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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Data Ingestion and Transformation | 34% | - Implement data quality and validation - Ingest data from various sources
|
| Topic 2: Data Store Management | 26% | - Manage data lifecycle and storage tiers - Optimize storage performance and cost - Design and implement data storage solutions
|
| Topic 3: Data Security and Governance | 18% | - Encrypt data at rest and in transit - Protect sensitive data - Enforce compliance and data governance
|
| Topic 4: Data Operations and Support | 22% | - Automate operational tasks - Ensure reliability and scalability - Backup, restore, and disaster recovery - Monitor and troubleshoot data pipelines
|
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NEW QUESTION # 92
A global ecommerce company processes customer transactions, inventory updates, and user activity logs across multiple AWS services. The company needs a scalable, fully managed, and event-driven orchestration solution to coordinate complex extract, transform, and load (ETL) workflows. The solution must use AWS Glue and Amazon EMR to process data. The data will be stored in Amazon Redshift and Amazon S3. The solution must support dependency management, automated retries, and data pipeline monitoring.
Which solution will meet these requirements?
Answer: D
Explanation:
Option C is the best answer because Amazon MWAA is a fully managed Apache Airflow service built specifically for workflow orchestration. Airflow uses Directed Acyclic Graphs (DAGs) to model task dependencies, which directly satisfies the requirement for dependency management. Amazon MWAA also supports orchestration across AWS analytics services such as Amazon S3, Amazon Redshift, and Amazon EMR, making it a natural fit for complex ETL pipelines. AWS documentation describes workflow definitions, tasks, and Airflow-based orchestration as core MWAA concepts.
This choice is stronger than A because the question specifically asks for orchestration of complex ETL workflows with dependency management, retries, and monitoring across multiple data-processing systems.
While AWS Step Functions is an orchestration service, the option specifies an express workflow, and AWS states that Express Workflows are designed for high-volume, short-duration runs and can run for only up to five minutes, which is often not the best fit for longer-running ETL jobs on EMR and Glue.
The uploaded study material also points to orchestration services for dependent ETL jobs and identifies both Step Functions and workflow orchestration concepts as core exam knowledge, but for this exact multi-step ETL orchestration pattern, MWAA with DAGs is the most precise match.
NEW QUESTION # 93
A data engineer is creating a product recommendation system that requires vector search across 5 million product embeddings with 768 dimensions. The system must prioritize search accuracy and maintain search latency under 100 milliseconds. The data engineer wants to implement a k-nearest neighbors (k-NN) vector index in Amazon OpenSearch Service.
Which vector index type should the data engineer use?
Answer: B
Explanation:
The correct answer is B because HNSW with the Faiss engine is the best fit when the system needs approximate k-NN search over millions of high-dimensional vectors while maintaining low latency and strong recall. OpenSearch approximate k-NN is designed for large, high-dimensional datasets where brute-force exact search becomes inefficient, and OpenSearch documentation shows HNSW configured with the Faiss engine for knn_vector fields. Exact search with a scoring script is accurate but does not scale well for 5 million vectors under a strict latency requirement. IVF can scale but usually requires training and tuning and may trade off recall. Binary quantization reduces memory but can reduce accuracy. Therefore, HNSW with Faiss is the strongest exam answer.
NEW QUESTION # 94
A company currently uses a provisioned Amazon EMR cluster that includes general purpose Amazon EC2 instances. The EMR cluster uses EMR managed scaling between one to five task nodes for the company's long-running Apache Spark extract, transform, and load (ETL) job. The company runs the ETL job every day.
When the company runs the ETL job, the EMR cluster quickly scales up to five nodes. The EMR cluster often reaches maximum CPU usage, but the memory usage remains under 30%.
The company wants to modify the EMR cluster configuration to reduce the EMR costs to run the daily ETL job.
Which solution will meet these requirements MOST cost-effectively?
Answer: C
NEW QUESTION # 95
A company is migrating on-premises workloads to AWS. The company wants to reduce overall operational overhead. The company also wants to explore serverless options.
The company's current workloads use Apache Pig, Apache Oozie, Apache Spark, Apache Hbase, and Apache Flink. The on-premises workloads process petabytes of data in seconds. The company must maintain similar or better performance after the migration to AWS.
Which extract, transform, and load (ETL) service will meet these requirements?
Answer: D
Explanation:
AWS Glue is a fully managed serverless ETL service that can handle petabytes of data in seconds. AWS Glue can run Apache Spark and Apache Flink jobs without requiring any infrastructure provisioning or management. AWS Glue can also integrate with Apache Pig, Apache Oozie, and Apache Hbase using AWS Glue Data Catalog and AWS Glue workflows. AWS Glue can reduce the overall operational overhead by automating the data discovery, data preparation, and data loading processes. AWS Glue can also optimize the cost and performance of ETL jobs by using AWS Glue Job Bookmarking, AWS Glue Crawlers, and AWS Glue Schema Registry. References:
* AWS Glue
* AWS Glue Data Catalog
* AWS Glue Workflows
* [AWS Glue Job Bookmarking]
* [AWS Glue Crawlers]
* [AWS Glue Schema Registry]
* [AWS Certified Data Engineer - Associate DEA-C01 Complete Study Guide]
NEW QUESTION # 96
A company uses Amazon S3 to store data and Amazon QuickSight to create visualizations.
The company has an S3 bucket in an AWS account named Hub-Account. The S3 bucket is encrypted with an AWS Key Management Service (AWS KMS) key. The company's Amazon QuickSight instance is in a separate AWS account named BI-Account.
The company updates the S3 bucket policy to grant access to the QuickSight service role. The company wants to enable cross-account access to allow QuickSight to interact with the S3 bucket.
Which combination of steps will meet this requirement? (Select TWO)
Answer: A,C
Explanation:
For Amazon QuickSight to access data in an Amazon S3 bucket that is encrypted with an AWS KMS key in a different AWS account, two distinct permissions are required: access to the S3 bucket and access to the KMS key.
First, the QuickSight service role in the BI-Account must be granted permission to access the S3 bucket. This is accomplished by adding the S3 bucket as a resource that the QuickSight service role can access and configuring the bucket policy in the Hub-Account to trust that role. Without explicit S3 permissions, QuickSight cannot read the objects.
Second, because the S3 bucket uses SSE-KMS encryption, QuickSight must also be authorized to use the KMS key. This requires adding an IAM policy to the QuickSight service role that allows kms:Decrypt and related permissions on the KMS key. Without KMS permissions, S3 access will fail even if the bucket policy allows access.
AWS RAM cannot be used to share S3 buckets, encryption of network connections is irrelevant to KMS permissions, and adding the KMS key as a "resource" alone is not sufficient without IAM permissions.
Therefore, Options B and D are correct.
NEW QUESTION # 97
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