ראיון עבודה machine learning

Discuss, Learn and be Happy דיון בשאלות

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• »

Your company wants you to build an internal email text prediction model to speed up the time that employees spend writing emails. What should you do?

-

1

+

שאלה #69257

done		Include training email data from all employees.
		Include training email data from new employees.
		Include training email data from seasoned employees.
		Include training email data from employees who write the majority of internal emails.

• gavel
• mood_bad
• share

הגב

מיין לפי דירוג חדש ישן

Your organization allows people to create online professional profiles. A key feature is the ability to create clusters of people who are professionally connected to one another. What type of machine learning method is used to create these clusters?

-

1

+

שאלה #69258

done		unsupervised machine learning
		binary classification
		supervised machine learning
		reinforcement learning

• gavel
• mood_bad
• share

הגב

מיין לפי דירוג חדש ישן

Random forest is modified and improved version of which earlier technique?

-

1

+

שאלה #69259

		aggregated trees
		boosted trees
done		bagged trees
		stacked trees

• gavel
• mood_bad
• share

הגב

מיין לפי דירוג חדש ישן

Self-organizing maps are specialized neural network for which type of machine learning?

-

1

+

שאלה #69260

done		semi-supervised learning
		supervised learning
		reinforcement learning
		unsupervised learning

• gavel
• mood_bad
• share

הגב

מיין לפי דירוג חדש ישן

Which statement about K-means clustering is true?

-

1

+

שאלה #69261

sentiment_very_satisfied		In K-means clustering, the initial centroids are sometimes randomly selected.
		K-means clustering is often used in supervised machine learning.
		The number of clusters are always randomly selected.
		To be accurate, you want your centroids outside of the cluster.

• gavel
• mood_bad
• share

הגב

מיין לפי דירוג חדש ישן

You created machine learning system that interacts with its environment and responds to errors and rewards. What type of machine learning system is it?

-

1

+

שאלה #69262

		supervised learning
		semi-supervised learning
sentiment_very_satisfied		reinforcement learning
		unsupervised learning

• gavel
• mood_bad
• share

הגב

מיין לפי דירוג חדש ישן

Your data science team must build a binary classifier, and the number one criterion is the fastest possible scoring at deployment. It may even be deployed in real time. Which technique will produce a model that will likely be fastest for the deployment team use to new cases?

-

1

+

שאלה #69263

		random forest
done		logistic regression
		KNN
		deep neural network

• gavel
• mood_bad
• share

הגב

מיין לפי דירוג חדש ישן

our data science team wants to use the K-nearest neighbor classification algorithm. Someone on your team wants to use a K of 25. What are the challenges of this approach?

-

1

+

שאלה #69264

		Higher K values will produce noisy data.
		Higher K values lower the bias but increase the variance.
		Higher K values need a larger training set.
done		Higher K values lower the variance but increase the bias.

• gavel
• mood_bad
• share

הגב

מיין לפי דירוג חדש ישן

Your machine learning system is attempting to describe a hidden structure from unlabeled data. How would you describe this machine learning method?

-

1

+

שאלה #69265

		supervised learning
done		unsupervised learning
		reinforcement learning
		semi-unsupervised learning

• gavel
• mood_bad
• share

הגב

מיין לפי דירוג חדש ישן

You work for a large credit card processing company that wants to create targeted promotions for its customers. The data science team created a machine learning system that groups together customers who made similar purchases, and divides those customers based on customer loyalty. How would you describe this machine learning approach?

-

1

+

שאלה #69266

done		It uses unsupervised learning to cluster together transactions and unsupervised learning to classify the customers.
		It uses only unsupervised machine learning.
		It uses supervised learning to create clusters and unsupervised learning for classification.
		It uses reinforcement learning to classify the customers.

• gavel
• mood_bad
• share

הגב

מיין לפי דירוג חדש ישן

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• »