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Free D-DS-FN-23 Exam Braindumps
Dell Certified Data Science Foundations Questions 11–15 (page: 4)

Updated On: 10-Feb-2026
Page 4 of 13
PDF with 59 Questions

In time series analysis, what statement describes a MA(q) process?

  1. Current deviation from the time series mean depends on the q previous deviations
  2. Current deviation from the time series mean depends on the quotient q
  3. Current time series value depends on the q previous values
  4. Current time series value depends on the fitted polynomial of order q

Answer(s): A



After running a density plot you realize that the data has a long tail to the right.
What can you do to make the dataset more normally distributed?

  1. Use a scatter plot to obtain a better picture
  2. Use a histogram to obtain a better picture
  3. Apply a square transformation
  4. Apply a logarithmic transformation

Answer(s): D



Which R function plots a distribution of a single variable along two different axes?

  1. table()
  2. summaryQ
  3. density ()
  4. rug()

Answer(s): D



What action occurs during feature selection in the model building phase of the data analytics lifecycle?

  1. Create new combinations of attributes
  2. Overfit the model to improve prediction accuracy
  3. Identify the most useful input variables
  4. Select a superset of variables to shorten training times

Answer(s): C



Which Hadoop service responds to requests for compute and memory resources?

  1. Application Manager
  2. DataNode
  3. Scheduler
  4. Application Master

Answer(s): C



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