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Dell EMC Data Science and BigData Certification Questions and Answers



Question : Refer to the Exhibit.
In the Exhibit, the table shows the values for the
input Boolean attributes "A", "B", and "C". It also
shows the values for the output attribute "class".
Which decision tree is valid for the data?

: Refer to the Exhibit.
1. Tree A
2. Tree B
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4. Tree D



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Explanation:





Question : Refer to the Exhibit.
In the Exhibit, the table shows the values for the
input Boolean attributes "A", "B", and "C". It also
shows the values for the output attribute "class".
Which decision tree is valid for the data?
: Refer to the Exhibit.
1. Tree A
2. Tree B
 3. Access Mostly Uused Products by 50000+ Subscribers
4. Tree D



Correct Answer : Get Lastest Questions and Answer :

Explanation:





Question : Refer to the exhibit.
You are assigned to do an end of the year sales analysis of 1, 000 different products,
based on the transaction table. Which column in the end of year report requires the
use of a window function?
: Refer to the exhibit.
1. Total Sales to Date
2. Daily Sales
 3. Access Mostly Uused Products by 50000+ Subscribers
4. Maximum Price



Correct Answer : Get Lastest Questions and Answer :

Explanation:



Related Questions

Question A data scientist plans to classify the sentiment polarity of , product reviews collected from
the Internet. What is the most appropriate model to use? Suppose labeled training data is
available.


 A data scientist plans to classify the sentiment polarity of , product reviews collected from
1. Linear regression

2. Logistic regression

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4. Naive Bayesian classifier




Question : When would you use GROUP BY ROLLUP clause in your OLAP query?

 : When would you use GROUP BY ROLLUP clause in your OLAP query?
1. where only the subtotals are to be included in the output
2. where only the grand totals are to be included in the output
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in the output
4. where all subtotals and grand totals are to be included in the output


Question : Which type of numeric value does a logistic regression model estimate?
 : Which type of numeric value does a logistic regression model estimate?
1. A p-value
2. Any integer
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4. Any real number


Question : Your colleague, who is new to Hadoop, approaches you with a question. They want to know how
best to access their data. This colleague has a strong background in data flow languages and
programming.
Which query interface would you recommend?

 : Your colleague, who is new to Hadoop, approaches you with a question. They want to know how
1. Hive
2. Pig
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4. HBase



Question : The web analytics team uses Hadoop to process access logs. They now want to correlate this
data with structured user data residing in a production single-instance JDBC database. They
collaborate with the production team to import the data into Hadoop. Which tool should they use?
 : The web analytics team uses Hadoop to process access logs. They now want to correlate this
1. Chukwa
2. Sqoop
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4. Flume




Question : What does the R code
z <- f[1:10, ]
do?

 : What does the R code
1. Assigns the 1st 10 columns of the 1st row of f to z
2. Assigns a sequence of values from 1 to 10 to z
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4. Assigns the first 10 rows of f to the vector z