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Free Practice Questions for the DELL EMC EMCDS E20-065 Exam (2026 Updated)

At Marks4sure, we are dedicated to providing IT professionals with the most accurate and reliable preparation materials for the DELL EMC E20-065 exam. To support your certification journey, we have made a selection of our premium 2026 EMCDS practice questions and answers available completely free. You can take this practice test as many times as you need. Every question includes a detailed, expertly verified explanation to ensure you fully grasp the core security concepts before test day.

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Questions 4

What is an intended application of the MapReduce framework?

Options:

A.

Processing can be broken into smaller pieces

B.

Processing a large number of small files

C.

Processing in real time is required

D.

Processing a small subset of data

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Questions 5

In the graph, which edge would be considered a weak lie?

Refer to the exhibit.

E20-065 Question 5

Options:

A.

C-E

B.

E-F

C.

B-C

D.

G-l

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Questions 6

What process must address acoustic ambiguity in NLP?

Options:

A.

Part-of-speech tagging

B.

Word sense disambiguation

C.

Speech recognition

D.

Discourse

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Questions 7

A hotel chain runs a simul - ation on room pricing. They want to estimate revenue, per hotel, within +/- $10 with 95% confidence (Za/2=1.96). The estimated revenue standard deviation is $5000 based on previous booking data.

What is the optimal number of simulation trials to run?

    Options:

    A.

    A 32-bit operating system was used

    B.

    The same number of trials was used

    C.

    A linear congruential generator (LCG) was used (or pseudo-random number generation

    D.

    Different seeds tor the random number generator were used.

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    Questions 8

    Which representation is most suitable for a small and highly connected network?

    Options:

    A.

    Edge list

    B.

    Adjacency matrix

    C.

    Eigenvector centrality

    D.

    Adjacency list

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    Questions 9

    What is a random subspace of features, as used by Random Forests?

    Options:

    A.

    A random subset of features that are chosen at each split in the decision tree

    B.

    Filtration of data that does not meet a pre-defined weighting thrsehold

    C.

    The creation of out-of-bag (OOB) data that is used to select features

    D.

    Removal of highly correlated variables to randomize the features

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    Questions 10

    How is the relative value of a node visualized in a sunburst?

    Options:

    A.

    Color

    B.

    Area

    C.

    Gradient

    D.

    Position

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    Questions 11

    What is an effective use of color in visualization?

    Options:

    A.

    Use self-explanatory colors so a legend is unnecessary

    B.

    Maximize use of color to make a more lasting impression

    C.

    Use high contrast colors such as red and blue

    D.

    Minimize use of color except for emphasis

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    Questions 12

    What is a characteristic of spark?

    Options:

    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

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    Questions 13

    What is an ideal use case for HDFS?

    Options:

    A.

    Storing files that are updated frequently

    B.

    Storing files that are written once and read many times

    C.

    Storing results between Map steps and Reduce steps

    D.

    Storing application files in memory

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    Questions 14

    In which step in the visualization lifecycle would you determine how the raw data is stored?

    Options:

    A.

    Visualization Planning

    B.

    Data Preparation

    C.

    Visualization Building

    D.

    Discovery

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    Questions 15

    What runs more efficiently because of Apache Tez?

    Options:

    A.

    Pig and Hive

    B.

    Hive and HBase

    C.

    Yarn and Spark

    D.

    All MapReduce jobs

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    Questions 16

    What is a characteristic of stop words?

    Options:

    A.

    Used in term frequency analysis

    B.

    Include words such as " a " , " an " , and " the "

    C.

    Meaningful words requiring a parser to stop and examine them

    D.

    Don ' t occur often in text

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    Questions 17

    In a connected, undirected graph of 5 nodes with 10 edges, how many more edges need to be added to make the clustering coefficient of every node equal 1 ?

    Options:

    A.

    0

    B.

    5

    C.

    10

    D.

    15

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    Questions 18

    Which graph structure would best model the relationship between job seekers and employers?

    Options:

    A.

    Bipartite

    B.

    Weighted

    C.

    Directed acyclic

    D.

    Ranked

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    Questions 19

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

    Options:

    A.

    Encryption

    B.

    Replication

    C.

    Namenode federation

    D.

    Snapshots

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    Exam Code: E20-065
    Exam Name: Advanced Analytics Specialist Exam for Data Scientists
    Last Update: Jul 29, 2026
    Questions: 66

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