Data Science Mock Test 16 - Online MCQ Exam

Founder of statistics is_________?

1 Mark(s)

Your Answer:

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

How can you match zero or more occurrences of a pattern in regular expressions?

1 Mark(s)

Your Answer:

By using the * symbol after the pattern By using the * symbol after the pattern
By using the ? symbol after the pattern By using the ? symbol after the pattern
By using the + symbol after the pattern By using the + symbol after the pattern
By using the # symbol after the pattern By using the # symbol after the pattern

In time series analysis, what is the primary goal of "white noise testing"?

1 Mark(s)

Your Answer:

To identify seasonality in the data To identify seasonality in the data
To test for independence in the residuals
To remove outliers from the data To remove outliers from the data
To evaluate the accuracy of forecasts To evaluate the accuracy of forecasts

What is a class variable in object-oriented programming?

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Your Answer:

A variable shared among all instances of a class
A variable within a method A variable within a method
A built-in variable A built-in variable
A specific data type A specific data type

In binomial experiment, the successive trials are _____________?

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Your Answer:

Dependent Dependent
independent independent
Related Related
constant constant

What is the term for a machine learning algorithm that learns from historical data to make predictions about the future?

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Your Answer:

Regression Regression
Clustering Clustering
Classification Classification
Supervised Learning Supervised Learning

What is the primary objective of "data-driven decision-making" in business analytics?

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Your Answer:

Relying solely on intuition Relying solely on intuition
Using data to inform choices Using data to inform choices
Avoiding data analysis Avoiding data analysis
Reducing data storage requirements Reducing data storage requirements

What does the return statement do in a function?

1 Mark(s)

Your Answer:

It terminates the function immediately It terminates the function immediately
It outputs a value from the function It outputs a value from the function
It defines a loop condition It defines a loop condition
It defines an if-statement condition It defines an if-statement condition

A experiment repeated number of time one by one is called _________________?

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Your Answer:

Random Random
Raw data Raw data
Introduce Introduce
Specified Specified

The grouped data is also called_____________?

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Your Answer:

Raw data Raw data
Primary data Primary data
Secondary data Secondary data
Qualitative data Qualitative data

In Pandas, which method is used to fill missing values in a DataFrame with specified values or a filling method?

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Your Answer:

melt() melt()
drop_duplicates() drop_duplicates()
dropna() dropna()
fillna() fillna()

What is the term for using machine learning algorithms to optimize decision-making processes in real-time, such as in autonomous vehicles?

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Your Answer:

Data governance Data governance
Reinforcement learning Reinforcement learning
Quantum computing Quantum computing
None of the above None of the above

What will be the output of the following Python code? lst = [1, 2, 3] lst[3]

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Your Answer:

NameError NameError
ValueError ValueError
IndexError IndexError
TypeError TypeError

Continuous variable can assume __________ value?

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Your Answer:

All possible All possible
Constant Constant
Accuracy Accuracy
Specific Specific

In time series analysis, what is the purpose of "rolling forecasting origin"?

1 Mark(s)

Your Answer:

To identify seasonality in the data To identify seasonality in the data
To evaluate the accuracy of forecasts To evaluate the accuracy of forecasts
To remove outliers from the data To remove outliers from the data
To test for autocorrelation in residuals

In moderately skewed distribution if _________________?

1 Mark(s)

Your Answer:

Mode = 3 median – 2 mean Mode = 3 median – 2 mean
Mode = 2 median -3 mean Mode = 2 median -3 mean
Median = 2 median-3 mean Median = 2 median-3 mean
Mean- mode Mean- mode

In Normal distribution, the parameter which controls the flatness of the curve is____________?

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Your Answer:

µ,σ µ,σ
None None
µ, MD µ, MD
2∏—√,e 2∏—√,e

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

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Your Answer:

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

Lines, rectangles and circles are:

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Your Answer:

hardware objects hardware objects
graphic objects graphic objects
control system objects control system objects
circuit designing objects circuit designing objects

Which emerging trend in data science focuses on the ethical and responsible use of data and algorithms?

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Your Answer:

AI ethics AI ethics
Data governance Data governance
Deep learning Deep learning
Blockchain Blockchain

What is the term for the process of handling missing data in a dataset by estimating values based on available data?

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Your Answer:

Data Imputation Data Imputation
Data Normalization Data Normalization
Data Transformation Data Transformation
Data Encoding Data Encoding

What is the result of not (3 > 5) ?

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Your Answer:

True True
False False
None None
Error Error

What will be the output of the following Python code? t=32.00 [round((x-32)*5/9) for x in t]

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Your Answer:

[0] [0]
0 0
[0.00] [0.00]
Error Error

What is the output of the following code: class Parent: def show(self): print('Parent method') class Child(Parent): pass obj = Child() obj.show()

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Your Answer:

Parent method Parent method
An error will occur An error will occur
Child method Child method
obj obj

What is the output of the following code: my_dict = {'a': 1, 'b': 2, 'c': 3} print(my_dict.get('d', 0))

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Your Answer:

0 0
'd' 'd'
3 3
'a' 'a'

How do you create a message box for displaying alerts in Tkinter?

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Your Answer:

dialog_box.show_alert() dialog_box.show_alert()
messagebox.alert() messagebox.alert()
message_box.show() message_box.show()
tkMessageBox.showinfo() tkMessageBox.showinfo()

In file handling, what does this terms means "r, a"?

1 Mark(s)

Your Answer:

read, append read, append
append, read append, read
write, append write, append
none of the mentioned none of the mentioned

What will be the output of the following Python expression? 0x35 | 0x75

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Your Answer:

115 115
116 116
117 117
118 118

Which technology aims to create realistic computer-generated experiences that are indistinguishable from the real world?

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Your Answer:

Smart building technology Smart building technology
Environmental data science Environmental data science
Cognitive computing Cognitive computing
Virtual reality (VR) Virtual reality (VR)

Which of the following is a correct way to define a decorator function in Python?

1 Mark(s)

Your Answer:

def my_decorator(func): def wrapper(): def my_decorator(func): def wrapper():
def wrapper(): def my_decorator(func): def wrapper(): def my_decorator(func):
def decorator(): def func_wrapper(): def decorator(): def func_wrapper():
def func_wrapper(): def decorator(func):

What will be the output of the following Python code? s='{0}, {1}, and {2}' s.format('hello', 'good', 'morning')

1 Mark(s)

Your Answer:

'hello good and morning' 'hello good and morning'
'hello, good, morning' 'hello, good, morning'
'hello, good, and morning' 'hello, good, and morning'
Error Error

What will be the output of the following Python code snippet? >>> import collections >>> a=collections.Counter([3,3,4,5]) >>> b=collections.Counter([3,4,4,5,5,5]) >>> a&b

1 Mark(s)

Your Answer:

Counter({3: 12, 4: 1, 5: 1}) Counter({3: 12, 4: 1, 5: 1})
Counter({3: 1, 4: 1, 5: 1}) Counter({3: 1, 4: 1, 5: 1})
Counter({4: 2}) Counter({4: 2})
Counter({5: 1}) Counter({5: 1})

The sum of absolute deviations from median is _____?

1 Mark(s)

Your Answer:

Zero Zero
Positive Positive
Least Least
None of these None of these

Study the following program: d = {0, 1, 2} for x in d: print(x) What will be the output of this statement? ``` d = {0, 1, 2} for x in d: print(x) ```

1 Mark(s)

Your Answer:

{0, 1, 2} {0, 1, 2} {0, 1, 2} {0, 1, 2} {0, 1, 2} {0, 1, 2}
0 1 2 0 1 2
Syntax_Error Syntax_Error
None of these above None of these above

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

1 Mark(s)

Your Answer:

It hides complex implementation details and focuses on the essential features
It reduces code size It reduces code size
It makes code run faster It makes code run faster
It simplifies syntax It simplifies syntax

How can you avoid being blocked while web scraping?

1 Mark(s)

Your Answer:

By scraping large amounts of data quickly
By using multiple IP addresses By using multiple IP addresses
By ignoring the robots.txt file By ignoring the robots.txt file
By scraping data from a single website By scraping data from a single website

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

Binomial distribution is positively skewed when ______________?

1 Mark(s)

Your Answer:

p > q p > q
P = q P = q
p < q p < q
P/q P/q

The degree to which numerical data tend to spread about an average value is a________________?

1 Mark(s)

Your Answer:

Range Range
variance variance
Minimum Minimum
Dispersion Dispersion

How do you get the current position within the file?

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Your Answer:

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

In data science, what is the term for the process of converting text data into numerical form while preserving semantic meaning?

1 Mark(s)

Your Answer:

Data aggregation Data aggregation
Data normalization Data normalization
Word embedding Word embedding
Data imputation Data imputation

How many except statements can a try-except block have?

1 Mark(s)

Your Answer:

zero zero
one one
more than one more than one
more than zero more than zero

Which evaluation metric is typically used for regression models and measures the average squared difference between predicted and actual values?

1 Mark(s)

Your Answer:

Accuracy Accuracy
Mean Absolute Error (MAE) Mean Absolute Error (MAE)
Root Mean Square Error (RMSE) Root Mean Square Error (RMSE)
F1 Score F1 Score

What does ~~~~~~5 evaluate to?

1 Mark(s)

Your Answer:

+5 +5
-11 -11
+11 +11
-5 -5

What will be the output of the following Python code? a={1:"A",2:"B",3:"C"} for i in a: print(i,end=" ")

1 Mark(s)

Your Answer:

1 2 3 1 2 3
A' 'B' 'C' A' 'B' 'C'
1 'A' 2 'B' 3 'C' 1 'A' 2 'B' 3 'C'
Error, it should be: for i in a.items():

What does encapsulation refer to in object-oriented programming?

1 Mark(s)

Your Answer:

It defines a new class It defines a new class
It creates abstract objects It creates abstract objects
It hides complex implementation details and only exposes essential features
It abstracts the data It abstracts the data

if f(x1,x2,…xn;θ)=g(θˆ;θ)h(x1,x2,….,xn), then θˆ is____________?

1 Mark(s)

Your Answer:

Consistent Consistent
Sufficient Sufficient
Efficient Efficient
Unbiased Unbiased

What does os.link() do?

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Your Answer:

create a symbolic link create a symbolic link
create a hard link create a hard link
create a soft link create a soft link
none of the mentioned none of the mentioned

Which of the following is true about the finally clause in exception handling?

1 Mark(s)

Your Answer:

The code in the finally block always executes, regardless of whether an exception is raised or not
The finally block should always come before the try block
The finally block is optional The finally block is optional
The code in the finally block executes only if an exception is caught

What is the primary goal of "data annotation" in data visualization?

1 Mark(s)

Your Answer:

Add context to the chart Add context to the chart
Make the chart more colorful Make the chart more colorful
Add chartjunk Add chartjunk
Slow down data analysis Slow down data analysis

In a line chart, what does the x-axis typically represent?

1 Mark(s)

Your Answer:

Categories or time intervals Categories or time intervals
Numeric values Numeric values
Frequency of data points Frequency of data points
Color encoding Color encoding

How is a generator different from a regular function?

1 Mark(s)

Your Answer:

A generator uses the return keyword A generator uses the return keyword
A generator can yield multiple values A generator can yield multiple values
A generator uses the break statement A generator uses the break statement
A generator uses the continue statement A generator uses the continue statement

Which Python library is commonly used for creating interactive data dashboards and web applications for data visualization?

1 Mark(s)

Your Answer:

Pandas Pandas
Seaborn Seaborn
Dash Dash
Bokeh Bokeh

Each observation forms a column in tidy data.

1 Mark(s)

Your Answer:

True True
False False

In a normal distribution E(X-µ)2 is________________?

1 Mark(s)

Your Answer:

Variance Variance
Mean Deviation Mean Deviation
Standard Deviation Standard Deviation
Quartile Deviation Quartile Deviation

Which NLP task involves converting text from one language to another while preserving its meaning and context?

1 Mark(s)

Your Answer:

Named Entity Recognition Named Entity Recognition
Sentiment Analysis Sentiment Analysis
Part-of-Speech Tagging Part-of-Speech Tagging
Machine Translation Machine Translation

What will be the output of the following Python code? a={1:"A",2:"B",3:"C"} a.clear() print(a)

1 Mark(s)

Your Answer:

None None
{ None:None, None:None, None:None} { None:None, None:None, None:None}
{1:None, 2:None, 3:None} {1:None, 2:None, 3:None}
{ } { }

What will be the output of the following Python code snippet? a = {} a[1] = 1 a['1'] = 2 a[1.0]=4 count = 0 for i in a: count += a[i] print(count)

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Your Answer:

An exception is thrown An exception is thrown
3 3
6 6
2 2

What is an ORM (Object-Relational Mapping) in database connectivity?

1 Mark(s)

Your Answer:

A way to create images from databases A way to create images from databases
A programming language for databases A programming language for databases
A technique to map database tables to object-oriented classes
A tool for compressing database files A tool for compressing database files

Which of the following is not a step in data analysis?

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Your Answer:

Obtain the data Obtain the data
Clean the data Clean the data
EDA EDA
None of the mentioned None of the mentioned

What will be the output of the following Python code? print("abcdef".find("cd") == "cd" in "abcdef")

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Your Answer:

True True
False False
Error Error
None of the mentioned None of the mentioned

In EDA, what does the term "box" represent in a box plot?

1 Mark(s)

Your Answer:

Median Median
Mode Mode
Range Range
Standard Deviation Standard Deviation

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

Which method is used to get a list of all values in a dictionary?

1 Mark(s)

Your Answer:

values() values()
get_values() get_values()
all_values() all_values()
list_values() list_values()

In distributed computing, what is the primary advantage of using a "Reducer" in the MapReduce programming model?

1 Mark(s)

Your Answer:

To split data into smaller chunks To split data into smaller chunks
To process and aggregate data from Mapper tasks
To store data in the HDFS To store data in the HDFS
To visualize data relationships To visualize data relationships

What statistical technique is used to estimate a population parameter by repeatedly sampling from the population?

1 Mark(s)

Your Answer:

Exploratory data analysis Exploratory data analysis
Bootstrap resampling Bootstrap resampling
Data preprocessing Data preprocessing
None of the above None of the above

What will be the output of the following code: for i in range(5, 0, -1): print(i)

1 Mark(s)

Your Answer:

0 4 3 2 1 0 4 3 2 1
5 4 3 2 1 5 4 3 2 1
1 2 3 4 5 1 2 3 4 5
4 3 2 1 0 4 3 2 1 0

In model evaluation, what is the primary goal of cross-entropy loss or log loss?

1 Mark(s)

Your Answer:

To maximize the margin between classes To maximize the margin between classes
To minimize prediction errors To minimize prediction errors
To measure the model's prediction accuracy
To reduce the dimensionality of the dataset

A continuous random variable which can assume all possible values on scale in a given _______________?

1 Mark(s)

Your Answer:

Interval Interval
Point Point
Time Time
Sample space Sample space

Study the following program: x = 1 while True: if x % 5 = = 0: break print(x) x + = 1 What will be the output of this code? ``` x = 1 while True: if x % 5 = = 0: break print(x) x + = 1 ```

1 Mark(s)

Your Answer:

error error
2 1 2 1
0 3 1 0 3 1
None of these None of these

What happens if no arguments are passed to the seek function?

1 Mark(s)

Your Answer:

file position is set to the start of file
file position is set to the end of file file position is set to the end of file
file position remains unchanged file position remains unchanged
error error

Causal analysis is commonly applied to census data.

1 Mark(s)

Your Answer:

True True
False False

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

Which machine learning algorithm is commonly used for time series forecasting and trend analysis?

1 Mark(s)

Your Answer:

K-Nearest Neighbors (KNN) K-Nearest Neighbors (KNN)
Decision Tree Decision Tree
Linear Regression Linear Regression
Long Short-Term Memory (LSTM) Long Short-Term Memory (LSTM)

Which of the following operations are supported on Time Frames?

1 Mark(s)

Your Answer:

idxmax idxmax
ixmax ixmax
ixmin ixmin
none of the mentioned none of the mentioned

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Data Science Mock Test 16 : Question 1 of 75