EMC D-DS-FN-23 Actual Free Exam Questions & Community Discussion

You are attempting to find the Euclidean distance between two centroids:
Centroid A's coordinates: (X = 2, Y = 4)
Centroid B's coordinates (X = 8, Y = 10)
Which formula finds the correct Euclidean distance?

Under which circumstance do you need to implement N-fold cross-validation after creating a regression model?

What does a branch represent in a decision tree?

To ensure a successful analytic project, which key role can provide business domain expertise with a deep understanding of the data and key performance indicators?

When creating a presentation for a technical audience, what is the main objective?

Which analytic technique would be appropriate to estimate blood pressure based on age and weight?

Which term is used to describe separating a database into separate parts that can be processed in parallel?

You submit a MapReduce job to a Hadoop cluster. Although the job was successfully submitted, you notice that it is not completing.
What should be done?

To ensure a successful analytic project, which key role can consult and advise the project team on the value of end results and how these will be used on a daily basis?

Which SQL OLAP extension provides all possible grouping combinations?

You fit a Logistic Regression model to your training data and notice that the variable X has an infinite magnitude coefficient.
What does this indicate?

You have been assigned to do a study of the daily revenue effect of a pricing model of online transactions.
All the data currently available to you has been loaded into your analytics database; revenue data, pricing data, and online transaction data.
You find that all the data comes in different levels of granularity. The transaction data has timestamps (day, hour, minutes, seconds), pricing is stored at the daily level, and revenue data is only reported monthly.
What is your next step?

A fair six-sided die is rolled. Let A denote the event that an odd number is rolled. Let C denote the event that a 1, 2, or 3 is rolled.
What is the value of the conditional probability, P(C|A)?

You have been assigned to perform a study of the daily revenue effect of a pricing model of online transactions. All data currently available to you has been loaded into your analytics database. This includes revenue data, pricing data, and online transaction data.
You discover that all data comes in different levels of granularity. The transaction data has timestamps consisting of day, hour, minutes, and seconds. Pricing is stored at the daily level and revenue data is only reported monthly.
What is the next step?

Data has been collected on visitors' viewing habits at a bank's website.
Which technique is used to identify pages commonly viewed during the same visit to the website?