Data Science Mock Test 18 - Online MCQ Exam

All Index numbers are not suitable for all _________________?

1 Mark(s)

Your Answer:

Kind Kind
Chain relative Chain relative
Purpose Purpose
Price Price

We must arrange the data before calculating _________?

1 Mark(s)

Your Answer:

Mean Mean
Median Median
Mode Mode
G.M. G.M.

The sum of squared deviation is least from_________________?

1 Mark(s)

Your Answer:

Median Median
Mean Mean
Mode Mode
Standard Deviation Standard Deviation

Which NLP technique involves analyzing and extracting structured information from documents and web pages?

1 Mark(s)

Your Answer:

Named Entity Recognition Named Entity Recognition
Information Extraction Information Extraction
Text Classification Text Classification
Dependency Parsing Dependency Parsing

What is the result of (2 + 3) * (5 - 1) ?

1 Mark(s)

Your Answer:

14 14
20 20
16 16
18 18

Is the following Python code valid? a={3,4,{7,5}} print(a[2][0])

1 Mark(s)

Your Answer:

Yes, 7 is printed Yes, 7 is printed
Error, elements of a set can't be printed
Error, subsets aren't allowed Error, subsets aren't allowed
Yes, {7,5} is printed Yes, {7,5} is printed

Which of the following precedence order is correct in Python?

1 Mark(s)

Your Answer:

Parentheses, Exponential, Multiplication, Division, Addition, Subtraction
Multiplication, Division, Addition, Subtraction, Parentheses, Exponential
Division, Multiplication, Addition, Subtraction, Parentheses, Exponential
Exponential, Parentheses, Multiplication, Division, Addition, Subtraction

The advantage of using a model-based approach is that is more closely tied to the model performance.

1 Mark(s)

Your Answer:

True True
False False

What is the purpose of the @staticmethod decorator in Python classes?

1 Mark(s)

Your Answer:

It defines a method that belongs to the class rather than an instance
It defines a static attribute It defines a static attribute
It defines a global function It defines a global function
It defines a constructor It defines a constructor

Which emerging trend in data science focuses on the application of AI and data analytics to improve mental health diagnosis and treatment?

1 Mark(s)

Your Answer:

Industrial process optimization Industrial process optimization
Logistics optimization Logistics optimization
Mental health AI Mental health AI
Predictive maintenance Predictive maintenance

Which method is used to remove an element from a set?

1 Mark(s)

Your Answer:

set.remove() set.remove()
set.pop() set.pop()
set.delete() set.delete()
set.discard() set.discard()

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

What is the primary purpose of the "clip" method in Pandas when working with numerical data?

1 Mark(s)

Your Answer:

Grouping and aggregating data Grouping and aggregating data
Sorting data Sorting data
Filtering data Filtering data
Clip values outside a specified range Clip values outside a specified range

An index number is used______________?

1 Mark(s)

Your Answer:

To measure changes in quantity To measure changes in quantity
To measure changes in price To measure changes in price
To measure changes in a variable over time
To measure changes in demand To measure changes in demand

What is the result of 10 - 3 + 2 ?

1 Mark(s)

Your Answer:

5 5
9 9
-9 -9
-1 -1

What is the main advantage of using polymorphism in object-oriented programming?

1 Mark(s)

Your Answer:

It allows objects of different classes to be treated uniformly
It simplifies syntax It simplifies syntax
It reduces code size It reduces code size
It makes code run faster It makes code run faster

What will be the output of the following Python function? def f(p, q): return p%q f(0, 2) f(2, 0)

1 Mark(s)

Your Answer:

0 0 0 0
Zero Division Error Zero Division Error Zero Division Error Zero Division Error
0 Zero Division Error 0 Zero Division Error
Zero Division Error 0 Zero Division Error 0

The shape of normal curve depends upon ?

1 Mark(s)

Your Answer:

None None
Mean Mean
Quartile Quartile
Standard Deviation Standard Deviation
Mean Deviation Mean Deviation

What will be the output of the following Python code, if the sys module has already been imported? sys.stdout.write("hello world")

1 Mark(s)

Your Answer:

helloworld helloworld
hello world10 hello world10
hello world11 hello world11
error error

What is the return type of function id?

1 Mark(s)

Your Answer:

int int
float float
bool bool
dict dict

What is the primary benefit of using "dashboards" in data reporting?

1 Mark(s)

Your Answer:

Consolidating multiple visuals Consolidating multiple visuals
Adding decorative elements Adding decorative elements
Making charts more complex Making charts more complex
Slowing down data analysis Slowing down data analysis

What will be the output of the following Python code? '{a}, {0}, {abc}'.format(10, a=2.5, abc=[1, 2])

1 Mark(s)

Your Answer:

Error Error
'2.5, 10, [1, 2]' '2.5, 10, [1, 2]'
2.5, 10, 1, 2 2.5, 10, 1, 2
'10, 2.5, [1, 2]' '10, 2.5, [1, 2]'

tidyr is a reframing of . . . . . . . . designed to accompany the tidy data framework.

1 Mark(s)

Your Answer:

reshape5 reshape5
dplyr dplyr
reshape2 reshape2
all of the mentioned all of the mentioned

What is the result of 2 ** 3 % 3 ?

1 Mark(s)

Your Answer:

2 2
0 0
1 1
3 3

The distribution function F(X) is represent by_______________?

1 Mark(s)

Your Answer:

P(X=x) P(X=x)
P(X P(X
P(X>x) P(X>x)
P(X≤x) P(X≤x)

Which of these is the definition for packages in Python?

1 Mark(s)

Your Answer:

A set of main modules A set of main modules
A folder of python modules A folder of python modules
A number of files containing Python definitions and statements
A set of programs making use of Python modules

Which of the statements about dictionary values if false?

1 Mark(s)

Your Answer:

More than one key can have the same value
The values of the dictionary can be accessed as dict[key]
Values of a dictionary must be unique Values of a dictionary must be unique
Values of a dictionary can be a mixture of letters and numbers

The expression 2**2**3 is evaluates as: (2**2)**3.

1 Mark(s)

Your Answer:

True True
False False

What is the Selenium library used for in web scraping?

1 Mark(s)

Your Answer:

Handling HTTP requests Handling HTTP requests
Creating APIs Creating APIs
Scraping static websites Scraping static websites
Automating browser actions Automating browser actions

The Spearman Rank-Correlation test requires that the______________?

1 Mark(s)

Your Answer:

Data must be measured on the same scale Data must be measured on the same scale
Data should be of ordinal scale at least
Data must be distribution at least approximately as a t-distribution
Data must be from two independent samples

How do you bind an event to a widget in Tkinter?

1 Mark(s)

Your Answer:

bind(event, function) bind(event, function)
event.bind(widget, function) event.bind(widget, function)
widget.bind(event, function) widget.bind(event, function)
widget(event, function) widget(event, function)

Which EDA technique is commonly used to visualize the relationship between two continuous variables through a 2D plot?

1 Mark(s)

Your Answer:

Scatter Plot Scatter Plot
Box Plot Box Plot
Histogram Histogram
Bar Chart Bar Chart

What is the purpose of a correlation matrix in EDA?

1 Mark(s)

Your Answer:

To visualize the distribution of data To visualize the distribution of data
To display relationships between variables
To identify missing values To identify missing values
To calculate summary statistics To calculate summary statistics

Is the following Python code correct? >>> class A: def __init__(self,b): self.b=b def display(self): print(self.b) >>> obj=A("Hello") >>> del obj

1 Mark(s)

Your Answer:

True True
False False

The process of systematic arrangement of data into rows and columns is called _________?

1 Mark(s)

Your Answer:

Bar chart Bar chart
Classification Classification
Tabulation Tabulation
None of these None of these

To which of the following the "in" operator can be used to check if an item is in it?

1 Mark(s)

Your Answer:

Lists Lists
Dictionary Dictionary
Set Set
All of the mentioned All of the mentioned

What will be the output of the following Python code? >>>my_tuple = (1, 2, 3, 4) >>>my_tuple.append( (5, 6, 7) ) >>>print len(my_tuple)

1 Mark(s)

Your Answer:

1 1
2 2
5 5
Error Error

The median of F,K,E, Q, U, E, N, C,Y, is ________?

1 Mark(s)

Your Answer:

EUP EUP
LEY LEY
EUQ EUQ
EFP EFP

Which of these is not true about recursion?

1 Mark(s)

Your Answer:

Making the code look clean Making the code look clean
A complex task can be broken into sub-problems
Recursive calls take up less memory Recursive calls take up less memory
Sequence generation is easier than a nested iteration

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

What is the primary goal of a density plot in EDA?

1 Mark(s)

Your Answer:

To visualize the distribution of data To visualize the distribution of data
To display relationships between variables
To identify missing values To identify missing values
To calculate summary statistics To calculate summary statistics

What is a common method to store scraped data?

1 Mark(s)

Your Answer:

Printing data to the console Printing data to the console
Sending data via email Sending data via email
Storing data in CSV or JSON files Storing data in CSV or JSON files
Uploading data to social media Uploading data to social media

What will be the output of the following Python code? x = (i for i in range(3)) for i in x: print(i)

1 Mark(s)

Your Answer:

0 1 2 0 1 2
error error
0 1 2 0 1 2 0 1 2 0 1 2
none of the mentioned none of the mentioned

What is the primary goal of Information Retrieval in NLP?

1 Mark(s)

Your Answer:

To recognize and classify named entities (e.g., names, locations)
To identify the sentiment of a text To identify the sentiment of a text
To retrieve relevant documents based on user queries
To perform tokenization To perform tokenization

What tool is commonly used for distributed data processing and large-scale data analysis in data science?

1 Mark(s)

Your Answer:

Apache Hadoop Apache Hadoop
Jupyter Notebook Jupyter Notebook
Git Git
MySQL MySQL

A listing of the possible outcomes of an experiment and their corresponding probability is called:______________?

1 Mark(s)

Your Answer:

Random Variable Random Variable
Contingency table Contingency table
Bayesian table Bayesian table
Probability distribution Probability distribution
Frequency distribution Frequency distribution

What will be the output shape of the following Python code? import turtle t=turtle.Pen() for i in range(1,4): t.forward(60) t.left(90)

1 Mark(s)

Your Answer:

Rectangle Rectangle
Trapezium Trapezium
Triangle Triangle
Square Square

In data science, what is the term for using historical data to understand patterns and make informed decisions in business?

1 Mark(s)

Your Answer:

Descriptive Analytics Descriptive Analytics
Predictive Analytics Predictive Analytics
Prescriptive Analytics Prescriptive Analytics
Diagnostic Analytics Diagnostic Analytics

An Index number of an average quality of wheat in Lahore__________ Index?

1 Mark(s)

Your Answer:

Volume Index Number Volume Index Number
value Index Number value Index Number
Quantity Index Number Quantity Index Number
Weighted Index Number Weighted Index Number

How do you change the file position to an offset value from the start?

1 Mark(s)

Your Answer:

fp.seek(offset, 0) fp.seek(offset, 0)
fp.seek(offset, 1) fp.seek(offset, 1)
fp.seek(offset, 2) fp.seek(offset, 2)
none of the mentioned none of the mentioned

Which technology is commonly used for distributed data processing and can handle both batch and stream data processing?

1 Mark(s)

Your Answer:

Apache Kafka Apache Kafka
Apache HBase Apache HBase
Apache Spark Apache Spark
Apache Hive Apache Hive

What is the primary goal of data anonymization in data ethics?

1 Mark(s)

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 reduce computational complexity To reduce computational complexity

Which data collection method involves selecting a sample from a larger population and collecting data from the sample only?

1 Mark(s)

Your Answer:

Experiments Experiments
Observational Studies Observational Studies
Surveys Surveys
Sampling Sampling

The most frequent value in data is called ________________?

1 Mark(s)

Your Answer:

Mean Mean
Mode Mode
Median Median
H.M. H.M.

The output of the function len(sys.argv) is . . . . . . . .

1 Mark(s)

Your Answer:

Error Error
1 1
0 0
Junk value Junk value

In the context of data ethics, what does "data anonymization" refer to?

1 Mark(s)

Your Answer:

Creating data backups Creating data backups
Sharing data publicly Sharing data publicly
Adding personal identifiers to data Adding personal identifiers to data
Removing or altering personal identifiers from data to protect privacy

Why is it important to consider "ethics" and "bias" when working on a data science capstone project?

1 Mark(s)

Your Answer:

Ensure fair and responsible outcomes Ensure fair and responsible outcomes
Add complexity to the project Add complexity to the project
Replace data exploration Replace data exploration
Choose the mentor Choose the mentor

What is the primary goal of Machine Translation in NLP?

1 Mark(s)

Your Answer:

To recognize and classify named entities (e.g., names, locations)
To identify the sentiment of a text To identify the sentiment of a text
To perform tokenization To perform tokenization
To translate text from one language to another

What will be the output of the following Python code? def example(L): ''' (list) -> list ''' i = 0 result = [] while i

1 Mark(s)

Your Answer:

Return a list containing every third item from L starting at index 0
Return an empty list Return an empty list
Return a list containing every third index from L starting at index 0
Return a list containing the items from L starting from index 0, omitting every third item

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Data Science Mock Test 18 : Question 1 of 59