Data Science Analysis Q&A

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

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

It writes the output of the Map function to storage.

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

It distributes the input to multiple nodes for processing.

Correct! Wrong!

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?

Ensure that the JobTracker is running

Ensure that the TaskTracker is running

Ensure that a datanode is running

Ensure that the NameNode is running

Correct! Wrong!

When would a Wilcoxson Rank Sum test be appropriate?

When the data can easily be sorted

When the populations represent the sums of other values

When the data cannot easily be sorted

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

Correct! Wrong!

What data science requirement is the most fundamental?

Learn/Optimize

Collect

Explore/ Transform

Move/Store

Correct! Wrong!

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?

Regression

Classification

Clustering

Association Rules

Correct! Wrong!

Explanation:
Association rules are merely descriptive; they give an overview of how the qualities relate to one another as shown by the examples in the existing data set.

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?

Association Rules

Logistic Regression

K Means Clustering

None of the above

Correct! Wrong!

Explanation:
Clustering is a type of unsupervised learning, denoted by the letter K. When they have a ton of unlabeled data, data scientists use it (any info without defined groups or categories.) K denotes that data for different groups are sought after by clustering.

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?

It is not structured

It is too centralized

It is too processed

It is not normalized

Correct! Wrong!

FREE Data Science Analysis Question and Answers

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

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?

When would a Wilcoxson Rank Sum test be appropriate?

What data science requirement is the most fundamental?

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?

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?

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?

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