS recommends using Amazon S3 as a persistent data store for Amazon EMR due to its scalability, durability, and cost-effectiveness. Storing data in HDFS would require managing and maintaining additional infrastructure, which may incur higher costs in terms of storage, management, and scalability compared to using Amazon S3. AWS documentation emphasizes the benefits of integrating Amazon EMR with Amazon S3 for cost optimization and efficiency. D. - While Graviton instances may offer cost savings in certain scenarios, they might not always be the most cost-effective option depending on the specific workload requirements and availability of compatible software. x86-based instances are more commonly supported by a broader range of software and frameworks, which could result in better performance and compatibility in some cases. Additionally, AWS documentation on instance types and pricing can provide insights into the cost-effectiveness of Graviton instances compared to x86-based instances.

upvoted 2 times

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GiorgioGss

11 months, 2 weeks ago

Selected Answer: BD

B and D.

upvoted 3 times

nyaopoko

10 months, 3 weeks ago

yes BD is answer

upvoted 1 times

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