Data Science Mock Test 2 - Online MCQ Exam

Which emerging trend in data science focuses on the use of AI and data analytics to enhance the personalization of online education?

1 Mark(s)

Your Answer:

Logistics optimization Logistics optimization
Inclusive design Inclusive design
Predictive maintenance Predictive maintenance
EdTech EdTech

How do you create a custom decorator in Python?

1 Mark(s)

Your Answer:

By modifying the built-in decorators By modifying the built-in decorators
By using the @custom_decorator syntax By using the @custom_decorator syntax
By importing decorators from external libraries
By defining a function and using the @ symbol

What will be the output of the following Python code? '{0:f}, {1:2f}, {2:05.2f}'.format(1.23456, 1.23456, 1.23456)

1 Mark(s)

Your Answer:

Error Error
'1.234560, 1.22345, 1.23' '1.234560, 1.22345, 1.23'
No output No output
'1.234560, 1.234560, 01.23' '1.234560, 1.234560, 01.23'

Which NLP task involves determining the structure and relationships between words in a sentence or document?

1 Mark(s)

Your Answer:

Named Entity Recognition Named Entity Recognition
Sentiment Analysis Sentiment Analysis
Dependency Parsing Dependency Parsing
Text Classification Text Classification

What is the primary purpose of the "Kolmogorov-Smirnov test" in statistics?

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Your Answer:

Visualizing data Visualizing data
Feature selection Feature selection
Assessing the goodness of fit of a sample distribution to a theoretical distribution
Clustering Clustering

If we reject the null hypothesis, we might be making____________?

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Your Answer:

Unpredictable Unpredictable
A correct Decision A correct Decision
Type-II Error Type-II Error
Type-Error Type-Error

What will be the output of the following Python function? list(enumerate([2, 3]))

1 Mark(s)

Your Answer:

Error Error
[(1, 2), (2, 3)] [(1, 2), (2, 3)]
[(0, 2), (1, 3)] [(0, 2), (1, 3)]
[(2, 3)] [(2, 3)]

What is the primary purpose of a Bayesian Network in data modeling?

1 Mark(s)

Your Answer:

To represent the structure of a database
To predict probabilities To predict probabilities
To visualize data relationships To visualize data relationships
To calculate summary statistics To calculate summary statistics

What is the purpose of the readlines() method in file handling?

1 Mark(s)

Your Answer:

It reads all lines of a file into a list
It writes lines to the file It writes lines to the file
It appends lines to the file It appends lines to the file
It closes the file It closes the file

Which method is used to remove a key-value pair from a dictionary?

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Your Answer:

pop() pop()
remove() remove()
delete() delete()
discard() discard()

In a table, foot note and source notes are ___________________?

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Your Answer:

Same Same
Different Different
Identical Identical
Non-identical Non-identical

What is the primary goal of time series modeling in data modeling?

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Your Answer:

To predict numerical values To predict numerical values
To group similar data points To group similar data points
To improve model accuracy To improve model accuracy
To calculate summary statistics To calculate summary statistics

Which of the following is not a core data type in Python programming?

1 Mark(s)

Your Answer:

Tuples Tuples
Lists Lists
Class Class
Dictionary Dictionary

What will be the output of the following Python code? i = 1 while True: if i%0O7 == 0: break print(i) i += 1

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Your Answer:

1 2 3 4 5 6 1 2 3 4 5 6
1 2 3 4 5 6 7 1 2 3 4 5 6 7
error error
none of the mentioned none of the mentioned

What is the result of 12 // 4 / 2 ?

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Your Answer:

3.0 3.0
3 3
1.0 1.0
1 1

Quartiles, deciles are located from an ogive in a way________________?

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Your Answer:

Mode Mode
G.M. G.M.
Median Median
Quarlities Quarlities

What is the main goal of data partitioning in distributed computing?

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Your Answer:

To increase data complexity To increase data complexity
To simplify data storage and retrieval To simplify data storage and retrieval
To maximize data storage capacity To maximize data storage capacity
To distribute data across multiple nodes

What will be the output of the following Python code? >>> import collections >>> a=collections.OrderedDict((str(x),x) for x in range(3)) >>> a

1 Mark(s)

Your Answer:

{'2':2, '0':0, '1':1} {'2':2, '0':0, '1':1}
OrderedDict([('0', 0), ('1', 1), ('2', 2)])
An exception is thrown An exception is thrown
' ' ' '

A source note foot are the _______________?

1 Mark(s)

Your Answer:

Top Top
Bottom Bottom
Same Same
Different Different

What is the main goal of "data governance" in business analytics?

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Your Answer:

To increase data accessibility To increase data accessibility
To protect sensitive information To protect sensitive information
To improve data quality To improve data quality
To establish data policies and procedures

A random variable is ____________ ?

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Your Answer:

Not a function Not a function
A continuous variable A continuous variable
A function A function
None of these None of these

knitr is good for complex time-consuming computations.

1 Mark(s)

Your Answer:

True True
False False

Which of the following functions can help us to find the version of python that we are currently working on?

1 Mark(s)

Your Answer:

sys.version(1) sys.version(1)
sys.version(0) sys.version(0)
sys.version() sys.version()
sys.version sys.version

Which one of the following has the highest precedence in the expression?

1 Mark(s)

Your Answer:

Exponential Exponential
Addition Addition
Multiplication Multiplication
Parentheses Parentheses

In machine learning, what is the term for the process of reducing the dimensionality of data while preserving as much information as possible?

1 Mark(s)

Your Answer:

Data Reduction Data Reduction
Data Encoding Data Encoding
Feature Selection Feature Selection
Data Normalization Data Normalization

Which statistical method is used to determine the order of differencing in an ARIMA model?

1 Mark(s)

Your Answer:

Augmented Dickey-Fuller test Augmented Dickey-Fuller test
Seasonal Decomposition of Time Series Seasonal Decomposition of Time Series
Ljung-Box test Ljung-Box test
PACF (Partial Autocorrelation Function) PACF (Partial Autocorrelation Function)

What will be the output of the following Python function? any([2>8, 4>2, 1>2])

1 Mark(s)

Your Answer:

Error Error
True True
False False
4>2 4>2

In Python, which library provides tools for working with data in Excel files, including reading, writing, and manipulation?

1 Mark(s)

Your Answer:

Matplotlib Matplotlib
Seaborn Seaborn
Pandas Pandas
openpyxl openpyxl

Which of the following is NOT a typical deliverable in a data science capstone project?

1 Mark(s)

Your Answer:

Data cleaning report Data cleaning report
Project presentation Project presentation
Final project report Final project report
Annotated bibliography Annotated bibliography

Which of the following function is used for loading flat files?

1 Mark(s)

Your Answer:

read.data read.data
read.sheet read.sheet
read.table read.table
none of the mentioned none of the mentioned

What is encapsulation in object-oriented programming (OOP)?

1 Mark(s)

Your Answer:

Binding data and methods together Binding data and methods together
Inheriting from multiple classes Inheriting from multiple classes
Exposing internal implementation details
Restricting access to public methods Restricting access to public methods

What does the built-in function hex() do in Python?

1 Mark(s)

Your Answer:

Converts an integer to a hexadecimal string
Converts a string to lowercase Converts a string to lowercase
Returns the square of a number Returns the square of a number
Returns the absolute value of a number Returns the absolute value of a number

What will be the output of the following Python code? class A: def __init__(self, x= 1): self.x = x class der(A): def __init__(self,y = 2): super().__init__() self.y = y def main(): obj = der() print(obj.x, obj.y) main()

1 Mark(s)

Your Answer:

Error, the syntax of the invoking method is wrong
The program runs fine but nothing is printed
1 0 1 0
1 2 1 2

What will be the output of the following Python function if the random module has already been imported? random.randint(3.5,7)

1 Mark(s)

Your Answer:

Error Error
Any integer between 3.5 and 7, including 7
Any integer between 3.5 and 7, excluding 7
The integer closest to the mean of 3.5 and 7

Age of a shopkeeper is the example of___________?

1 Mark(s)

Your Answer:

Qualitative Qualitative
Quantitative data Quantitative data
Variable data Variable data
Continuous data Continuous data

Which of the following is NOT a common data preprocessing technique?

1 Mark(s)

Your Answer:

Data Encoding Data Encoding
Data Normalization Data Normalization
Data Imputation Data Imputation
Data Aggregation Data Aggregation

How does the headless browser mode in Selenium work?

1 Mark(s)

Your Answer:

It runs a browser with a visible user interface
It runs a browser without a visible user interface
It runs a browser with extra features It runs a browser with extra features
It runs a browser with a virtual environment

The ________ in the distribution around which the observation to lie?

1 Mark(s)

Your Answer:

Mean Mean
Dispersion Dispersion
Manner Manner
Central value Central value

What does the acronym "API" stand for in the context of data collection and retrieval?

1 Mark(s)

Your Answer:

Application Programming Interface Application Programming Interface
Advanced Protocol Interface Advanced Protocol Interface
Automated Process Integration Automated Process Integration
Analytical Program Interaction Analytical Program Interaction

Which ethical principle emphasizes the importance of treating individuals fairly and without discrimination in data science?

1 Mark(s)

Your Answer:

Transparency Transparency
Accountability Accountability
Fairness Fairness
Confidentiality Confidentiality

Which of the following argument is used to set importance values?

1 Mark(s)

Your Answer:

scale scale
set set
value value
all of the mentioned all of the mentioned

What will be the output of the following Python code snippet? test = {1:'A', 2:'B', 3:'C'} del test[1] test[1] = 'D' del test[2] print(len(test))

1 Mark(s)

Your Answer:

0 0
2 2
Error as the key-value pair of 1:'A' is already deleted
1 1

Which of the following methods are present in caret for regularized regression?

1 Mark(s)

Your Answer:

ridge ridge
lasso lasso
relaxo relaxo
all of the mentioned all of the mentioned

Which data integration and ETL (Extract, Transform, Load) tool is widely used for data preparation in data science projects?

1 Mark(s)

Your Answer:

Apache NiFi Apache NiFi
PySpark PySpark
Git Git
SQL SQL

What is the purpose of the built-in function dir()?

1 Mark(s)

Your Answer:

Returns a list of attributes and methods of an object
Converts a string to lowercase Converts a string to lowercase
Returns the square of a number Returns the square of a number
Returns the absolute value of a number Returns the absolute value of a number

What will be the output of the following Python code? l=[1, -2, -3, 4, 5] def f1(x): return x

1 Mark(s)

Your Answer:

[False, False, False, False, False] [False, False, False, False, False]
[False, True, True, False, False] [False, True, True, False, False]
[True, False, False, True, True] [True, False, False, True, True]
[True, True, True, True, True] [True, True, True, True, True]

The Wilcoxon, Rank-Sum test used to compares_______________?

1 Mark(s)

Your Answer:

Any number of populations Any number of populations
A sample mean to the population mean A sample mean to the population mean
Two populations Two populations
Three populations Three populations

What is the maximum possible length of an identifier?

1 Mark(s)

Your Answer:

31 characters 31 characters
63 characters 63 characters
79 characters 79 characters
none of the mentioned none of the mentioned

Which of the following is NOT a key skill required for a Data Scientist?

1 Mark(s)

Your Answer:

Data Visualization Data Visualization
Storytelling Storytelling
Database Administration Database Administration
Machine Learning Machine Learning

What will be the output of the following Python code? A = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] [A[i][i] for i in range(len(A))]

1 Mark(s)

Your Answer:

[1, 5, 9] [1, 5, 9]
[3, 5, 7] [3, 5, 7]
[4, 5, 6] [4, 5, 6]
[2, 5, 8] [2, 5, 8]

In data science, what does the term "outlier" refer to?

1 Mark(s)

Your Answer:

A data point with a zero value A data point with a zero value
An unusually extreme data point that deviates from the overall pattern
A data point with a high mean A data point with a high mean
None of the above None of the above

Study the following statement: >>>"a"+"bc" What will be the output of this statement? ``` >>>"a"+"bc" ```

1 Mark(s)

Your Answer:

a+bc a+bc
abc abc
a bc a bc
a a

What will be the output of the following Python code snippet? d1 = {"john":40, "peter":45} d2 = {"john":466, "peter":45} d1 == d2

1 Mark(s)

Your Answer:

True True
False False
None None
Error Error

Which data visualization type is commonly used to display the relationship between two continuous variables with a scatterplot matrix?

1 Mark(s)

Your Answer:

Scatter plot matrix Scatter plot matrix
Bar chart Bar chart
Box plot Box plot
Line chart Line chart

If u = 5 and S.D. = 2.5 then Binomial distribution are ________________?

1 Mark(s)

Your Answer:

Unequal Unequal
Wrong Wrong
Fair Fair
None of these None of these

What is the purpose of the modulo operator (%) in Python?

1 Mark(s)

Your Answer:

Finding the exponent Finding the exponent
Multiplying numbers Multiplying numbers
Calculating the square root Calculating the square root
Calculating the remainder Calculating the remainder

Why is it important to establish "data pipelines" or "data integration" in a data science capstone project?

1 Mark(s)

Your Answer:

Simplify the project report Simplify the project report
Conduct data exploration Conduct data exploration
Automate data collection and processing Automate data collection and processing
Create more project documentation Create more project documentation

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Data Science Mock Test 2 : Question 1 of 57