最新的EMC Dell Data Science Foundations - D-DS-FN-23免費考試真題
When would you use GROUP BY ROLLUP clause in your OLAP query?
正確答案: C
If distributed Item-based Collaborative Filtering is an algorithm supported by Mahout, what is the use case category of the algorithm?
正確答案: A
Why do the Naïve Bayesian classifier implementations use the log of probability value rather than the pure probability value?
正確答案: A
Which R function plots a distribution of a single variable along two different axes?
正確答案: A
說明：（僅 Fast2test 成員可見）
The web analytics team uses Hadoop to process access logs. They now want to correlate this data with structured user data residing in their massively parallel database.
Which tool should they use to export the structured data from Hadoop?
Which tool should they use to export the structured data from Hadoop?
正確答案: B
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?
正確答案: D
說明：（僅 Fast2test 成員可見）
Which ROC curve represents a perfect model fit?
A)
B)
C)
D)
A)
B)
C)
D)
正確答案: B
What is an appropriate assignment for a data scientist?
正確答案: C
Refer to the exhibit.
To predict whether or not a customer will renew their annual property insurance policy, an insurance company built and operationalized a naive Bayes classification model. In the model, there are two class labels, renewal and non-renewal, that are assigned to each customer based on their attributes.
A subset of the key attributes, their values, and corresponding conditional probabilities are provided in the exhibit.
A customer has the following attributes:
# Age is greater than 65 years
# Owns their own home
# Renewal month is August
If 20% of customers do not renew the police every year, what is the score for a renewal in the naive Bayesian model for the customer described above?
正確答案: C
說明：（僅 Fast2test 成員可見）
What is the primary bottleneck in text classification?
正確答案: A
When is the GROUP BY ROLLUP clause used in an OLAP query?
正確答案: B
Based on the graphic, what should be done to begin addressing chart junk?
正確答案: C
Which relationship holds for a confusion matrix?
正確答案: A
In linear regression, what indicates that an estimated coefficient is significantly different than zero?
正確答案: A
You have created a scatterplot of two continuous variables for 2000 records. You want to add a line to the scatterplot to check linearity of the data.
Which function would best address this need?
Which function would best address this need?
正確答案: A