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Amazon DVA-C01 Exam Syllabus Topics:
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AWS DVA-C01 Exam Certification Details:
| Number of Questions | 65 |
| Exam Price | $150 USD |
| Passing Score | 720 / 1000 |
| Exam Name | AWS Developer Associate (AWS-CDA) |
| Schedule Exam | AWS Certification |
| Exam Code | DVA-C01 |
| Recommended Training / Books | Developing on AWS |
| Sample Questions | AWS DVA-C01 Sample Questions |
| Duration | 130 minutes |
NEW QUESTION 183
A Developer is creating a web application that requires authentication, but also needs to support guest access to provide users limited access without having to authenticate. What service can provide support for the application to allow guest access?
- A. IAM with SAML integration
- B. Amazon Cognito with unauthenticated access enabled
- C. Amazon Directory Service
- D. IAM temporary credentials using AWS STS.
Answer: B
Explanation:
Explanation
https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-getting-started-hello
https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-cli-command-reference-sa
https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-cli-command-reference-sa
NEW QUESTION 184
How can software determine the public and private IP addresses of the Amazon EC2 instance that it is running on?
- A. Query the local instance userdata.
- B. Use ipconfig or ifconfig command.
- C. Query the local instance metadata.
- D. Query the appropriate Amazon CloudWatch metric.
Answer: C
Explanation:
Explanation
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-categories.html Data: local-hostname Descriptions: The private IPv4 DNS hostname of the instance. In cases where multiple network interfaces are present, this refers to the eth0 device (the device for which the device number is 0).
Data: public-ipv4 Descriptions: The public IPv4 address. If an Elastic IP address is associated with the instance, the value returned is the Elastic IP address.
NEW QUESTION 185
A Developer is building a three-tier web application that should be able to handle a minimum of 5000 requests per minute. Requirements state that the web tier should be completely stateless while the application maintains session state for the users.
How can session data be externalized, keeping latency at the LOWEST possible value?
- A. Create an Amazon ElastiCache Memcached cluster, then implement session handling at the application level to leverage the cluster for session data storage
- B. Implement a shared file system solution across the underlying Amazon EC2 instances, then implement session handling at the application level to leverage the shared file system for session data storage
- C. Create an Amazon RDS instance, then implement session handling at the application level to leverage a database inside the RDS database instance for session data storage
- D. Create an Amazon DynamoDB table, then implement session handling at the application level to leverage the table for session data storage
Answer: A
Explanation:
https://aws.amazon.com/caching/session-management/
NEW QUESTION 186
An application runs on multiple EC2 instances behind an ELB.
Where is the session data best written so that it can be served reliably across multiple requests?
- A. Write data to Amazon Elastic Block Store.
- B. Write data to the root filesystem.
- C. Write data to Amazon EC2 Instance Store.
- D. Write data to Amazon ElastiCache
Answer: D
NEW QUESTION 187
When uploading an object, what request header can be explicitly specified in a request to Amazon S3 to encrypt object data when saved on the server side?
- A. x-amz-storage-class
- B. x-amz-server-side-encryption
- C. x-amz-security-token
- D. Content-MD5
Answer: B
Explanation:
Explanation
https://docs.aws.amazon.com/AmazonS3/latest/dev/UsingServerSideEncryption.html#APISupportforServer-Side
NEW QUESTION 188
An advertising company has a dynamic website with heavy traffic. The company wants to migrate the website infrastructure to AWS to handle everything except website development.
Which solution BEST meets these requirements?
- A. Use Amazon S3 to host the website. Use Amazon CloudFornt to deliver the content at scale.
- B. Use AWS VM Import to migrate a web server image to AWS Launch the image on a compute-optimized Amazon EC2 instanceLaunch.
- C. Launch multiple Amazon Lighsall instance behind a load balancer. Set up the website on those instances.
- D. Deploy the website code in an AWS Elastic Beanstalk environment. Use Auto Scaling to scale the numbers of instance
Answer: D
NEW QUESTION 189
A Developer is writing an application that runs on Amazon EC2 instances in an Auto scaling group. The application data is stored in an Amazon DynamoDB table and records are constantly updated by all instances. An instance sometimes retrieves old data. The Developer wants to correct this by making sure the reads are strongly consistent.
How can the developer accomplish this?
- A. Use the Getshardlterator command.
- B. Set consistentRead to true when calling Getitem.
- C. Create a new DynamoDB Accelerator (DAX) table.
- D. Set consistency to strong when calling Update Table.
Answer: B
NEW QUESTION 190
A company is building an application to track athlete performance using an Amazon DynamoDB table. Each item in the table is identified by a partition key (user_id) and a sort key (sport_name). The table design is shown below:
(Note: Not all table attributes are shown)
A Developer is asked to write a leaderboard application to display the top performers (user_id) based on the score for each sport_name.
What process will allow the Developer to extract results MOST efficiently from the DynamoDB table?
- A. Create a local secondary index with a primary key of sport_name and a sort key of score and get the results based on the score attribute.
- B. Use a DynamoDB scan operation to retrieve scores and user_id based on sport_name, and order the results based on the score attribute.
- C. Create a global secondary index with a partition key of sport_name and a sort key of score, and get the results
- D. Use a DynamoDB query operation with the key attributes of user_id and sport_name and order the results based on the score attribute.
Answer: C
Explanation:
Reference:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/SecondaryIndexes.html
https://docs.aws.amazon.com/zh_cn/amazondynamodb/latest/developerguide/GSI.html
NEW QUESTION 191
A Lambda function processes data before sending it to a downstream service Each piece of data is approximately 1 MB in size After a security audit, the function t]is now required to encrypt the data before sending it downstream Which API call is required to perform the encryption?
- A. Use the KMS GenerateDataKey API to get an encryption key
- B. Pass the data to KMS as part of the Encrypt API for encryption
- C. Use the KMS GenerateDataKeyWithoutPlain.Text API to get an encryption key
- D. Pass the data to the KMS ReEncrypi API for encryption
Answer: B
NEW QUESTION 192
A developer from AnyCompany's AWS account needs access to the Example Corp AWS account AnyCompany uses an identity provider that is compatible with OpenID Connect.
What is the MOST secure way for Example Corp to allow developer access?
- A. Create a user in the Example Corp account and provide the credentials
- B. Create a cross-account role and call the AssumeRoleWithWebldentity API operation
- C. Create a user in the Example Corp account and provide the access keys
- D. Create a cross-account role and call the AssumeRole API operation
Answer: C
NEW QUESTION 193
Given the following AWS CloudFormation template:
What is the MOST efficient way to reference the new Amazon S3 bucket from another AWS CloudFormation template?
- A. Create a custom AWS CloudFormation resource that gets the bucket name from the ContentBucket resource of the first stack.
- B. Add Exported: True to the ContentBucket in the original template and use ImportResource in other templates.
- C. Use Fn: : Include to include the existing template in other template and use the ContentBucket resource directly
- D. Add an Export declaration to the outputs section of the original template and use ImportValue in other templates.
Answer: C
NEW QUESTION 194
Company C has recently launched an online commerce site for bicycles on AWS. They have a "Product" DynamoDB table that stores details for each bicycle, such as, manufacturer, color, price, quantity and size to display in the online store. Due to customer demand, they want to include an image for each bicycle along with the existing details.
Which approach below provides the least impact to provisioned throughput on the "Product" table?
- A. Add an image data type to the "Product" table to store the images in binary format
- B. Create an "Images" DynamoDB table to store the Image with a foreign key constraint to the "Product" table
- C. Store the images in Amazon S3 and add an S3 URL pointer to the "Product" table item for each image
- D. Serialize the image and store it in multiple DynamoDB tables
Answer: C
Explanation:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/bp-use-s3-too.html#bp-use-s3-too-large-values For example, consider the ProductCatalog table in the Creating Tables and Loading Data for Code Examples in DynamoDB section. Items in this table store information about item price, description, book authors, and dimensions for other products. If you wanted to store an image of each product that was too large to fit in an item, you could store the images in Amazon S3 instead of in DynamoDB.
NEW QUESTION 195
A Developer has been asked to make changes to the source code of an AWS Lambda function. The function is managed using an AWS CloudFormation template. The template is configured to load the source code from an Amazon S3 bucket. The Developer manually created a .ZIP file deployment package containing the changes and put the file into the correct location on Amazon S3. When the function is invoked, the code changes have not been applied.
What step is required to update the function with the changes?
- A. Ensure that the function source code is base64-encoded before uploading the deployment package to S3.
- B. Delete the .ZIP file on S3, and re-upload by using a different object key name.
- C. Update the CloudFormation stack with the correct values for the function code properties S3Bucket, S3Key, or S3ObjectVersion.
- D. Modify the execution role of the Lambda function to allow S3 access permission to the deployment package .ZIP file.
Answer: C
Explanation:
Explanation
Changes to a deployment package in Amazon S3 are not detected automatically during stack updates. To update the function code, change the object key or version in the template.
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-lambda-function-code.html
NEW QUESTION 196
What item operation allows the retrieval of multiple items from a DynamoDB table in a single API call?
- A. GetItemRange
- B. GetItem
- C. GetMultipleItems
- D. BatchGetItem
Answer: D
NEW QUESTION 197
Which features can be used to restrict access to data in S3? Choose 2 answers
- A. Use S3 Virtual Hosting
- B. Enable IAM Identity Federation.
- C. Create a CloudFront distribution for the bucket
- D. Set an S3 ACL on the bucket or the object.
- E. Set an S3 Bucket policy.
Answer: D,E
Explanation:
Explanation
https://aws.amazon.com/premiumsupport/knowledge-center/secure-s3-resources/
NEW QUESTION 198
A Developer is receiving HTTP 400: ThrottlingException errors intermittently when calling the Amazon CloudWatch API. When a call fails, no data is retrieved.
What best practice should first be applied to address this issue?
- A. Contact AWS Support for a limit increase.
- B. Analyze the applications and remove the API call
- C. Retry the call with exponential backoff
- D. Use the AWS CLI to get the metrics
Answer: A
Explanation:
Explanation
https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/cloudwatch_limits.html
NEW QUESTION 199
In AWS, which security aspects are the customer's responsibility? Choose 4 answers
- A. Controlling physical access to compute resources
- B. Encryption of EBS (Elastic Block Storage) volumes
- C. Patch management on the EC2 instance's operating system
- D. Security Group and ACL (Access Control List) settings
- E. Decommissioning storage devices
- F. Life-cycle management of IAM credentials
Answer: B,C,D,F
Explanation:
Explanation
Physical and Environmental Security
AWS's data centers are state of the art, utilizing innovative architectural and engineering approaches.
Amazon has many years of experience in designing, constructing, and operating large-scale data centers. This experience has been applied to the AWS platform and infrastructure. AWS data centers are housed in nondescript facilities. Physical access is strictly controlled both at the perimeter and at building ingress points by professional security staff utilizing video surveillance, intrusion detection systems, and other electronic means. Authorized staff must pass two-factor authentication a minimum of two times to access data center floors. All visitors and contractors are required to present identification and are signed in and continually escorted by authorized staff.
* When a storage device has reached the end of its useful life, AWS procedures include a decommissioning process that is designed to prevent customer data from being exposed to unauthorized individuals.
* AWS uses the techniques detailed in DoD 5220.22-M (National Industrial Security Program Operating Manual) or NIST 800-88 (Guidelines for Media Sanitization) to destroy data as part of the decommissioning process.
* All decommissioned magnetic storage devices are degaussed and physically destroyed in accordance with industry-standard practices.
Storage Decommissioning
NEW QUESTION 200
An application runs on multiple EC2 instances behind an ELB.
Where is the session data best written so that it can be served reliably across multiple requests?
- A. Write data to Amazon Elastic Block Store.
- B. Write data to the root filesystem.
- C. Write data to Amazon EC2 Instance Store.
- D. Write data to Amazon ElastiCache
Answer: C
NEW QUESTION 201
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DVA-C01 Dumps Updated Practice Test and 471 unique questions: https://www.lead2passed.com/Amazon/DVA-C01-practice-exam-dumps.html
Latest Amazon AWS Certified Associate DVA-C01 Actual Free Exam Questions: https://drive.google.com/open?id=1j61Nz3pBo3C7ijdMD0ivFyWCz4iqlzxk
