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AWS SAA-C01 题库答案修正版(20200425).pdf
Exam A
QUESTION 1
A Solutions Architect is designing an application that will encrypt all data in an Amazon Redshift cluster.
Which action will encrypt the data at rest?
A. Place the Redshift cluster in a private subnet.
B. Use the AWS KMS Default Customer master key.
C. Encrypt the Amazon EBS volumes.
D. Encrypt the data using SSL/TLS.
QUESTION 2
A website experiences unpredictable traffic. During peak traffic times, the database is unable to keep up with
the write request.
Which AWS service will help decouple the web application from the database?
A. Amazon SQS
B. Amazon EFS
C. Amazon S3
D. AWS Lambda
QUESTION 3
A legacy application needs to interact with local storage using iSCSI. A team needs to design a reliable storage
solution to provision all new storage on AWS.
Which storage solution meets the legacy application requirements?
A. AWS Snowball storage for the legacy application until the application can be re-architected.
B. AWS Storage Gateway in cached mode for the legacy application storage to write data to Amazon S3.
C. AWS Storage Gateway in stored mode for the legacy application storage to write data to Amazon S3.
D. An Amazon S3 volume mounted on the legacy application server locally using the File Gateway service.
QUESTION 4
A Solutions Architect is designing an architecture for a mobile gaming application. The application is expected
to be very popular. The Architect needs to prevent the Amazon RDS MySQL database from becoming a
bottleneck due to frequently accessed queries.
Which service or feature should the Architect add to prevent a bottleneck?
A. Multi-AZ feature on the RDS MySQL Database
B. ELB Classic Load Balancer in front of the web application tier
C. Amazon SQS in front of RDS MySQL Database
D. Amazon ElastiCache in front of the RDS MySQL Database
QUESTION 5
A company is launching an application that it expects to be very popular. The company needs a database that
can scale with the rest of the application. The schema will change frequently. The application cannot afford any
downtime for database changes.
Which AWS service allows the company to achieve these objectives?
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A. Amazon Redshift
B. Amazon DynamoDB
C. Amazon RDS MySQL
D. Amazon Aurora
QUESTION 6
A Solutions Architect is designing a disaster recovery solution for a 5 TB Amazon Redshift cluster. The
recovery site must be at least 500 miles (805 kilometers) from the live site.
How should the Architect meet these requirements?
A. Use AWS CloudFormation to deploy the cluster in a second region.
B. Take a snapshot of the cluster and copy it to another Availability Zone.
C. Modify the Redshift cluster to span two regions.
D. Enable cross-region snapshots to a different region.
QUESTION 7
A customer has written an application that uses Amazon S3 exclusively as a data store. The application works
well until the customer increases the rate at which the application is updating information. The customer now
reports that outdated data occasionally appears when the application accesses objects in Amazon S3.
What could be the problem, given that the application logic is otherwise correct?
A. The application is reading parts of objects from Amazon S3 using a range header.
B. The application is reading objects from Amazon S3 using parallel object requests.
C. The application is updating records by writing new objects with unique keys.
D. The application is updating records by overwriting existing objects with the same keys.
QUESTION 8
A Solutions Architect is designing a new social media application. The application must provide a secure
method for uploading profile photos. Each user should be able to upload a profile photo into a shared storage
location for one week after their profile is created.
Which approach will meet all of these requirements?
A. Use Amazon Kinesis with AWS CloudTrail for auditing the specific times when profile photos are uploaded.
B. Use Amazon EBS volumes with IAM policies restricting user access to specific time periods.
C. Use Amazon S3 with the default private access policy and generate pre-signed URLs each time a new site
profile is created.
D. Use Amazon CloudFront with AWS CloudTrail for auditing the specific times when profile photos are
uploaded.
QUESTION 9
An application requires block storage for file updates. The data is 500 GB and must continuously sustain 100
MiB/s of aggregate read/write operations.
Which storage option is appropriate for this application?
A. Amazon S3
B. Amazon EFS
C. Amazon EBS
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D. Amazon Glacier
QUESTION 10
A mobile application serves scientific articles from individual files in an Amazon S3 bucket. Articles older than
30 days are rarely read. Articles older than 60 days no longer need to be available through the application, but
the application owner would like to keep them for historical purposes.
Which cost-effective solution BEST meets these requirements?
A. Create a Lambda function to move files older than 30 days to Amazon EBS and move files older than 60
days to Amazon Glacier.
B. Create a Lambda function to move files older than 30 days to Amazon Glacier and move files older than 60
days to Amazon EBS.
C. Create lifecycle rules to move files older than 30 days to Amazon S3 Standard Infrequent Access and move
files older than 60 days to Amazon Glacier.
D. Create lifecycle rules to move files older than 30 days to Amazon Glacier and move files older than 60 days
to Amazon S3 Standard Infrequent Access.
QUESTION 11
An organization is currently hosting a large amount of frequently accessed data consisting of key-value pairs
and semi-structured documents in their data center. They are planning to move this data to AWS.
Which of one of the following services MOST effectively meets their needs?
A. Amazon Redshift
B. Amazon RDS
C. Amazon DynamoDB
D. Amazon Aurora
QUESTION 12
A Lambda function must execute a query against an Amazon RDS database in a private subnet.
Which steps are required to allow the Lambda function to access the Amazon RDS database? (Choose two.)
A. Create a VPC Endpoint for Amazon RDS.
B. Create the Lambda function within the Amazon RDS VPC.
C. Change the ingress rules of Lambda security group, allowing the Amazon RDS security group.
D. Change the ingress rules of the Amazon RDS security group, allowing the Lambda security group.
E. Add an Internet Gateway (IGW) to the VPC, route the private subnet to the IGW.
QUESTION 13
A Solutions Architect needs to build a resilient data warehouse using Amazon Redshift. The Architect needs to
rebuild the Redshift cluster in another region.
Which approach can the Architect take to address this requirement?
A. Modify the Redshift cluster and configure cross-region snapshots to the other region.
B. Modify the Redshift cluster to take snapshots of the Amazon EBS volumes each day, sharing those
snapshots with the other region.
C. Modify the Redshift cluster and configure the backup and specify the Amazon S3 bucket in the other region.
D. Modify the Redshift cluster to use AWS Snowball in export mode with data delivered to the other region.
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QUESTION 14
A popular e-commerce application runs on AWS. The application encounters performance issues. The
database is unable to handle the amount of queries and load during peak times. The database is running on
the RDS Aurora engine on the largest instance size available.
What should an administrator do to improve performance?
A. Convert the database to Amazon Redshift.
B. Create a CloudFront distribution.
C. Convert the database to use EBS Provisioned IOPS.
D. Create one or more read replicas.
QUESTION 15
A Solutions Architect is designing the architecture for a new three-tier web-based e-commerce site that must
be available 24/7. Requests are expected to range from 100 to 10,000 each minute. Usage can vary depending
on time of day, holidays, and promotions. The design should be able to handle these volumes, with the ability
to handle higher volumes if necessary.
How should the Architect design the architecture to ensure the web tier is cost-optimized and can handle the
expected traffic? (Choose two.)
A. Launch Amazon EC2 instances in an Auto Scaling group behind an ELB.
B. Store all static files in a multi-AZ Amazon Aurora database.
C. Create an CloudFront distribution pointing to static content in Amazon S3.
D. Use Amazon Route 53 to route traffic to the correct region.
E. Use Amazon S3 multi-part uploads to improve upload times.
QUESTION 16
A Solutions Architect is designing a three-tier web application. The Architect wants to restrict access to the
database tier to accept traffic from the application servers only. However, these application servers are in an
Auto Scaling group and may vary in quantity.
How should the Architect configure the database servers to meet the requirements?
A. Configure the database security group to allow database traffic from the application server IP addresses.
B. Configure the database security group to allow database traffic from the application server security group.
C. Configure the database subnet network ACL to deny all inbound non-database traffic from the application-
tier subnet.
D. Configure the database subnet network ACL to allow inbound database traffic from the application-tier
subnet.
QUESTION 17
An Internet-facing multi-tier web application must be highly available. An ELB Classic Load Balancer is
deployed in front of the web tier. Amazon EC2 instances at the web application tier are deployed evenly across
two Availability Zones. The database is deployed using RDS Multi-AZ. A NAT instance is launched for Amazon
EC2 instances and database resources to access the Internet. These instances are not assigned with public IP
addresses.
Which component poses a potential single point of failure in this architecture?
A. Amazon EC2
B. NAT instance
C. ELB Classic Load Balancer
D. Amazon RDS
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QUESTION 18
A call center application consists of a three-tier application using Auto Scaling groups to automatically scale
resources as needed. Users report that every morning at 9:00 AM the system becomes very slow for about 15
minutes. A Solutions Architect determines that a large percentage of the call center staff starts work at 9:00
AM, so Auto Scaling does not have enough time to scale out to meet demand.
How can the Architect fix the problem?
A. Change the Auto Scaling group’s scale out event to scale based on network utilization.
B. Create an Auto Scaling scheduled action to scale out the necessary resources at 8:30 AM every morning.
C. Use Reserved Instances to ensure the system has reserved the right amount of capacity for the scale-up
events.
D. Permanently keep a steady state of instances that is needed at 9:00 AM to guarantee available resources,
but leverage Spot Instances.
QUESTION 19
An e-commerce application is hosted in AWS. The last time a new product was launched, the application
experienced a performance issue due to an enormous spike in traffic. Management decided that capacity must
be doubled the week of future product launches.
Which is the MOST efficient way for management to ensure that capacity requirements are met?
A. Add a Step Scaling policy.
B. Add a Dynamic Scaling policy.
C. Add a Scheduled Scaling action.
D. Add Amazon EC2 Spot Instances.
QUESTION 20
A customer owns a simple API for their website that receives about 1,000 requests each day and has an
average response time of 50 ms. It is currently hosted on one c4.large instance.
Which changes to the architecture will provide high availability at the LOWEST cost?
A. Create an Auto Scaling group with a minimum of one instance and a maximum of two instances, then use
an Application Load Balancer to balance the traffic.
B. Recreate the API using Amazon API Gateway and use AWS Lambda as the service backend.
C. Create an Auto Scaling group with a maximum of two instances, then use an Application Load Balancer to
balance the traffic.
D. Recreate the API using Amazon API Gateway and integrate the new API with the existing backend service.
QUESTION 21
A Solutions Architect is designing an application that uses Amazon EBS volumes. The volumes must be
backed up to a different region.
How should the Architect meet this requirement?
A. Create EBS snapshots directly from one region to another.
B. Move the data to an Amazon S3 bucket and enable cross-region replication.
C. Create EBS snapshots and then copy them to the desired region.
D. Use a script to copy data from the current Amazon EBS volume to the destination Amazon EBS volume.
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QUESTION 22
A company is using an Amazon S3 bucket located in us-west-2 to serve videos to their customers. Their
customers are located all around the world and the videos are requested a lot during peak hours. Customers in
Europe complain about experiencing slow downloaded speeds, and during peak hours, customers in all
locations report experiencing HTTP 500 errors.
What can a Solutions Architect do to address these issues?
A. Place an elastic load balancer in front of the Amazon S3 bucket to distribute the load during peak hours.
B. Cache the web content with Amazon CloudFront and use all Edge locations for content delivery.
C. Replicate the bucket in eu-west-1 and use an Amazon Route 53 failover routing policy to determine which
bucket it should serve the request to.
D. Use an Amazon Route 53 weighted routing policy for the CloudFront domain name to distribute the GET
request between CloudFront and the Amazon S3 bucket directly.
QUESTION 23
A Solutions Architect is designing a solution that includes a managed VPN connection.
To monitor whether the VPN connection is up or down, the Architect should use:
A. an external service to ping the VPN endpoint from outside the VPC.
B. AWS CloudTrail to monitor the endpoint.
C.
D. an AWS Lambda function that parses the VPN connection logs.
the CloudWatch TunnelState Metric.
QUESTION 24
A social networking portal experiences latency and throughput issues due to an increased number of users.
Application servers use very large datasets from an Amazon RDS database, which creates a performance
bottleneck on the database.
Which AWS service should be used to improve performance?
A. Auto Scaling
B. Amazon SQS
C. Amazon ElastiCache
D. ELB Application Load Balancer
QUESTION 25
A Solutions Architect is designing network architecture for an application that has compliance requirements.
The application will be hosted on Amazon EC2 instances in a private subnet and will be using Amazon S3 for
storing data. The compliance requirements mandate that the data cannot traverse the public Internet.
What is the MOST secure way to satisfy this requirement?
A. Use a NAT Instance.
B. Use a NAT Gateway.
C. Use a VPC endpoint.
D. Use a Virtual Private Gateway.
QUESTION 26
Developers are creating a new online transaction processing (OLTP) application for a small database that is
very read-write intensive. A single table in the database is updated continuously throughout the day, and the
developers want to ensure that the database performance is consistent.
Which Amazon EBS storage option will achieve the MOST consistent performance to help maintain application
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performance?
A. Provisioned IOPS SSD
B. General Purpose SSD
C. Cold HDD
D. Throughput Optimized HDD
QUESTION 27
A Solutions Architect is designing a log-processing solution that requires storage that supports up to 500 MB/s
throughput. The data is sequentially accessed by an Amazon EC2 instance.
Which Amazon storage type satisfies these requirements?
A. EBS Provisioned IOPS SSD (io1)
B. EBS General Purpose SSD (gp2)
C. EBS Throughput Optimized HDD (st1)
D. EBS Cold HDD (sc1)
QUESTION 28
A company’s development team plans to create an Amazon S3 bucket that contains millions of images. The
team wants to maximize the read performance of Amazon S3.
Which naming scheme should the company use?
A. Add a date as the prefix.
B. Add a sequential id as the suffix.
C. Add a hexadecimal hash as the suffix.
D. Add a hexadecimal hash as the prefix.
QUESTION 29
A Solutions Architect needs to design a solution that will enable a security team to detect, review, and perform
root cause analysis of security incidents that occur in a cloud environment. The Architect must provide a
centralized view of all API events for current and future AWS regions.
How should the Architect accomplish this task?
A. Enable AWS CloudTrail logging in each individual region. Repeat this for all future regions.
B. Enable Amazon CloudWatch logs for all AWS services across all regions and aggregate them in a single
Amazon S3 bucket.
C. Enable AWS Trusted Advisor security checks and report all security incidents for all regions.
D. Enable AWS CloudTrail by creating a new trail and apply the trail to all regions.
QUESTION 30
A company has a legacy application using a proprietary file system and plans to migrate the application to
AWS.
Which storage service should the company use?
A. Amazon DynamoDB
B. Amazon S3
C. Amazon EBS
D. Amazon EFS
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QUESTION 31
A company plans to use AWS for all new batch processing workloads. The company’s developers use Docker
containers for the new batch processing. The system design must accommodate critical and non-critical batch
processing workloads 24/7.
How should a Solutions Architect design this architecture in a cost-efficient manner?
A. Purchase Reserved Instances to run all containers. Use Auto Scaling groups to schedule jobs.
B. Host a container management service on Spot Instances. Use Reserved Instances to run Docker
containers.
C. Use Amazon ECS orchestration and Auto Scaling groups: one with Reserve Instances, one with Spot
Instances.
D. Use Amazon ECS to manage container orchestration. Purchase Reserved Instances to run all batch
workloads at the same time.
QUESTION 32
A company is evaluating Amazon S3 as a data storage solution for their daily analyst reports. The company
has implemented stringent requirements concerning the security of the data at rest. Specifically, the CISO
asked for the use of envelope encryption with separate permissions for the use of an envelope key, automated
rotation of the encryption keys, and visibility into when an encryption key was used and by whom.
Which steps should a Solutions Architect take to satisfy the security requirements requested by the CISO?
A. Create an Amazon S3 bucket to store the reports and use Server-Side Encryption with Customer-Provided
Keys (SSE-C).
B. Create an Amazon S3 bucket to store the reports and use Server-Side Encryption with Amazon S3-
Managed Keys (SSE-S3).
C. Create an Amazon S3 bucket to store the reports and use Server-Side Encryption with AWS KMS-
Managed Keys (SSE-KMS).
D. Create an Amazon S3 bucket to store the reports and use Amazon S3 versioning with Server-Side
Encryption with Amazon S3-Managed Keys (SSE-S3).
QUESTION 33
A customer has a production application that frequently overwrites and deletes data, the application requires
the most up-to-date version of the data every time it is requested.
Which storage should a Solutions Architect recommend to bet accommodate this use case?
A. Amazon S3
B. Amazon RDS
C. Amazon RedShift
D. AWS Storage Gateway
QUESTION 34
A Solutions Architect is designing a photo application on AWS. Every time a user uploads a photo to Amazon
S3, the Architect must insert a new item to a DynamoDB table.
Which AWS-managed service is the BEST fit to insert the item?
A. Lambda@Edge
B. AWS Lambda
C. Amazon API Gateway
D. Amazon EC2 instances
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