FREE Data Science Analysis Question and Answers

Question 1

On a bank's website, information has been gathered about visitors' viewing patterns. Which method is employed to determine which pages are frequently viewed simultaneously on the website?

Accepted Answer

Association Rules

Answer

Regression

Answer

Classification

Answer

Clustering

Question 2

The task of creating a model from a reporting data warehouse is given to a data scientist. The warehouse houses data that has been processed through a difficult, multi-stage ETL process using data gathered from numerous sources. What should the data scientist be worried about in terms of the data?

Accepted Answer

It is too processed

Answer

It is not structured

Answer

It is too centralized

Answer

It is not normalized

Question 3

When would a Wilcoxson Rank Sum test be appropriate?

Accepted Answer

When you cannot make an assumption about the distribution of the populations

Answer

When the data can easily be sorted

Answer

When the populations represent the sums of other values

Answer

When the data cannot easily be sorted

Question 4

What data science requirement is the most fundamental?

Accepted Answer

Collect

Answer

Learn/Optimize

Answer

Explore/ Transform

Answer

Move/Store

Question 5

What role does the Reduce function play in the MapReduce framework?

Accepted Answer

It distributes the input to multiple nodes for processing.

Answer

It breaks the input into smaller components and distributes it to other nodes in the cluster.

Answer

It writes the output of the Map function to storage.

Answer

It aggregates the results of the Map function and generates processed output.

Question 6

Therefore, recommendations may only be made based on the tone and topic matter of the present article. The magazine's whole collection of articles is kept in a database in a manner that is suited for analytics. Which approach ought the data scientist to test out first?

Accepted Answer

K Means Clustering

Answer

Association Rules

Answer

Logistic Regression

Answer

None of the above

Question 7

When you send a MapReduce task to a Hadoop cluster, you discover that even though it was sent successfully, the job has not yet been finished. What ought you to do?

Accepted Answer

Ensure that the TaskTracker is running

Answer

Ensure that the JobTracker is running

Answer

Ensure that a datanode is running

Answer

Ensure that the NameNode is running