Amazon AWS
AWS Certified Data Engineer – Associate
DEA-C01
The AWS Certified Data Engineer – Associate (DEA-C01) exam validates your skills in data engineering on AWS. It is suitable for those who want to demonstrate their ability to design and implement data solutions.
Questions 381–390 of 498
What happens when you increase the number of read replicas in Amazon RDS?
A
Write performance improves
B
Read performance improves
C
Data redundancy increases
D
Cost decreases
Increasing read replicas improves read performance, not write performance or cost.
Which service can automate data pipeline workflows?
A
AWS Data Pipeline
B
Amazon S3
C
AWS Lambda
D
Amazon RDS
AWS Data Pipeline orchestrates data workflows, while others focus on storage or compute.
A company needs to analyze real-time streaming data from IoT devices. Which AWS service should they use?
A
Amazon Athena
B
Amazon Kinesis
C
AWS Glue
D
Amazon Redshift
Amazon Kinesis is specifically designed for real-time data streaming, unlike the others which serve other data needs.
What happens when you delete an Amazon S3 bucket that is not empty?
A
Bucket deletes with all contents
B
Deletion fails until it's empty
C
Bucket deletes after timeout
D
Contents are archived automatically
Deletion of a non-empty bucket fails to protect data integrity; it must be empty to delete.
Which AWS service is used for real-time analytics on streaming data?
A
Amazon Kinesis
B
AWS Glue
C
Amazon Redshift
D
AWS Batch
Amazon Kinesis is designed for real-time data analysis, while others are for batch processing or data warehousing.
A company needs to automatically scale its EC2 instances based on demand. What should they implement?
A
AWS Lambda
B
EC2 Auto Scaling
C
AWS CloudFormation
D
Amazon CloudWatch
EC2 Auto Scaling adjusts the number of instances based on demand, unlike the others which do not specifically manage instance count.
What happens when you create a new IAM policy with the 'Deny' effect?
A
Access is granted to resources.
B
Access is denied to specified actions.
C
It overrides all existing policies.
D
Policies must have 'Allow' effects.
Deny effects revoke access explicitly; other options misrepresent IAM policy behavior.
Which service enables streaming data and analytics in real-time?
A
Amazon Kinesis
B
Amazon RDS
C
AWS Lambda
D
Amazon DynamoDB
Amazon Kinesis is designed for real-time data streaming; the others are not primarily for real-time analytics.
A company needs to analyze unstructured data stored in S3 without migrating it to a database. Which service should they use?
A
Amazon Redshift
B
Amazon QuickSight
C
Amazon Athena
D
Amazon EMR
Amazon Athena allows querying S3 data directly with SQL, while the others require data to be in a specific format or storage system.
You are configuring cross-account access in IAM. What must you provide in the trust policy?
A
Specific IAM user permissions
B
Resource ARN of the bucket
C
STS AssumeRole permission
D
Policy ARN of allowed services
The trust policy must allow STS AssumeRole for access; the others are unrelated to trust relationships.