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Amazon AWS Certified Data Engineer - Associate (DEA-C01) Sample Questions (Q11-Q16):

NEW QUESTION # 11
A company stores server logs in an Amazon 53 bucket. The company needs to keep the logs for 1 year. The logs are not required after 1 year.
A data engineer needs a solution to automatically delete logs that are older than 1 year.
Which solution will meet these requirements with the LEAST operational overhead?

A. Define an S3 Lifecycle configuration to delete the logs after 1 year.
B. Schedule a cron job on an Amazon EC2 instance to delete the logs after 1 year.
C. Configure an AWS Step Functions state machine to delete the logs after 1 year.
D. Create an AWS Lambda function to delete the logs after 1 year.

Answer: D

Explanation:
* Problem Analysis:
* The company usesAWS Gluefor ETL pipelines and requires automaticdata quality checks during pipeline execution.
* The solution must integrate with existing AWS Glue pipelines and evaluatedata quality rules based on predefined thresholds.
* Key Considerations:
* Ensure minimal implementation effort by leveraging built-in AWS Glue features.
* Use a standardized approach for defining and evaluating data quality rules.
* Avoid custom libraries or external frameworks unless absolutely necessary.
* Solution Analysis:
* Option A: SQL Transform
* Adding SQL transforms to define and evaluate data quality rules is possible but requires writing complex queries for each rule.
* Increases operational overhead and deviates from Glue's declarative approach.
* Option B: Evaluate Data Quality Transform with DQDL
* AWS Glue provides a built-inEvaluate Data Quality transform.
* Allows defining rules inData Quality Definition Language (DQDL), a concise and declarative way to define quality checks.
* Fully integrated with Glue Studio, making it the least effort solution.
* Option C: Custom Transform with PyDeequ
* PyDeequ is a powerful library for data quality checks but requires custom code and integration.
* Increases implementation effort compared to Glue's native capabilities.
* Option D: Custom Transform with Great Expectations
* Great Expectations is another powerful library for data quality but adds complexity and external dependencies.
* Final Recommendation:
* UseEvaluate Data Quality transformin AWS Glue.
* Define rules inDQDLfor checking thresholds, null values, or other quality criteria.
* This approach minimizes development effort and ensures seamless integration with AWS Glue.
:
AWS Glue Data Quality Overview
DQDL Syntax and Examples
Glue Studio Transformations

NEW QUESTION # 12
A company stores petabytes of data in thousands of Amazon S3 buckets in the S3 Standard storage class. The data supports analytics workloads that have unpredictable and variable data access patterns.
The company does not access some data for months. However, the company must be able to retrieve all data within milliseconds. The company needs to optimize S3 storage costs.
Which solution will meet these requirements with the LEAST operational overhead?

A. Use S3 Storage Lens activity metrics to identify S3 buckets that the company accesses infrequently.
Configure S3 Lifecycle rules to move objects from S3 Standard to the S3 Standard-Infrequent Access (S3 Standard-IA) and S3 Glacier storage classes based on the age of the data.
B. Use S3 Intelligent-Tiering. Activate the Deep Archive Access tier.
C. Use S3 Intelligent-Tiering. Use the default access tier.
D. Use S3 Storage Lens standard metrics to determine when to move objects to more cost-optimized storage classes. Create S3 Lifecycle policies for the S3 buckets to move objects to cost-optimized storage classes. Continue to refine the S3 Lifecycle policies in the future to optimize storage costs.

Answer: C

Explanation:
S3 Intelligent-Tiering is a storage class that automatically moves objects between four access tiers based on the changing access patterns. The default access tier consists of two tiers: Frequent Access and Infrequent Access. Objects in the Frequent Access tier have the same performance and availability as S3 Standard, while objects in the Infrequent Access tier have the same performance and availability as S3 Standard-IA. S3 Intelligent-Tiering monitors the access patterns of each object and moves them between the tiers accordingly, without any operational overhead or retrieval fees. This solution can optimize S3 storage costs for data with unpredictable and variable access patterns, while ensuring millisecond latency for data retrieval. The other solutions are not optimal or relevant for this requirement. Using S3 Storage Lens standard metrics and activity metrics can provide insights into the storage usage and access patterns, but they do not automate the data movement between storage classes. Creating S3 Lifecycle policies for the S3 buckets can move objects to more cost-optimized storage classes, but they require manual configuration and maintenance, and they may incur retrieval fees for data that is accessed unexpectedly. Activating the Deep Archive Access tier for S3 Intelligent-Tiering can further reduce the storage costs for data that is rarely accessed, but it also increases the retrieval time to 12 hours, which does not meet the requirement of millisecond latency. References:
S3 Intelligent-Tiering
S3 Storage Lens
S3 Lifecycle policies
[AWS Certified Data Engineer - Associate DEA-C01 Complete Study Guide]

NEW QUESTION # 13
A company stores server logs in an Amazon 53 bucket. The company needs to keep the logs for 1 year. The logs are not required after 1 year.
A data engineer needs a solution to automatically delete logs that are older than 1 year.
Which solution will meet these requirements with the LEAST operational overhead?

A. Define an S3 Lifecycle configuration to delete the logs after 1 year.
B. Schedule a cron job on an Amazon EC2 instance to delete the logs after 1 year.
C. Configure an AWS Step Functions state machine to delete the logs after 1 year.
D. Create an AWS Lambda function to delete the logs after 1 year.

Answer: D

Explanation:
Problem Analysis:
The company uses AWS Glue for ETL pipelines and requires automatic data quality checks during pipeline execution.
The solution must integrate with existing AWS Glue pipelines and evaluate data quality rules based on predefined thresholds.
Key Considerations:
Ensure minimal implementation effort by leveraging built-in AWS Glue features.
Use a standardized approach for defining and evaluating data quality rules.
Avoid custom libraries or external frameworks unless absolutely necessary.
Solution Analysis:
Option A: SQL Transform
Adding SQL transforms to define and evaluate data quality rules is possible but requires writing complex queries for each rule.
Increases operational overhead and deviates from Glue's declarative approach.
Option B: Evaluate Data Quality Transform with DQDL
AWS Glue provides a built-in Evaluate Data Quality transform.
Allows defining rules in Data Quality Definition Language (DQDL), a concise and declarative way to define quality checks.
Fully integrated with Glue Studio, making it the least effort solution.
Option C: Custom Transform with PyDeequ
PyDeequ is a powerful library for data quality checks but requires custom code and integration.
Increases implementation effort compared to Glue's native capabilities.
Option D: Custom Transform with Great Expectations
Great Expectations is another powerful library for data quality but adds complexity and external dependencies.
Final Recommendation:
Use Evaluate Data Quality transform in AWS Glue.
Define rules in DQDL for checking thresholds, null values, or other quality criteria.
This approach minimizes development effort and ensures seamless integration with AWS Glue.
Reference:
AWS Glue Data Quality Overview
DQDL Syntax and Examples
Glue Studio Transformations

NEW QUESTION # 14
A technology company currently uses Amazon Kinesis Data Streams to collect log data in real time. The company wants to use Amazon Redshift for downstream real-time queries and to enrich the log data.
Which solution will ingest data into Amazon Redshift with the LEAST operational overhead?

A. Use Amazon Redshift streaming ingestion from Kinesis Data Streams and to present data as a materialized view.
B. Set up an Amazon Data Firehose delivery stream to send data to a Redshift provisioned cluster table.
C. Set up an Amazon Data Firehose delivery stream to send data to Amazon S3. Configure a Redshift provisioned cluster to load data every minute.
D. Configure Amazon Managed Service for Apache Flink (previously known as Amazon Kinesis Data Analytics) to send data directly to a Redshift provisioned cluster table.

Answer: A

Explanation:
The most efficient and low-operational-overhead solution for ingesting data into Amazon Redshift from Amazon Kinesis Data Streams is to use Amazon Redshift streaming ingestion. This feature allows Redshift to directly ingest streaming data from Kinesis Data Streams and process it in real-time.
Amazon Redshift Streaming Ingestion:
Redshift supports native streaming ingestion from Kinesis Data Streams, allowing real-time data to be queried using materialized views.
This solution reduces operational complexity because you don't need intermediary services like Amazon Kinesis Data Firehose or S3 for batch loading.
Reference:
Alternatives Considered:
A (Data Firehose to Redshift): This option is more suitable for batch processing but incurs additional operational overhead with the Firehose setup.
B (Firehose to S3): This involves an intermediate step, which adds complexity and delays the real-time requirement.
C (Managed Service for Apache Flink): This would work but introduces unnecessary complexity compared to Redshift's native streaming ingestion.
Amazon Redshift Streaming Ingestion from Kinesis
Materialized Views in Redshift

NEW QUESTION # 15
A company ingests data from multiple data sources and stores the data in an Amazon S3 bucket. An AWS Glue extract, transform, and load (ETL) job transforms the data and writes the transformed data to an Amazon S3 based data lake. The company uses Amazon Athena to query the data that is in the data lake.
The company needs to identify matching records even when the records do not have a common unique identifier.
Which solution will meet this requirement?

A. Train and use the AWS Glue PySpark Filter class in the ETL job.
B. Train and use the AWS Lake Formation FindMatches transform in the ETL job.
C. Use Amazon Made pattern matching as part of the ETL job.
D. Partition tables and use the ETL job to partition the data on a unique identifier.

Answer: B

Explanation:
FindMatches is a transform available in AWS Lake Formation that uses ML to discover duplicate records or related records that might not have a common unique identifier.
It can be integrated into an AWS Glue ETL job to perform deduplication or matching tasks.
FindMatches is highly effective in scenarios where records do not share a key, such as customer records from different sources that need to be merged or reconciled.
Explanation:
The problem described requires identifying matching records even when there is no unique identifier. AWS Lake Formation FindMatches is designed for this purpose. It uses machine learning (ML) to deduplicate and find matching records in datasets that do not share a common identifier.
Reference:
Alternatives Considered:
A (Amazon Made pattern matching): Amazon Made is not a service in AWS, and pattern matching typically refers to regular expressions, which are not suitable for deduplication without a common identifier.
B (AWS Glue PySpark Filter class): PySpark's Filter class can help refine datasets, but it does not offer the ML-based matching capabilities required to find matches between records without unique identifiers.
C (Partition tables on a unique identifier): Partitioning requires a unique identifier, which the question states is unavailable.
AWS Glue Documentation on Lake Formation FindMatches
FindMatches in AWS Lake Formation

NEW QUESTION # 16
......

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Amazon Data-Engineer-Associate Actual Exam Questions Free Updates By Prep4pass

Exam Data-Engineer-Associate Assessment & Data-Engineer-Associate Exam Quiz

Amazon AWS Certified Data Engineer - Associate (DEA-C01) Sample Questions (Q11-Q16):

Free Download Visual Data-Engineer-Associate Cert Test – The Best Exam Assessment for your Amazon Data-Engineer-Associate

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