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E20-065 EMC Advanced Analytics Specialist Exam for Data Scientists Free Practice Exam Questions (2025 Updated)

Prepare effectively for your EMC E20-065 Advanced Analytics Specialist Exam for Data Scientists certification with our extensive collection of free, high-quality practice questions. Each question is designed to mirror the actual exam format and objectives, complete with comprehensive answers and detailed explanations. Our materials are regularly updated for 2025, ensuring you have the most current resources to build confidence and succeed on your first attempt.

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Total 66 questions

What do lemmatization and stemming have in common?

A.

Use WordNet

B.

Remove common words in a natural language

C.

Reduce the high dimensionality in text

D.

Use a set of heuristics

Why would a company decide to use HBase to replace an existing relational database?

A.

It is required for performing ad-hoc queries.

B.

Varying formats of input data requires columns to be added in real time.

C.

The company's employees are already fluent in SQL.

D.

Existing SQL code will run unchanged on HBase.

What best describes the meaning behind the phrase "Six Degrees of Separation'"?

A.

Ability to use about six hops to reach any other node in an extremely large social network

B.

Erdos number of all scholars having written papers with Paul Erdos

C.

Maximum number of edges between nodes in a graph with a diameter of six

D.

Typical distance between nodes that are connected by triadic closure

A data engineer is asked to process several large datasets using MapReduce. Upon initial inspection the engineer realizes that there are complex interdependencies between the datasets.

Why is this a problem?

A.

MapReduce works best on unstructured data

B.

There is no problem; MapReduce accommodates all the data

C.

MapReduce can only parse one file at a time.

D.

MapReduce is not ideal when the processing of one dataset depends on another.

Consider the two sentences below.

    I mailed my credit card application to the bank

    We walked along the river bank until we came to a waterwheel

What type of NLP ambiguity might occur when interpreting the word "bank"?

A.

Discourse

B.

Syntactic

C.

Semantic

D.

Acoustic

Which metric would be most helpful in identifying a node that may cause network disruption if the node were removed?

A.

Degree

B.

Closeness

C.

Betweenness

D.

PageRank

What is the maximum number of edges in an undirected graph of 10 nodes?

A.

45

B.

90

C.

100

D.

9

What is a property of a good color model for ordinal data?

A.

Uses a rainbow-like color map for distinction of categories

B.

Uses a rainbow-like color map for ease of display and printing

C.

Uses perceptually ordinal colors with just-noticeable increments

D.

Uses perceptually ordinal colors with linear, perceptual increments

What are three of the eight visual variables?

A.

Selection, orientation, and mark

B.

Size, separation, and orientation

C.

Position, size, and orientation

D.

Position, texture, and selection

What is a characteristic of lemmatization?

A.

Can be performed by calling the synset () function on a lemma in LNTK

B.

Can be performed by calling the lemma() function on a synset in LNTK

C.

Reduces words of variant forms to their base forms based on a set of heuristics

D.

Reduces words of variant forms to their base forms based on a dictionary

The naive Bayer classifier is trained over 1600 movie reviews and then tested over 400 reviews.

Here is the resulting confusion matrix:

190 (TP) 10(FN)

80 (FP) 120(TN)

What are the precision, recall, and the F1-score values?

A.

Precision0.95; Recall: 0704; F1-score: 0.809

B.

Precision 0.613, Recall: 0.95, F1-score: 0.745

C.

Precision 0.704, Recall: 0.95; F1-score: 0.809

D.

Precision 0.95; Recall: 0.613; F1-score: 0.745

Which library is NOT part of the Apache Spark distribution?

A.

MLib

B.

NLTK

C.

GraphX

D.

Spark SQL

What advantage does replication provide while storing a file in HDFS?

A.

Data protection and scheduling flexibility

B.

Elimination of requirement for a combiner process

C.

Elimination of requirement for Shuffle and Sort process

D.

Memory optimization and minimizing tasks to run

What are key characteristics of regular lattices?

A.

Low clustering coefficients, high network diameters

B.

High clustering coefficients, small network diameters

C.

Low clustering coefficients; small network diameters

D.

High clustering coefficients; high network diameters

What is a key beneficial characteristic of the Random Forest algorithm?

A.

Provides and explanatory model

B.

Distinguishes categorical from continuous variables

C.

Support for unstructured data

D.

Resiliency to complex, non-linear variable interactions

What are the major components of the YARN architecture?

A.

ResourceManager and NodeManager

B.

Task Tracker and NameNode

C.

HDFS, Tez, and Spark

D.

Avro, ZooKeeper, and HDFS

What is a characteristic of spark?

A.

Unable to run map -> reduce execution plans

B.

Supports applications written in Python, Java, and Scala

C.

Less efficient processing small files than Hadoop MapReduce

D.

Supports workflows that can return to previous work steps

Which HDFS feature protects against user errors causing accidental loss of data?

A.

Encryption

B.

Replication

C.

Namenode federation

D.

Snapshots

After a client submits a job request to the YARN ResourceManager, what happens next?

A.

The scheduler allocates a container to run an ApplicationMaster

B.

The ResourceManager allocates containers to run map and reduce tasks

C.

The Resource Manager requests load data from the NodeManagers

D.

The ApplicationManager starts an ApplicationMaster

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Total 66 questions
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