AWS Certified Alexa Skill Builder - Specialty
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Free AWS Certified Alexa Skill Builder - Specialty Questions
What is the purpose of the AudioPlayer directives?
- A. To adjust device volume
- B. To control long-form audio playback (play, stop, pause)
- C. To play short audio clips with SSML
- D. To enable audio input from users
Explanation
AudioPlayer directives (Play, Stop, ClearQueue) control long-form audio playback in skills using the AudioPlayer interface. These directives queue audio streams, control playback, and handle audio that exceeds the SSML audio tag's 240-second limit. Skills using AudioPlayer must handle AudioPlayer request types (PlaybackStarted, PlaybackFinished, etc.) to manage the playback lifecycle.
Correct Answer Is:
B
What is the purpose of slot validation in dialog management?
- A. To check if slot values are within acceptable ranges or match specific criteria
- B. To verify the user's identity
- C. To ensure slots are in the correct order
- D. To prevent SQL injection attacks
Explanation
Slot validation checks if collected slot values meet specific criteria defined in your dialog model. You can validate based on prompts that re-elicit invalid values. Validation rules help ensure data quality before intent fulfillment. For example, validating that a date is in the future or a quantity is positive. Validation reduces errors and improves user experience.
Correct Answer Is:
A
An Alexa skill needs to schedule a task to run in the future. What approach should be used?
- A. Lambda scheduled events via CloudWatch Events
- B. setTimeout in Node.js Lambda function
- C. DynamoDB TTL with Lambda triggers
- D. Either A or C depending on requirements
Explanation
Use CloudWatch Events for simple recurring schedules or Amazon DynamoDB TTL with Lambda triggers for item-specific scheduling. setTimeout is unreliable in Lambda due to function lifecycle. For user-specific reminders, use Alexa Reminders API. For complex scheduling, consider Amazon EventBridge or Step Functions. Choose the approach based on your specific scheduling requirements.
Correct Answer Is:
D
An Alexa skill builder needs to host MP3 audio files for use with the SSML audio tag. Which service provides the MOST scalable solution?
- A. AWS Lambda function storage
- B. Amazon S3 with appropriate permissions
- C. Amazon EC2 instance storage
- D. Amazon DynamoDB
Explanation
Amazon S3 is the most scalable and cost-effective solution for hosting audio files. S3 provides high availability, scalability, and low latency for static file delivery. Audio files used in Alexa skills must be hosted on HTTPS endpoints, properly formatted (MP3, specific bitrate/sample rate), and publicly accessible or accessible via pre-signed URLs. S3 meets all these requirements and scales automatically.
Correct Answer Is:
B
An Alexa skill needs to send proactive notifications to users. What must be configured?
- A. Amazon SNS topic integration
- B. Alexa Notifications API and proper permissions
- C. CloudWatch Events rules
- D. Alexa Push Notification Service
Explanation
To send proactive notifications, you must use the Alexa Notifications API and request appropriate permissions from users. Users must grant notification permission through the Alexa app. Your skill must also meet notification content guidelines and certification requirements. Notifications allow skills to notify users about important events even when they're not actively using the skill.
Correct Answer Is:
B
Which AWS service should be used to securely store API keys needed by an Alexa skill?
- A. Environment variables in Lambda
- B. AWS Systems Manager Parameter Store or AWS Secrets Manager
- C. DynamoDB table
- D. S3 bucket with encryption
Explanation
AWS Systems Manager Parameter Store or AWS Secrets Manager are the recommended services for securely storing API keys, credentials, and other secrets. They provide encryption, access control, rotation, and auditing. Lambda environment variables can be encrypted but aren't designed for secret rotation. Never hardcode secrets in code or store them in DynamoDB or S3 intended for application data.
Correct Answer Is:
B
An Alexa skill encounters DynamoDB capacity errors during peak usage. What solution should be implemented?
- A. Increase Lambda memory
- B. Switch to DynamoDB on-demand capacity mode or increase provisioned capacity
- C. Cache all data in Lambda
- D. Reduce skill functionality
Explanation
Switch to DynamoDB on-demand capacity mode (automatic scaling) or increase provisioned capacity with auto-scaling enabled. On-demand mode handles unpredictable traffic patterns without capacity planning. For predictable patterns, use provisioned mode with auto-scaling. Monitor CloudWatch metrics to understand access patterns. Implement error handling with exponential backoff for transient capacity errors.
Correct Answer Is:
B
An Alexa skill needs to track user engagement metrics. What should be measured?
- A. Code execution time only
- B. Session frequency, duration, feature usage, retention, conversion rates, and user sentiment
- C. Lambda invocations only
- D. Error counts only
Explanation
Measure comprehensive engagement metrics: session frequency (how often users return), session duration, feature usage (which intents/features are used), retention cohorts (how many users return over time), conversion rates for key actions, and user sentiment (reviews, feedback). Combine Alexa analytics with custom CloudWatch metrics for complete visibility. Use metrics to drive improvements.
Correct Answer Is:
B
An Alexa skill needs to detect and handle dialog errors. What should be implemented?
- A. Lambda error handlers only
- B. Error handlers in ASK SDK with appropriate user-facing error messages
- C. CloudWatch alarms
- D. DynamoDB error logging
Explanation
Implement error handlers in ASK SDK to catch and gracefully handle errors. Error handlers receive errors from request handlers and should return user-friendly error messages without exposing technical details. Log full error details to CloudWatch for debugging. Proper error handling improves user experience during failures and aids troubleshooting. Error handlers are essential for production skills.
Correct Answer Is:
B
An Alexa skill needs to handle payments. Which feature should be implemented?
- A. Amazon Pay integration
- B. Custom payment processing in Lambda
- C. Stripe API integration
- D. DynamoDB transaction records
Explanation
Amazon Pay integration is the recommended method for handling payments in Alexa skills. It provides a secure, PCI-compliant payment solution with a voice-optimized user experience. Users can link their Amazon account and make purchases using voice. Alternative payment integrations are not supported by Alexa and would violate skill certification requirements.
Correct Answer Is:
A
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