Free DVA-C02 Which Command Should the Administrator Use Practice Questions Practice Questions | Courseiva

Scenario guide

How to approach which command should the administrator use practice questions

Practise command-choice questions where the task is to identify the correct verification, configuration or troubleshooting command.

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Which Command Should the Administrator Use Practice Questions questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Practice set

Practice scenarios

Question 1hardmultiple choice

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A developer is troubleshooting an AWS Lambda function that processes large CSV files (up to 1 GB) uploaded to an Amazon S3 bucket. The function uses Python and the pandas library to perform data transformations. Recently, the function started timing out on large files. CloudWatch Logs show that the function's execution time is close to the 15-minute Lambda timeout, and memory utilization peaks at around 80% of the configured 3,008 MB. The function has not been modified in months. Which action will most likely resolve the timeout issue without requiring code changes?

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Question 2hardmultiple choice

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A developer is troubleshooting an AWS Lambda function that experiences high latency for the first few invocations after being idle. The function is written in Python and uses a large library (e.g., Pandas). The function connects to an RDS database in a VPC. What is the most effective way to reduce the latency for the first invocation after idle?

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Question 3mediummultiple choice

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A developer is troubleshooting an AWS Lambda function that is triggered by an S3 event. The function occasionally fails with a timeout error. CloudWatch logs show that the timeout occurs during the processing of large files. The function has a memory setting of 128 MB and a timeout of 3 seconds. The developer wants to process large files without modifying the code. Which parameter should the developer adjust first?

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Question 4mediummultiple choice

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A developer notices that an AWS Lambda function, configured to access an Amazon RDS database in the same VPC, is timing out. The function has a 30-second timeout. CloudWatch Logs show that the function starts execution but never reaches the database. The VPC configuration includes private subnets without a NAT gateway. The RDS database is in the same VPC. What is the most likely cause of the timeout?

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Question 5hardmultiple choice

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A developer deployed an AWS Lambda function that is invoked by an Amazon SQS queue. The function is configured with a batch size of 10 and a timeout of 30 seconds. CloudWatch metrics show that the function's Duration is consistently around 28 seconds, but occasionally spikes to 35 seconds causing timeouts. The function makes a synchronous HTTP call to an external API. Which approach will MOST effectively prevent timeouts while maximizing throughput?

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Question 6mediummultiple choice

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A company uses AWS Elastic Beanstalk to run a web application. They want to deploy a new version with zero downtime and roll forward if successful. They have two environments: a production environment (current version) and a staging environment (new version). After verifying the staging environment, they want to swap the URLs so that production now points to the new version. Which deployment strategy should they use?

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Question 7easymultiple choice

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A developer is troubleshooting an AWS Lambda function that processes files uploaded to an Amazon S3 bucket. The function sometimes times out when processing large files. CloudWatch Logs show that the function's execution time correlates with file size. The function is configured with 128 MB memory and a timeout of 30 seconds. Which action should the developer take to resolve the timeout for large files without refactoring the code?

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Question 8mediummultiple choice

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A developer is troubleshooting an AWS Lambda function that processes records from an Amazon Kinesis Data Stream. The function is configured with a batch size of 100 and a parallelization factor of 1. The developer notices that the function is processing records slowly, and the iterator age is increasing. CloudWatch Logs show that the function is not experiencing errors or throttling, but the execution time per invocation is close to the 5-minute timeout. The stream has 10 shards. What is the most cost-effective way to increase processing throughput?

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Question 9mediummultiple choice

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A developer is building a serverless application that processes user-submitted images. The images are uploaded to an S3 bucket, which triggers an AWS Lambda function that creates a thumbnail and stores it in another S3 bucket. The developer notices that sometimes the Lambda function is invoked multiple times for a single image upload. What should the developer configure to ensure idempotent processing?

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Question 10hardmultiple choice

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An application receives webhooks from a partner. The developer must verify that each request was signed by the partner and not modified in transit. What should the application validate?

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Question 11hardmultiple choice

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A developer is troubleshooting an AWS Lambda function that is invoked from an Amazon S3 bucket via event notifications. The function processes images and stores metadata in Amazon DynamoDB. The developer notices that some images are being processed multiple times, resulting in duplicate entries in DynamoDB. The S3 event notification is configured to send events to the Lambda function with the 's3:ObjectCreated:*' event type. The function uses the 'uuid' library to generate a unique ID for each image upon processing. What is the most likely cause of the duplicate processing?

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Question 12mediummultiple choice

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A developer is setting up a CI/CD pipeline using AWS CodePipeline to deploy an application to Amazon ECS. The pipeline has a source stage that pulls code from an AWS CodeCommit repository. The developer wants the pipeline to execute only when commits are pushed to the 'main' branch. How should the developer configure this?

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Question 13hardmultiple choice

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A developer is troubleshooting an Amazon API Gateway REST API that returns 504 Gateway Timeout errors for certain requests. The backend is a Lambda function that performs a resource-intensive operation that occasionally takes up to 30 seconds. API Gateway has a default integration timeout of 29 seconds. The developer cannot reduce the execution time. What should the developer do to resolve the timeout issue?

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Question 14mediummultiple choice

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A developer is troubleshooting an AWS Lambda function that processes records from an Amazon Kinesis Data Stream. The function is configured with a batch size of 100 and a parallelization factor of 1. The developer notices that the iterator age is increasing, indicating that the function is not keeping up with the stream. CloudWatch Logs show that the function is not experiencing errors or throttling, but the execution time per invocation is close to the 5-minute timeout. The stream has 10 shards. Which action will most likely increase processing throughput?

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Question 15mediummultiple choice

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A developer is using AWS CodeDeploy to deploy an application to an EC2 Auto Scaling group. The application must remain fully available; only one instance should be taken offline at a time. The developer wants to configure the deployment to update instances one by one, ensuring that the deployment fails fast if any instance fails to deploy. Which deployment configuration should the developer choose?

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DVA-C02 Which Command Should the Administrator Use Practice Questions

How to approach which command should the administrator use practice questions

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Practice scenarios

An application receives webhooks from a partner. The developer must verify that each request was signed by the partner and not modified in transit. What should the application validate?