Data Science Mock Test 15 - Online MCQ Exam

What will be the output of the following Python code? f = None for i in range (5): with open("data.txt", "w") as f: if i > 2: break print(f.closed)

1 Mark(s)

Your Answer:

True True
False False
None None
Error Error

What is the primary role of "RapidMiner" in data science?

1 Mark(s)

Your Answer:

Data mining and analytics Data mining and analytics
Data visualization Data visualization
Machine learning Machine learning
Web scraping Web scraping

To find the average speed of a journey which is the appropriate measure of central tendency?

1 Mark(s)

Your Answer:

Mean Mean
Geometric Mean Geometric Mean
Harmonic Mean Harmonic Mean
Weighted Mean Weighted Mean
Mode Mode

In data modeling, what is the term for the process of reducing the dimensionality of data while preserving its important features?

1 Mark(s)

Your Answer:

Data Imputation Data Imputation
Data Reduction Data Reduction
Feature Engineering Feature Engineering
Data Normalization Data Normalization

Binomial probability distribution is denoted by b(x ; n, p), is defined as _______________?

1 Mark(s)

Your Answer:

{nx}px qn-x {nx}px qn-x
{nx}px(1 – P)x-n {nx}px(1 – P)x-n
nCxpnqnx nCxpnqnx
{nx}p(1 – P)x {nx}p(1 – P)x

What will be the output of the following Python code? sentence = 'horses are fast' regex = re.compile('(?P<animal>\w+) (?P<verb>\w+) (?P<adjective>\w+)') matched = re.search(regex, sentence) print(matched.groupdict())

1 Mark(s)

Your Answer:

{'animal': 'horses', 'verb': 'are', 'adjective': 'fast'}
('horses', 'are', 'fast') ('horses', 'are', 'fast')
'horses are fast' 'horses are fast'
'are' 'are'

Which of the following command allows you to update the repository?

1 Mark(s)

Your Answer:

push push
pop pop
update update
none of the mentioned none of the mentioned

The number of successes in fixed time interval follows?

1 Mark(s)

Your Answer:

Gamma distribution Gamma distribution
Binomial distribution Binomial distribution
Negative binomial dis Negative binomial dis
Possion distribution Possion distribution

In NLP, what does the term "syntax" refer to?

1 Mark(s)

Your Answer:

The meaning of words and phrases The meaning of words and phrases
The structure and rules of grammar The structure and rules of grammar
The emotional tone of a text The emotional tone of a text
The frequency of word occurrence The frequency of word occurrence

Which of the following is NOT a benefit of using generators?

1 Mark(s)

Your Answer:

Improved memory efficiency Improved memory efficiency
Faster execution than loops Faster execution than loops
Easier debugging Easier debugging
Lazy evaluation Lazy evaluation

The character Dot (that is, '.') in the default mode, matches any character other than . . . . . . . .

1 Mark(s)

Your Answer:

caret caret
ampersand ampersand
percentage symbol percentage symbol
newline newline

Set makes use of . . . . . . . . Dictionary makes use of . . . . . . . .

1 Mark(s)

Your Answer:

keys, keys keys, keys
key values, keys key values, keys
keys, key values keys, key values
key values, key values key values, key values

What does the term "data wrangling" refer to in the context of a data science capstone project?

1 Mark(s)

Your Answer:

Data exploration Data exploration
Model deployment Model deployment
Data cleaning and preparation Data cleaning and preparation
Data visualization Data visualization

What is the main role of "Alteryx" in data science?

1 Mark(s)

Your Answer:

Data preparation and analytics Data preparation and analytics
Data visualization and exploration Data visualization and exploration
Machine learning Machine learning
Web scraping Web scraping

In a binomial probability distribution it is impossible to find______________?

1 Mark(s)

Your Answer:

P(X < 0) P(X < 0)
P(X = 0) P(X = 0)
P(X > 0) P(X > 0)
p(0 ≤ X≤ n) p(0 ≤ X≤ n)

In a distributed computing environment, what is the primary role of a "Resource Manager" (ResourceManager) in the Hadoop ecosystem?

1 Mark(s)

Your Answer:

Storing metadata Storing metadata
Managing job scheduling Managing job scheduling
Storing and managing data blocks Storing and managing data blocks
Managing data visualization Managing data visualization

Behaviors in the real world are equivalent to program's:

1 Mark(s)

Your Answer:

data data
function function
module module
loop loop

What is the value stored in sys.argv[0]?

1 Mark(s)

Your Answer:

null null
you cannot access it you cannot access it
the program's name the program's name
the first argument the first argument

According to the empirical rule, approximately what percent of the data should lie within μ±σ?

1 Mark(s)

Your Answer:

75% 75%
99.7% 99.7%
90% 90%
95% 95%

What will be the output of the following Python code? >>> a={1,2,3} >>> {x*2 for x in a|{4,5}}

1 Mark(s)

Your Answer:

{2,4,6} {2,4,6}
Error, set comprehensions aren't allowed
{8, 2, 10, 4, 6} {8, 2, 10, 4, 6}
{8,10} {8,10}

Which of the following statement would create branch named as 'example'?

1 Mark(s)

Your Answer:

git checkout -b example git checkout -b example
git checkout -c example git checkout -c example
git check -b example git check -b example
none of the mentioned none of the mentioned

If the smallest observation in a data is decreased, the average which is not affected is______________?

1 Mark(s)

Your Answer:

G.M. G.M.
Median Median
Mean Mean
Harmonic mean Harmonic mean

What is the main purpose of "Apache Cassandra" in data science environments?

1 Mark(s)

Your Answer:

Distributed NoSQL database Distributed NoSQL database
Data visualization Data visualization
Web scraping Web scraping
Statistical analysis Statistical analysis

What will be the output of the following Python code? import turtle t=turtle.Pen() t.resizemode(“examveda”) t.resizemode()

1 Mark(s)

Your Answer:

user user
auto auto
nonresize nonresize
error error

What will be the output of the following Python code? i = 5 while True: if i%0O9 == 0: break print(i) i += 1

1 Mark(s)

Your Answer:

5 6 7 8 5 6 7 8
5 6 7 8 9 5 6 7 8 9
5 6 7 8 9 10 11 12 13 14 15 .... 5 6 7 8 9 10 11 12 13 14 15 ....
error error

Which of the following creates a pattern object?

1 Mark(s)

Your Answer:

re.create(str) re.create(str)
re.regex(str) re.regex(str)
re.compile(str) re.compile(str)
re.assemble(str) re.assemble(str)

What is the output of the following code: set1 = {1, 2, 3} set2 = {1, 2} print(set1.issuperset(set2))

1 Mark(s)

Your Answer:

TRUE TRUE
FALSE FALSE
Error Error
None None

Which function is called when the following Python code is executed? f = foo() format(f)

1 Mark(s)

Your Answer:

format() format()
__format__() __format__()
str() str()
__str__() __str__()

What is the primary objective of "data storytelling" in business data science?

1 Mark(s)

Your Answer:

Communicating data insights to others Communicating data insights to others
Creating randomized experiments Creating randomized experiments
Optimizing data visualization Optimizing data visualization
Calculating data storage costs Calculating data storage costs

The Mann-Whitney U test is preferred to a t-test when____________?

1 Mark(s)

Your Answer:

Sample are dependent Sample are dependent
The assumption of normality is not met The assumption of normality is not met
Sample sizes are small Sample sizes are small
Data are paired Data are paired

In machine learning, what is the term for the process of finding the optimal parameters for a model to achieve better performance?

1 Mark(s)

Your Answer:

Model Optimization Model Optimization
Model Evaluation Model Evaluation
Model Training Model Training
Model Selection Model Selection

In Python, which library is commonly used for visualizing decision trees and random forests in machine learning?

1 Mark(s)

Your Answer:

dtreeviz dtreeviz
Pandas Pandas
Seaborn Seaborn
Matplotlib Matplotlib

What ethical principle emphasizes the importance of preventing unauthorized access to data and protecting data from breaches?

1 Mark(s)

Your Answer:

Transparency Transparency
Accountability Accountability
Fairness Fairness
Security Security

What will be the output of the following Python expression if x=15 and y=12? x & y

1 Mark(s)

Your Answer:

b1101 b1101
0b1101 0b1101
12 12
1101 1101

If the third moment about mean is zero then distribution is_______________?

1 Mark(s)

Your Answer:

Mesokurtic Mesokurtic
Positively Skewed Positively Skewed
Symmetrical Symmetrical
Negatively Skewed Negatively Skewed

What is the primary purpose of the "applymap" method in Pandas?

1 Mark(s)

Your Answer:

Apply a function element-wise Apply a function element-wise
Sort a DataFrame Sort a DataFrame
Reshape data Reshape data
Group data Group data

What will be the output of the following Python code snippet? print('0xa'.isdigit())

1 Mark(s)

Your Answer:

True True
False False
None None
Error Error

What is the primary purpose of "seasonal decomposition" in time series analysis?

1 Mark(s)

Your Answer:

To identify seasonality in the data To identify seasonality in the data
To remove seasonality from the data To remove seasonality from the data
To make the data stationary To make the data stationary
To identify trends in the data To identify trends in the data

What is the concept of using AI-driven algorithms to personalize and enhance the user experience in virtual reality environments?

1 Mark(s)

Your Answer:

Customer service automation Customer service automation
Real estate analytics Real estate analytics
Healthcare resource optimization Healthcare resource optimization
VR experience optimization VR experience optimization

What is the output of the following code: my_list = [True, False, True] print(any(my_list))

1 Mark(s)

Your Answer:

TRUE TRUE
[True, False, True] [True, False, True]
FALSE FALSE
Error Error

In NLP, what does the term "named entity" typically refer to?

1 Mark(s)

Your Answer:

Specific words and phrases Specific words and phrases
Generic nouns Generic nouns
Pronouns and conjunctions Pronouns and conjunctions
Verbs and adjectives Verbs and adjectives

What is output of print(math.pow(3, 2))?

1 Mark(s)

Your Answer:

9.0 9.0
None None
9 9
None of the mentioned None of the mentioned

In Python, which escape sequence is used to represent a newline character?

1 Mark(s)

Your Answer:

\n \n
\r \r
\t \t
\s \s

What will be the output of the following Python code? x = 'abcd' for i in range(len(x)): print(i)

1 Mark(s)

Your Answer:

error error
1 2 3 4 1 2 3 4
a b c d a b c d
0 1 2 3 0 1 2 3

Which data visualization type is suitable for comparing the distribution of a single continuous variable across different categories?

1 Mark(s)

Your Answer:

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

In data science for business, what is the primary focus of "data exploration"?

1 Mark(s)

Your Answer:

Extracting data from multiple sources Extracting data from multiple sources
Analyzing data patterns Analyzing data patterns
Preparing data for analysis Preparing data for analysis
Organizing data into categories Organizing data into categories

Which Python library is commonly used for working with SQL databases and performing SQL-like operations on dataframes?

1 Mark(s)

Your Answer:

SQLalchemy SQLalchemy
SQLite SQLite
Pandas SQL Pandas SQL
Pandas Pandas

How do you get the current position within the file?

1 Mark(s)

Your Answer:

fp.seek() fp.seek()
fp.tell() fp.tell()
fp.loc fp.loc
fp.pos fp.pos

Which of the following Measure of averages is affected by extreme (very small or very largE. values in data set?

1 Mark(s)

Your Answer:

Geometric Mean Geometric Mean
Median Median
Arithmetic Mean Arithmetic Mean
Harmonic Mean Harmonic Mean
Mode Mode

Comparing the times to failure of radar transponders made by firms A, B, and C based on an airline’s sample experience with the three types of instruments one may use____________?

1 Mark(s)

Your Answer:

Kolmogorov-Smirnor test Kolmogorov-Smirnor test
Wilcoxon Rank-Sum test Wilcoxon Rank-Sum test
Spearman Rank Correlation test Spearman Rank Correlation test
Kruskal-Wallis test Kruskal-Wallis test

In data collection, what is the term for data that has not been processed or analyzed and is in its original form?

1 Mark(s)

Your Answer:

Raw Data Raw Data
Processed Data Processed Data
Analytical Data Analytical Data
Structured Data Structured Data

What will be the output of the following Python code? def f(x): for i in range(5): yield i g=f(8) print(list(g))

1 Mark(s)

Your Answer:

[0, 1, 2, 3, 4] [0, 1, 2, 3, 4]
[1, 2, 3, 4, 5, 6, 7, 8] [1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5] [1, 2, 3, 4, 5]
[0, 1, 2, 3, 4, 5, 6, 7] [0, 1, 2, 3, 4, 5, 6, 7]

What is the term for the process of converting data into a structured format suitable for analysis and storage?

1 Mark(s)

Your Answer:

Data Integration Data Integration
Data Transformation Data Transformation
Data Wrangling Data Wrangling
Data Cleaning Data Cleaning

Which of the following is used to extract data from HTML code of websites?

1 Mark(s)

Your Answer:

Webscraping Webscraping
Webdredging Webdredging
Webcleaning Webcleaning
All of the mentioned All of the mentioned

Single number which shows ___________ changes in a phenomenon is called an Index Number?

1 Mark(s)

Your Answer:

Overall Overall
Same Same
Variation Variation
Capable Capable

What is the term for the technology that uses quantum bits or qubits to perform calculations that classical computers cannot achieve?

1 Mark(s)

Your Answer:

AI ethics AI ethics
Data governance Data governance
Quantum computing Quantum computing
Augmented reality (AR) Augmented reality (AR)

What will be the output of the following Python code snippet? print('abc'.islower())

1 Mark(s)

Your Answer:

True True
False False
None None
Error Error

What is the result of 'True and False' ?

1 Mark(s)

Your Answer:

True True
False False
None None
Error Error

How can you specify a range of characters in a character class in regular expressions?

1 Mark(s)

Your Answer:

By using a hyphen - between the characters
By using a comma , between the characters
By using a colon : between the characters
By using a tilde ~ between the characters

5C5 is equal to ________________?

1 Mark(s)

Your Answer:

5 5
5×5 5×5
1 1
None of these None of these

Which of the following is finally produced by Hierarchical Clustering?

1 Mark(s)

Your Answer:

final estimate of cluster centroids final estimate of cluster centroids
tree showing how close things are to each other
assignment of each point to clusters assignment of each point to clusters
all of the mentioned all of the mentioned

An Index number which measure the change of a _____ is called Aggregative 1. No?

1 Mark(s)

Your Answer:

Industrial activity Industrial activity
Retail price Retail price
Cost of living Cost of living
Goods consumed Goods consumed

In Python, how can you check if a set is a subset of another set?

1 Mark(s)

Your Answer:

issubset() issubset()
subsetof() subsetof()
sub() sub()
checksubset() checksubset()

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

Fisher’s ideal index number is also obtained by _______________?

1 Mark(s)

Your Answer:

Taking A.M. of Laspeyre’s and Paasche’s index
Taking G.M. of Laspeyre’s and Paasche’s index
Both (a) and (b) Both (a) and (b)
None of these None of these

Which of the following is a type of structured data that is organized in rows and columns, similar to a spreadsheet?

1 Mark(s)

Your Answer:

CSV CSV
JSON JSON
XML XML
Unstructured Text Data Unstructured Text Data

What is the primary difference between a data science capstone project and a typical coursework assignment?

1 Mark(s)

Your Answer:

Real-world application Real-world application
Same level of complexity as assignments Same level of complexity as assignments
No mentor or advisor required No mentor or advisor required
No documentation required No documentation required

Founder of statistics is_________?

1 Mark(s)

Your Answer:

R A Fisher R A Fisher
Smith Smith
Karl pearson Karl pearson
Neyman Neyman

What will be the output of the following Python code? count={} count[(1,2,4)] = 5 count[(4,2,1)] = 7 count[(1,2)] = 6 count[(4,2,1)] = 2 tot = 0 for i in count: tot=tot+count[i] print(len(count)+tot)

1 Mark(s)

Your Answer:

25 25
17 17
16 16
Tuples can't be made keys of a dictionary

In time series analysis, what does the term "exponential smoothing" refer to?

1 Mark(s)

Your Answer:

A method for detecting seasonality A method for detecting seasonality
A method for removing outliers A method for removing outliers
A method for trend identification A method for trend identification
A method for forecasting future values A method for forecasting future values

What does the len() function do when applied to a set or tuple?

1 Mark(s)

Your Answer:

Returns the number of elements in the set or tuple
Converts the set or tuple to lowercase Converts the set or tuple to lowercase
Converts the set or tuple to uppercase Converts the set or tuple to uppercase
Removes the last element Removes the last element

How can you determine the path of the currently executing script in Python?

1 Mark(s)

Your Answer:

By using the os.path module By using the os.path module
By using the current_path() function By using the current_path() function
By using the script_path variable By using the script_path variable
By using the get_path() method By using the get_path() method

What is the output of the following code: my_list = [3, 1, 4, 1] print(sorted(my_list))

1 Mark(s)

Your Answer:

[1, 1, 3, 4] [1, 1, 3, 4]
[3, 1, 4, 1] [3, 1, 4, 1]
[4, 3, 1, 1] [4, 3, 1, 1]
[1, 3, 1, 4] [1, 3, 1, 4]

Which data visualization library in Python is known for its capability to create static, animated, and interactive visualizations?

1 Mark(s)

Your Answer:

Plotly Plotly
Seaborn Seaborn
Matplotlib Matplotlib
Pandas Pandas

What will be the output of the following Python expression? ~100?

1 Mark(s)

Your Answer:

101 101
-101 -101
100 100
-100 -100

What will be the output of the following Python code? a = ('check',) n = 2 for i in range(int(n)): a = (a,) print(a)

1 Mark(s)

Your Answer:

Error, tuples are immutable Error, tuples are immutable
(('check',),) ((('check',),),) (('check',),) ((('check',),),)
((‘check’,)’check’,) ((‘check’,)’check’,)
(('check',)’check’,) ((('check',)’check’,)’check’,)

What will be the output of the following Python expression if x=456? print("%-06d"%x)

1 Mark(s)

Your Answer:

000456 000456
456000 456000
456 456
error error

The special character B matches the empty string, but only when it is . . . . . . . .

1 Mark(s)

Your Answer:

at the beginning or end of a word at the beginning or end of a word
not at the beginning or end of a word not at the beginning or end of a word
at the beginning of the word at the beginning of the word
at the end of the word at the end of the word

What is the term for the process of using machine learning to analyze and interpret complex biological data, such as DNA sequences?

1 Mark(s)

Your Answer:

Digital twin technology Digital twin technology
Supply Chain Analytics Supply Chain Analytics
Bioinformatics Bioinformatics
Affective computing Affective computing

In Data Science, what is the purpose of feature engineering?

1 Mark(s)

Your Answer:

To extract features from data To extract features from data
To visualize data features To visualize data features
To clean data features To clean data features
To model data features To model data features

Evaluating Your Answers

Data Science Mock Test 15 : Question 1 of 80