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NEW QUESTION # 225
A financial company is building an ML model to classify fraudulent transactions based on customer data and transaction patterns. The company wants to evaluate the model's performance. The company must ensure that the model makes correct predictions and minimizes false positives.
Which evaluation metric will meet these requirements?
Answer: B
Explanation:
The verified answer is C. F1 score. This is a classification problem: the model classifies transactions as fraudulent or non-fraudulent. AWS machine learning documentation identifies accuracy, precision, recall, and F1 score as classification evaluation metrics. F1 score is especially appropriate when the evaluation must consider both correct positive predictions and the cost of incorrect positive predictions. AWS defines F1 as the harmonic mean of precision and recall, which means it balances how many positive predictions are correct with how many actual positive cases are found.
The key issue in the question is minimizing false positives. In fraud detection, a false positive means a legitimate transaction is incorrectly classified as fraudulent. AWS documentation explains that precision evaluates how well the model avoids false positives by measuring the percentage of positive predictions that were actually correct. Because F1 includes precision, it penalizes models that generate too many false positives while also considering recall.
Accuracy is not the best answer because it only measures the overall fraction of correct predictions. In fraud detection, the dataset is often imbalanced, so a model can appear accurate while still performing poorly on fraud-related predictions. R-squared and RMSE are regression metrics, not classification metrics. R-squared measures how well a regression model explains variance, and RMSE measures prediction error magnitude for continuous numeric outputs.
Because the company needs a classification metric that reflects correct predictions and penalizes false- positive behavior, F1 score is the strongest option among the choices.
NEW QUESTION # 226
Which option is a characteristic of AI governance frameworks for building trust and deploying human- centered AI technologies?
Answer: C
Explanation:
AI governance frameworks aim to build trust and deploy human-centered AI technologies by establishing guidelines and policies for data usage, transparency, responsible AI practices, and compliance with regulations. This ensures ethical and accountable AI development and deployment.
Exact Extract from AWS AI Documents:
From the AWS Documentation on Responsible AI:
"AI governance frameworks establish trust in AI technologies by developing policies and guidelines for data management, transparency, responsible AI practices, and compliance with regulatory requirements, ensuring human-centered and ethical AI deployment." (Source: AWS Documentation, Responsible AI Governance) Detailed Explanation:
* Option A: Expanding initiatives across business units to create long-term business valueWhile expanding initiatives can drive value, it is not a core characteristic of AI governance frameworks focused on trust and human-centered AI.
* Option B: Ensuring alignment with business standards, revenue goals, and stakeholder expectationsAlignment with business goals is important but not specific to AI governance frameworks for building trust and ethical AI deployment.
* Option C: Overcoming challenges to drive business transformation and growthOvercoming challenges is a general business goal, not a defining characteristic of AI governance frameworks.
* Option D: Developing policies and guidelines for data, transparency, responsible AI, and complianceThis is the correct answer. This option directly describes the core components of AI governance frameworks that ensure trust and ethical AI deployment.
References:
AWS Documentation: Responsible AI Governance (https://aws.amazon.com/machine-learning/responsible-ai/) AWS AI Practitioner Learning Path: Module on AI Governance AWS Well-Architected Framework: Machine Learning Lens (https://docs.aws.amazon.com/wellarchitected
/latest/machine-learning-lens/)
NEW QUESTION # 227
A company is using an Amazon Bedrock base model to summarize documents for an internal use case. The company trained a custom model to improve the summarization quality.
Which action must the company take to use the custom model through Amazon Bedrock?
Answer: B
Explanation:
To use a custom model that has been trained to improve summarization quality, the company must deploy the model on an Amazon SageMaker endpoint. This allows the model to be used for real-time inference through Amazon Bedrock or other AWS services. By deploying the model in SageMaker, the custom model can be accessed programmatically via API calls, enabling integration with Amazon Bedrock.
Option B (Correct): "Deploy the custom model in an Amazon SageMaker endpoint for real-time inference":
This is the correct answer because deploying the model on SageMaker enables it to serve real-time predictions and be integrated with Amazon Bedrock.
Option A: "Purchase Provisioned Throughput for the custom model" is incorrect because provisioned throughput is related to database or storage services, not model deployment.
Option C: "Register the model with the Amazon SageMaker Model Registry" is incorrect because while the model registry helps with model management, it does not make the model accessible for real-time inference.
Option D: "Grant access to the custom model in Amazon Bedrock" is incorrect because Bedrock does not directly manage custom model access; it relies on deployed endpoints like those in SageMaker.
AWS AI Practitioner References:
Amazon SageMaker Endpoints: AWS recommends deploying models to SageMaker endpoints to use them for real-time inference in various applications.
NEW QUESTION # 228
Which AW5 service makes foundation models (FMs) available to help users build and scale generative AI applications?
Answer: A
Explanation:
Amazon Bedrock is a fully managed service that provides access to foundation models (FMs) from various providers, enabling users to build and scale generative AI applications. It simplifies the process of integrating FMs into applications for tasks like text generation, chatbots, and more.
Exact Extract from AWS AI Documents:
From the AWS Bedrock User Guide:
"Amazon Bedrock is a fully managed service that makes foundation models (FMs) from leading AI providers available through a single API, enabling developers to build and scale generative AI applications with ease." (Source: AWS Bedrock User Guide, Introduction to Amazon Bedrock) Detailed Explanation:
* Option A: Amazon Q DeveloperAmazon Q Developer is an AI-powered assistant for coding and AWS service guidance, not a service for hosting or providing foundation models.
* Option B: Amazon BedrockThis is the correct answer. Amazon Bedrock provides access to foundation models, making it the primary service for building and scaling generative AI applications.
* Option C: Amazon KendraAmazon Kendra is an intelligent search service powered by machine learning, not a service for providing foundation models or building generative AI applications.
* Option D: Amazon ComprehendAmazon Comprehend is an NLP service for text analysis tasks like sentiment analysis, not for providing foundation models or supporting generative AI.
References:
AWS Bedrock User Guide: Introduction to Amazon Bedrock (https://docs.aws.amazon.com/bedrock/latest
/userguide/what-is-bedrock.html)
AWS AI Practitioner Learning Path: Module on Generative AI Services
AWS Documentation: Generative AI on AWS (https://aws.amazon.com/generative-ai/)
NEW QUESTION # 229
A company has multiple datasets that contain historical dat
a. The company wants to use ML technologies to process each dataset.
Select the correct ML technology from the following list for each dataset. Select each ML technology one time or not at all. (Select THREE.) Computer vision Natural language processing (NLP) Reinforcement learning Time series forecasting
Answer:
Explanation:
NEW QUESTION # 230
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