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SDS Senior Data Scientist Questions and Answers

Questions 4

A workflow refers to a:

Options:

A.

Directed cyclic graph

B.

Indirected cyclic graph

C.

Directed acyclic graph

D.

Indirected acyclic graph

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Questions 5

Which classification steps are performed in inductive techniques?

i. Training Step

ii. Test Step

iii. Validation Step

iv. Application Step

Options:

A.

i, ii

B.

ii, iii

C.

i, ii, iv

D.

i, ii, iii, iv

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Questions 6

Which of the following is TRUE for "By" analysis?

Options:

A.

The "By" analysis technique reinforces the process of "thinking like a data scientist."

B.

"By" analysis is a technique by which business subject matter experts (SMEs) and the Data Science team could collaborate to uncover new variables and metrics that might be better predictors of business performance.

C.

"By" analysis is used to create a collaborative technique to drive alignment between the business users and the data scientists to identify and brainstorm variables and metrics that might be better predictors of business performance.

D.

Both B and C

E.

All of the above

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Questions 7

Which of the following is a "thinking like a data scientist" decomposition process?

Options:

A.

Business Initiative

B.

Business Stakeholder

C.

Strategic Nouns

D.

Both B and C

E.

All of the above

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Questions 8

The Big Data Vision Workshop process is ideal for organizations who:

Options:

A.

Have a desire to leverage Big Data to transform their business but do not know where and how to start

B.

Have a wealth of data that they do not know how to monetize

C.

Have a desire to leverage the Big Data Vision Workshop to identify where and how to leverage data and analytics to power their business models

D.

Both A and B

E.

All of the above

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Questions 9

Which of the following is TRUE for data lake?

Options:

A.

The data lake can make both of the Business Intelligence and Data Science environments more agile and more productive

B.

The data lake enables organizations to gather, manage, enrich, and analyze many new sources of data, whether structured or unstructured

C.

The data lake enables organizations to treat data as an organizational asset to be gathered and nurtured versus a cost to be minimized

D.

The data lake can make both of the Business Intelligence and Data Science environments less agile and more productive

E.

None of the above

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Questions 10

JSON takes hierarchical data structures and serializes them into:

Options:

A.

Plain text format

B.

Plain string format

C.

Any desired format

D.

Both A and B

E.

None of the above

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Questions 11

What is Scrumban?

Options:

A.

It is Scrum

B.

It is Kanban

C.

It combines the principles of Scrum and Kanban into a pull-based system

D.

It combines the principles of Scrum and Kanban into a push-based system

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Questions 12

What is TRUE for “rehashing”?

Options:

A.

Allocate a new, larger hash table in memory

B.

It requires a new hash function, which maps values into a larger range of integers

C.

Key/value pairs from the original table can be inserted into the new, larger one

D.

Both A and B

E.

All of the above

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Questions 13

Which of the following is NOT a process of Use Case?

Options:

A.

Understand your organization's key business initiatives or business challenge

B.

Identify your key business stakeholders

C.

Capture the decisions that the key business stakeholders need to make in order to support the organization's key business initiatives

D.

Brainstorm the outcomes that the key stakeholders need to answer to facilitate making the decisions

E.

Brainstorm the questions that the key stakeholders need to answer to facilitate making the decisions

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Questions 14

Maximum Likelihood Estimation (MLE) is a way to frame:

Options:

A.

Large class of problems in Data Science

B.

Small class of problems in Data Science

C.

Large class of problems in HDFS

D.

Small class of problems in HDFS

E.

Both A and C

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Questions 15

Which of the following is NOT a valid section of Big Data Strategy document?

Options:

A.

Business strategy

B.

Key decisions

C.

Business decisions

D.

Key business initiatives

E.

Key business entities

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Questions 16

Which of the following is used to summarize a dataset by showing the median, quantiles, and min/max values for each of the variables?

Options:

A.

Box Plots

B.

Pie Charts

C.

Histogram

D.

Scatter Chart

E.

Bar Charts

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Questions 17

Which of these statements reflects a null hypothesis?

Options:

A.

There will be no relationship between caffeine consumption and performance

B.

Men will score higher than women on spatial awareness

C.

Women will score higher than men on empathy

D.

There will be a significant difference between group 1 and group 2

E.

As temperature increases, so too will the level of aggression

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Questions 18

Which of the following is correct for Markov chain?

Options:

A.

A Markov chain is a sequence of fixed variables X1, X2

B.

A Markov chain is the state of a system at sequential points in time

C.

A Markov chain is a sequence of random variables X1, X2

D.

Both A and B

E.

Both B and C

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Questions 19

Which of the following errors refers to the wrong negation of a true null hypothesis?

Options:

A.

Type I Error

B.

Type II Error

C.

Logical Error

D.

Hypothesis Error

E.

None of the above

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Questions 20

The grid computing environment uses a middleware to:

Options:

A.

Divide computing resources

B.

Combine computing resources

C.

Both A and B

D.

None of the above

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Questions 21

Which of the following is NOT used to implement Agile?

Options:

A.

Scrum

B.

Kanban

C.

Six Sigma

D.

Extreme Programming (XP)

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Questions 22

Which of the following is an example of graphical model?

Options:

A.

Markov Random Fields

B.

Bayesian Networks

C.

Geographical Networks

D.

Both A and B

E.

Both A and C

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Questions 23

Which of the following phases is NOT a Big Data Business Model Maturity Index?

Options:

A.

Business Monitoring

B.

Business Optimization

C.

Business Strategy

D.

Data Monetization

E.

Business Metamorphosis

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Questions 24

What is DevOps?

Options:

A.

Software Development

B.

Software Operations

C.

Quality Assurance

D.

All

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Questions 25

SpamAssassin has been developed to detect:

Options:

A.

Spam emails

B.

Email with big attachments

C.

Email with virus

D.

None of the above

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Exam Code: SDS
Exam Name: Senior Data Scientist
Last Update: Aug 24, 2025
Questions: 85
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