DELL EMC D-DS-FN-23 Dell Data Science Foundations 2023 Online Training
DELL EMC D-DS-FN-23 Online Training
The questions for D-DS-FN-23 were last updated at Jan 30,2025.
- Exam Code: D-DS-FN-23
- Exam Name: Dell Data Science Foundations 2023
- Certification Provider: DELL EMC
- Latest update: Jan 30,2025
Which method is used to solve for coefficients b0, b1, .., bn in your linear regression model: Y = b0 + b1x1+b2x2+….+bnxn
- A . Ordinary Least squares
- B . Apriori Algorithm
- C . Ridge and Lasso
- D . Integer programming
What is one modeling or descriptive statistical function in MADlib that is typically not provided in a standard relational database?
- A . Linear regression
- B . Expected value
- C . Variance
- D . Quantiles
Refer to the exhibit.
You are using K-means clustering to classify customer behavior for a large retailer. You need to determine the optimum number of customer groups. You plot the within-sum-of- squares (wss) data as shown in the exhibit.
How many customer groups should you specify?
- A . 2
- B . 3
- C . 4
- D . 8
Which activity is performed in the Operationalize phase of the Data Analytics Lifecycle?
- A . Define the process to maintain the model
- B . Try different analytical techniques
- C . Try different variables
- D . Transform existing variables
Which word or phrase completes the statement; “A theater actor is to ‘artistic and expressive’ as a data scientist is to.”?
- A . Communicative and collaborative
- B . Introverted and technical
- C . Logical and steadfast
- D . Independent and intelligent
When is the GROUP BY ROLLUP clause used in an OLAP query?
- A . All subtotals and grand totals are to be included in the output
- B . Subtotals are only to be included in the output
- C . Grand totals are only to be included in the output
- D . Specific subtotals and grand totals for a combination of variables are only to be included in the output
You have run the association rules algorithm on your data set, and the two rules {banana, apple} => {grape} and {apple, orange}=> {grape} have been found to be relevant.
What else must be true?
- A . {grape, apple, orange} must be a frequent itemset.
- B . {banana, apple, grape, orange} must be a frequent itemset.
- C . {grape} => {banana, apple} must be a relevant rule.
- D . {banana, apple} => {orange} must be a relevant rule.
Which type of numeric value does a logistic regression model estimate?
- A . Probability
- B . A p-value
- C . Any integer
- D . Any real number
You are having a discussion with a business colleague. The colleague mentions that they want to perform K-means clustering on text file data stored in HDFS.
Which tool should be recommended?
- A . Mahout
- B . HBase
- C . Scribe
- D . Sqoop
In which phase of the data analytics lifecycle do Data Scientists spend the most time in a project?
- A . Discovery
- B . Data Preparation
- C . Model Building
- D . Communicate Results
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