Practice Set 2

A Machine Learning Specialist receives customer data for an online shopping website. The data includes demographics, past visits, and locality information. TheSpecialist must develop a machine learning approach to identify the customer shopping patterns, preferences, and trends to enhance the website for better service and smart recommendations.Which solution should the Specialist recommend? [{"voted_answers": "C", "vote_count": 9, "is_most_voted": true}, {"voted_answers": "A", "vote_count": 1, "is_most_voted": false}]

A Machine Learning Specialist is working with a large company to leverage machine learning within its products. The company wants to group its customers into categories based on which customers will and will not churn within the next 6 months. The company has labeled the data available to the Specialist.Which machine learning model type should the Specialist use to accomplish this task? [{"voted_answers": "B", "vote_count": 11, "is_most_voted": true}]

The displayed graph is from a forecasting model for testing a time series.Considering the graph only, which conclusion should a Machine Learning Specialist make about the behavior of the model? [{"voted_answers": "A", "vote_count": 3, "is_most_voted": true}, {"voted_answers": "B", "vote_count": 1, "is_most_voted": false}]

A company wants to classify user behavior as either fraudulent or normal. Based on internal research, a Machine Learning Specialist would like to build a binary classifier based on two features: age of account and transaction month. The class distribution for these features is illustrated in the figure provided.Based on this information, which model would have the HIGHEST accuracy? [{"voted_answers": "C", "vote_count": 10, "is_most_voted": true}]

A Machine Learning Specialist at a company sensitive to security is preparing a dataset for model training. The dataset is stored in Amazon S3 and containsPersonally Identifiable Information (PII).The dataset:✑ Must be accessible from a VPC only.✑ Must not traverse the public internet.How can these requirements be satisfied? [{"voted_answers": "A", "vote_count": 13, "is_most_voted": true}, {"voted_answers": "B", "vote_count": 2, "is_most_voted": false}]

During mini-batch training of a neural network for a classification problem, a Data Scientist notices that training accuracy oscillates.What is the MOST likely cause of this issue? [{"voted_answers": "D", "vote_count": 11, "is_most_voted": true}]

An employee found a video clip with audio on a company's social media feed. The language used in the video is Spanish. English is the employee's first language, and they do not understand Spanish. The employee wants to do a sentiment analysis.What combination of services is the MOST efficient to accomplish the task? [{"voted_answers": "A", "vote_count": 10, "is_most_voted": true}]

A Machine Learning Specialist is packaging a custom ResNet model into a Docker container so the company can leverage Amazon SageMaker for training. TheSpecialist is using Amazon EC2 P3 instances to train the model and needs to properly configure the Docker container to leverage the NVIDIA GPUs.What does the Specialist need to do? [{"voted_answers": "B", "vote_count": 12, "is_most_voted": true}]

A Machine Learning Specialist is building a logistic regression model that will predict whether or not a person will order a pizza. The Specialist is trying to build the optimal model with an ideal classification threshold.What model evaluation technique should the Specialist use to understand how different classification thresholds will impact the model's performance? [{"voted_answers": "A", "vote_count": 6, "is_most_voted": true}]

An interactive online dictionary wants to add a widget that displays words used in similar contexts. A Machine Learning Specialist is asked to provide word features for the downstream nearest neighbor model powering the widget.What should the Specialist do to meet these requirements? [{"voted_answers": "D", "vote_count": 25, "is_most_voted": true}]