Amazon Web Service DVA-C02 Practice Questions

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Question 21

A media company uses Amazon Simple Queue Service (SQS) queue to manage their transactions. With changing business needs, the payload size of the messages is increasing. The Team Lead of the project is worried about the 256 KB message size limit that SQS has.

What can be done to make the queue accept messages of a larger size?

Get a service limit increase from AWS

Use gzip compression

Use the SQS Extended Client

Use the MultiPart API

Question 22

As a Senior Developer, you manage 10 Amazon EC2 instances that make read-heavy database requests to the Amazon RDS for PostgreSQL. You need to make this architecture resilient for disaster recovery.

Which of the following features will help you prepare for database disaster recovery? (Select two)

Select all that apply

Enable the automated backup feature of Amazon RDS in a multi-AZ deployment that creates backups in a single AWS Region

Use database cloning feature of the RDS DB cluster

Use RDS Provisioned IOPS (SSD) Storage in place of General Purpose (SSD) Storage

Use cross-Region Read Replicas

Enable the automated backup feature of Amazon RDS in a multi-AZ deployment that creates backups across multiple Regions

Question 23

As a developer, you are looking at creating a custom configuration for Amazon EC2 instances running in an Auto Scaling group. The solution should allow the group to auto-scale based on the metric of 'average RAM usage' for your Amazon EC2 instances.

Which option provides the best solution?

Create a custom metric in CloudWatch and make your instances send data to it using PutMetricData. Then, create an alarm based on this metric

Create a custom alarm for your ASG and make your instances trigger the alarm using PutAlarmData API

Migrate your application to AWS Lambda

Enable detailed monitoring for EC2 and ASG to get the RAM usage data and create a CloudWatch Alarm on top of it

Question 24

The development team at a social media company is considering using Amazon ElastiCache to boost the performance of their existing databases.

As a Developer Associate, which of the following use-cases would you recommend as the BEST fit for ElastiCache? (Select two)

Select all that apply

Use ElastiCache to improve performance of compute-intensive workloads

Use ElastiCache to run highly complex JOIN queries

Use ElastiCache to improve latency and throughput for read-heavy application workloads

Use ElastiCache to improve performance of Extract-Transform-Load (ETL) workloads

Use ElastiCache to improve latency and throughput for write-heavy application workloads

Question 25

As part of their on-boarding, the employees at an IT company need to upload their profile photos in a private S3 bucket. The company wants to build an in-house web application hosted on an EC2 instance that should display the profile photos in a secure way when the employees mark their attendance.

As a Developer Associate, which of the following solutions would you suggest to address this use-case?

Keep each user's profile image encoded in base64 format in a DynamoDB table and reference it from the application for display

Save the S3 key for each user's profile photo in a DynamoDB table and use a lambda function to dynamically generate a pre-signed URL. Reference this URL for display via the web application

Keep each user's profile image encoded in base64 format in an RDS table and reference it from the application for display

Make the S3 bucket public so that the application can reference the image URL for display

Question 26

A company has a workload that requires 14,000 consistent IOPS for data that must be durable and secure. The compliance standards of the company state that the data should be secure at every stage of its lifecycle on all of the EBS volumes they use.

Which of the following statements are true regarding data security on EBS?

EBS volumes support both in-flight encryption and encryption at rest using KMS

EBS volumes do not support in-flight encryption but do support encryption at rest using KMS

EBS volumes don't support any encryption

EBS volumes support in-flight encryption but does not support encryption at rest

Question 27

A financial services company wants to ensure that the customer data is always kept encrypted on Amazon S3 but wants a fully managed solution to create, rotate and remove the encryption keys.

As a Developer Associate, which of the following would you recommend to address the given use-case?

Server-Side Encryption with Secrets Manager

Server-Side Encryption with Customer Master Keys (CMKs) Stored in AWS Key Management Service (SSE-KMS)

Server-Side Encryption with Customer-Provided Keys (SSE-C)

Server-Side Encryption with Amazon S3-Managed Keys (SSE-S3)

Question 28

A team is checking the viability of using AWS Step Functions for creating a banking workflow for loan approvals. The web application will also have human approval as one of the steps in the workflow.

As a developer associate, which of the following would you identify as the key characteristics for AWS Step Function? (Select two)

Select all that apply

You should use Express Workflows for workloads with high event rates and short duration

Standard Workflows on AWS Step Functions are suitable for long-running, durable, and auditable workflows that do not support any human approval steps

Express Workflows have a maximum duration of five minutes and Standard workflows have a maximum duration of 180 days or 6 months

Standard Workflows on AWS Step Functions are suitable for long-running, durable, and auditable workflows that can also support any human approval steps

Both Standard and Express Workflows support all service integrations, activities, and design patterns

Question 29

You have migrated an on-premise SQL Server database to an Amazon Relational Database Service (RDS) database attached to a VPC inside a private subnet. Also, the related Java application, hosted on-premise, has been moved to an Amazon Lambda function.

Which of the following should you implement to connect AWS Lambda function to its RDS instance?

Configure Lambda to connect to VPC with private subnet and Security Group needed to access RDS

Configure lambda to connect to the public subnet that will give internet access and use Security Group to access RDS inside the private subnet

Use Environment variables to pass in the RDS connection string

Use Lambda layers to connect to the internet and RDS separately

Question 30

A company’s e-commerce website is expecting hundreds of thousands of visitors on Black Friday. The marketing department is concerned that high volumes of orders might stress SQS leading to message failures. The company has approached you for the steps to be taken as a precautionary measure against the high volumes.

What step will you suggest as a Developer Associate?

Pre-configure the SQS queue to increase the capacity when messages hit a certain threshold

Enable auto-scaling in the SQS queue

Amazon SQS is highly scalable and does not need any intervention to handle the expected high volumes

Convert the queue into FIFO ordered queue, since messages to the down system will be processed faster once they are ordered

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