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Senior Data Scientist Question and Answers

Senior Data Scientist

Last Update Sep 12, 2025
Total Questions : 85

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Questions 1

Which of the following is a useful feature of functional programming?

Options:

A.  

Higher-Order Functions (HOFs)

B.  

Immutable Data

C.  

Lazy Evaluation

D.  

All of the above

Discussion 0
Questions 2

A workflow refers to a:

Options:

A.  

Directed cyclic graph

B.  

Indirected cyclic graph

C.  

Directed acyclic graph

D.  

Indirected acyclic graph

Discussion 0
Questions 3

Self-driving car is an example of:

Options:

A.  

Supervised learning

B.  

Unsupervised learning

C.  

Reinforcement learning

D.  

All of the above

Discussion 0
Questions 4

Which of the following is an example of NLP?

Options:

A.  

Flagging e-mails as spam

B.  

Using Twitter to assess public sentiment

C.  

Finding which text documents are about similar topics

D.  

Both A and C

E.  

All of the above

Discussion 0
Questions 5

A burn down chart shows:

Options:

A.  

The declining energy of the team

B.  

The volume of work and features completed

C.  

The number of hours worked after dark

D.  

The rate of reduction of budget for a project

Discussion 0
Questions 6

The aim of developing Scribe was to offer reliability with using:

Options:

A.  

Extensive protocols

B.  

Complex protocols

C.  

High disk space usage

D.  

None of the above

Discussion 0
Questions 7

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

Discussion 0
Questions 8

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

Discussion 0
Questions 9

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

Discussion 0
Questions 10

Which of the following is correct about customer lifetime value (CLTV)?

i. Most organizations determine the current customer lifetime value (CLTV) based on historic sales over past 12 to 18 months

ii. The goal of the CLTV score is to help marketing and store personnel to determine the “value” of a customer

Options:

A.  

Only i

B.  

Only ii

C.  

Both i and ii

Discussion 0
Questions 11

Which of the following is FALSE for Social Network Analysis (SNA)?

Options:

A.  

Social Network Analysis (SNA) is an example of graph analysis

B.  

Social Network Analysis (SNA) is an example of trend analysis

C.  

SNA is used to investigate social structures and relationships across social networks

D.  

SNA characterizes networked structures in terms of nodes and the ties or edges that connect them

E.  

None of the above

Discussion 0
Questions 12

Which of the following statements is correct?

Options:

A.  

Apache claimed that Spark is able to run parallel jobs 100 times faster in memory and 10 times faster on disk in comparison to the traditional Hadoop MapReduce

B.  

Apache claimed that Spark is able to run parallel jobs 10 times faster in memory and 100 times faster on disk in comparison to the traditional Hadoop MapReduce

C.  

Apache claimed that Spark is able to run parallel jobs 1000 times faster in memory and 100 times faster on disk in comparison to the traditional Hadoop MapReduce

D.  

Apache claimed that Spark is able to run parallel jobs 50 times faster in memory and 5 times faster on disk in comparison to the traditional Hadoop MapReduce

Discussion 0
Questions 13

Which of the following is NOT a main data container in Python?

Options:

A.  

Lists

B.  

Tuples

C.  

LinkedList

D.  

Dict

Discussion 0
Questions 14

Designing an algorithm to play chess is usually an example of which type of machine learning?

Options:

A.  

Reinforcement learning

B.  

Pattern density

C.  

Supervised learning

D.  

Clustering

Discussion 0
Questions 15

Which of the following is CORRECT?

i. CDMO should NOT own the data lake, the data warehouse, or any of the underlying data architecture or technologies.

ii. CDMO should own the data lake, the data warehouse, or any of the underlying data architecture or technologies.

iii. CIO should NOT own the data lake, the data warehouse, or any of the underlying data architecture or technologies.

iv. CIO should own the data lake, the data warehouse, or any of the underlying data architecture or technologies.

Options:

A.  

i, iii

B.  

ii, iv

C.  

i, iv

D.  

ii, iii

Discussion 0
Questions 16

IoT is built on:

Options:

A.  

Cloud Computing

B.  

Networks of data gathering devices

C.  

Both A and B

D.  

None of the above

Discussion 0
Questions 17

Spark is written in:

Options:

A.  

Scala

B.  

Java

C.  

C

D.  

C++

E.  

Python

Discussion 0
Questions 18

In regression, the principle of machine learning is used to optimize the parameters to:

Options:

A.  

Minimize the approximation error

B.  

Calculate the closest possible outcomes

C.  

Both A and B

D.  

None of the above

Discussion 0
Questions 19

Which of the following is main Machine Learning Library in Python?

Options:

A.  

NumPy

B.  

Scikit-learn

C.  

Matplotlib

D.  

SciPy

E.  

None of the above

Discussion 0
Questions 20

Spark programs can be written in:

Options:

A.  

Java

B.  

Scala

C.  

Python

D.  

All of the above

E.  

None of the above

Discussion 0
Questions 21

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

Discussion 0
Questions 22

Which of the following architectural techniques is used for parallel processing?

Options:

A.  

The Superscalar Technique

B.  

Very Long Instruction Words (VLIW) Technique

C.  

The SuperVector Technique

D.  

Both A and B

E.  

Both B and C

Discussion 0
Questions 23

Bernoulli random variable is a type of:

Options:

A.  

Discrete random variable

B.  

Continuous random variable

C.  

Sometimes Discrete or sometimes Continuous random variable

D.  

Both A and B

Discussion 0
Questions 24

Spark should be used when:

Options:

A.  

Data is massive

B.  

Data is not massive

C.  

Both A and B

D.  

None of the above

Discussion 0
Questions 25

ARIMA model is:

Options:

A.  

Autoresponsive moving average

B.  

Autoregressive moving average

C.  

Autoreactive moving average

D.  

Autointeractive moving average

E.  

All of the above

Discussion 0