D-DS-FN-23

D-DS-FN-23 practice questions, page 2 of 3, with answer review and explanations.

Question 6

A decision tree is being built. An internal node is being evaluated for partitioning on variables A and B. The entropy of the internal node is 0.8. The entropy for each of the variables is as follows: Variable A: 0.5 - Variable B: 0.4 - Which variable will be used to partition the data and what is the information gain?

  1. Variable B; information gain is 0.1
  2. Variable B; information gain is 0.4
  3. Variable A; information gain is 0.1
  4. Variable A; information gain is 0.5

Question 7

In association rules, given items X and Y, what does lift measure?

  1. Percentage of transactions that contain an itemset with X
  2. Percentage of transactions with X that also contain Y
  3. Difference in the probability of X and Y appearing together compared with expectations as if they were statistically independent
  4. How many times more often X and Y occur together than expected if they were statistically independent, expressed as a ratio

Question 8

What are categorized as cluster and workflow management tools for Hadoop?

  1. Flume, Sqoop, and Storm
  2. Drill, Hive, and HBase
  3. Spark, Tez, and Cassandra
  4. Ambari, Oozie, and Zookeeper

Question 9

Consider the following text: “Stop!” he shouted. “Don’t go there!” What set of words result from using a tokenizer for punctuation on the text?

  1. Stop, he, shouted, don, t, go, there
  2. Stop, he shouted, don, t go there
  3. Stop, he shouted, dont go there
  4. Stop, he, shouted, dont, go, there

Question 10

Which phase of the data analytic lifecycle includes conducting project sponsor interviews and drafting a problem statement?

  1. Operationalize
  2. Model planning
  3. Model building
  4. Discovery