AWS-Certified-Developer-Associate Free Practice Test

- (Exam Topic 3)
An application development team decides to use AWS X Ray to monitor application code to analyze performance and perform r cause analysis
What does the team need to do to begin using X Ray? (Select TWO )

1. A. Log instrumentation output into an Amazon SQS queue
2. B. Use a visualization tool to view application traces
3. C. Instrument application code using the AWS SDK
4. D. Install the X-Ray agent on the application servers
5. E. Create an Amazon DynamoDB table to store the trace logs

Correct Answer: DE

- (Exam Topic 2)
A Developer is creating a template that uses AWS CloudFormation to deploy an application. This application is serverless and uses Amazon API Gateway, Amazon DynamoDB, and AWS Lambda.
Which tool should the Developer use to define simplified syntax for expressing serverless resources?

1. A. CloudFormation serverless intrinsic functions
2. B. AWS serverless express
3. C. An AWS serverless application model
4. D. A CloudFormation serverless plugin

Correct Answer: A

- (Exam Topic 2)
A website’s page load times are gradually increasing as more users access the system at the same time. Analysis indicates that a user profile is being loaded from a database in all the web pages being visited by each user and this is increasing the database load and the page load latency. To address this issue the Developer decides to cache the user profile data.
Which caching strategy will address this situation MOST efficiently?

1. A. Create a new Amazon EC2 Instance and run a NoSQL database on i
2. B. Cache the profile data within this database using the write-through caching strategy.
3. C. Create an Amazon ElastiCache cluster to cache the user profile dat
4. D. Use a cache-aside caching strategy.
5. E. Use a dedicated Amazon RDS instance for caching profile dat
6. F. Use a write-through caching strategy.
7. G. Create an ElastiCache cluster to cache the user profile dat
8. H. Use a write-through caching strategy.

Correct Answer: B
https://docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/Strategies.html

- (Exam Topic 4)
A developer has an application that is composed of many different AWS Lambda functions. The Lambda functions all use some of the same dependencies. To avoid security issues, the developer is constantly updating the dependencies of all of the Lambda functions. The result is duplicated effort for each function.
Now can the developer keep the dependencies of the Lambda functions up to date with the LEAST additional complexity?

1. A. Define a maintenance window for the Lambda functions to ensure that the functions get updated copies of the dependencies.
2. B. Upgrade the Lambda functions to the most recent runtime version.
3. C. Define a Lambda layer that contains all of the shared dependencies.
4. D. Use an AWS CodeCommit repository to host the dependencies in a centralized location.

Correct Answer: C

- (Exam Topic 2)
A Developer wants to debug an application by searching and filtering log data. The application logs are stored in Amazon CloudWatch Logs. The Developer creates a new metric filter to count exceptions in the application logs. However, no results are returned from the logs.
What is the reason that no filtered results are being returned?

1. A. A setup of the Amazon CloudWatch interface VPC endpoint is required for filtering the CloudWatch Logs in the VPC
2. B. CloudWatch Logs only publishes metric data for events that happen after the filter is created
3. C. The log group for CloudWatch Logs should be first streamed to Amazon Elasticsearch Service before metric filtering returns the results
4. D. Metric data points for logs groups can be filtered only after they are exported to an Amazon S3 bucket

Correct Answer: B
https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/MonitoringLogData.html