Data Science Mock Test 7 - Online MCQ Exam

What is an advantage of using generators for large datasets?

1 Mark(s)

Your Answer:

They use more memory They use more memory
They are slower than loops They are slower than loops
They are easier to implement They are easier to implement
They use less memory They use less memory

What is the main purpose of "data extraction" in business analytics?

1 Mark(s)

Your Answer:

Extracting data from the environment Extracting data from the environment
Reducing data storage costs Reducing data storage costs
Predicting future market trends Predicting future market trends
Identifying data sources Identifying data sources

Which of the following functions cannot be used on heterogeneous sets?

1 Mark(s)

Your Answer:

pop pop
remove remove
update update
sum sum

G.M. are set of ‘n’ values product of the nth roots of the ______________?

1 Mark(s)

Your Answer:

Given value Given value
All +ve, -Ve value All +ve, -Ve value
Zero reject Zero reject
None of these None of these

In order to store values in terms of key and value we use what core data type.

1 Mark(s)

Your Answer:

list list
tuple tuple
class class
dictionary dictionary

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 will be the output of the following Python code? def power(x, y=2): r = 1 for i in range(y): r = r * x return r print power(3) print power(3, 3)

1 Mark(s)

Your Answer:

212 32 212 32
9 27 9 27
567 98 567 98
None of the mentioned None of the mentioned

Let A and B be objects of class Foo. Which functions are called when print(A + B) is executed?

1 Mark(s)

Your Answer:

__add__(), __str__() __add__(), __str__()
__str__(), __add__() __str__(), __add__()
__sum__(), __str__() __sum__(), __str__()
__str__(), __sum__() __str__(), __sum__()

Which statistical method is used to identify the presence of outliers or anomalies in a time series data set?

1 Mark(s)

Your Answer:

Augmented Dickey-Fuller test Augmented Dickey-Fuller test
Granger causality test Granger causality test
Box-Plot Method Box-Plot Method
t-test t-test

Analysis process which involves analyzing and designing of system from an object-oriented programming is termed as:

1 Mark(s)

Your Answer:

Object Analysis Object Analysis
Object Oriented Analysis Object Oriented Analysis
Overall Oriented Analysis Overall Oriented Analysis
System Analysis System Analysis

What will be the output of the following code: def my_function(a, b): return a / b result = my_function(4, 2) print(result)

1 Mark(s)

Your Answer:

2 2
1 1
0.5 0.5
4 4

The relation showing between whole and its components used chart is said to be ___________________?

1 Mark(s)

Your Answer:

Component bar chart Component bar chart
Multiple bar chart Multiple bar chart
Pie Chart Pie Chart
Simple Bar chart Simple Bar chart

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

Which of the following is NOT a common data format used in Data Science projects?

1 Mark(s)

Your Answer:

JSON JSON
XML XML
CSV CSV
HTML HTML

In Python, how can you get a list of all key-value pairs in a dictionary?

1 Mark(s)

Your Answer:

items() items()
get_items() get_items()
all_items() all_items()
list_items() list_items()

What ethical principle emphasizes the importance of ensuring that data practices align with societal norms and values?

1 Mark(s)

Your Answer:

Transparency Transparency
Accountability Accountability
Fairness Fairness
Social responsibility Social responsibility

The shape of the symmetrical distribution is _______?

1 Mark(s)

Your Answer:

U- Shaped U- Shaped
J- Shaped J- Shaped
Bell- Shaped Bell- Shaped
None of these None of these

What is the output of the following code: my_set = {1, 2, 3, 4, 5} my_set.pop() print(my_set)

1 Mark(s)

Your Answer:

{1, 2, 3, 4, 5} {1, 2, 3, 4, 5}
{2, 3, 4, 5} {2, 3, 4, 5}
{1, 2, 3, 4} {1, 2, 3, 4}
{2, 3, 4} {2, 3, 4}

When X denotes the number of success in binomial experiment, it is called ________________?

1 Mark(s)

Your Answer:

Random variable Random variable
Binomial random variable Binomial random variable
Continuous random variable Continuous random variable
Both (b) and (c) but not (a) Both (b) and (c) but not (a)

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

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

What will be the output of the following Python code? print('ab'.isalpha())

1 Mark(s)

Your Answer:

True True
False False
None None
Error Error

What is the BeautifulSoup library used for in web scraping?

1 Mark(s)

Your Answer:

Sending HTTP requests Sending HTTP requests
Rendering JavaScript Rendering JavaScript
Extracting data from HTML and XML Extracting data from HTML and XML
Creating web forms Creating web forms

Who developed the Python language?

1 Mark(s)

Your Answer:

Zim Den Zim Den
Guido van Rossum Guido van Rossum
Niene Stom Niene Stom
Wick van Rossum Wick van Rossum

Given X1=12,X2=19,X3=10,X4=7, then summation of X equals?

1 Mark(s)

Your Answer:

36 36
48 48
41 41
None of these None of these

Statistics tests the law of ____________?

1 Mark(s)

Your Answer:

Other sciences Other sciences
physics physics
Business Business
Literary subjects Literary subjects

Two mutually exclusive events are __________?

1 Mark(s)

Your Answer:

Dependent Dependent
Independent Independent
Overlapped Overlapped
None of These None of These

How is polymorphism achieved in Python?

1 Mark(s)

Your Answer:

By using only class inheritance By using only class inheritance
By using only class composition By using only class composition
By using both class inheritance and composition
By using multiple inheritance only By using multiple inheritance only

Which of the following is not a valid attribute of a file object (fp)?

1 Mark(s)

Your Answer:

fp.name fp.name
fp.closed fp.closed
fp.mode fp.mode
fp.size fp.size

Why is "error analysis" an essential component of model evaluation in a data science capstone project?

1 Mark(s)

Your Answer:

Data preprocessing Data preprocessing
Model deployment Model deployment
Identify model weaknesses and improvements
Visualize data distributions Visualize data distributions

Which emerging technology enables the storage of data across a network of computers in a secure and decentralized manner?

1 Mark(s)

Your Answer:

Data warehouses Data warehouses
Quantum computing Quantum computing
Data lakes Data lakes
Blockchain Blockchain

__________ of the distribution which is measured relative to the distribution known as Normal?

1 Mark(s)

Your Answer:

Skewed Skewed
Flatness Flatness
Normal Normal
Moment Moment

In time series analysis, what does the "autoregressive integrated moving average" (ARIMA) model combine?

1 Mark(s)

Your Answer:

Autoregressive and moving average components
Seasonal and trend components Seasonal and trend components
Exponential and linear components Exponential and linear components
Seasonal and autocorrelation components Seasonal and autocorrelation components

What is the order of namespaces in which Python looks for an identifier?

1 Mark(s)

Your Answer:

Python first searches the built-in namespace, then the global namespace and finally the local namespace
Python first searches the built-in namespace, then the local namespace and finally the global namespace
Python first searches the local namespace, then the global namespace and finally the built-in namespace
Python first searches the global namespace, then the local namespace and finally the built-in namespace

Which of the following Python codes will result in an error? object = ‘a’

1 Mark(s)

Your Answer:

>>> pickle.dumps(object) >>> pickle.dumps(object)
>>> pickle.dumps(object, 3) >>> pickle.dumps(object, 3)
>>> pickle.dumps(object, 3, True) >>> pickle.dumps(object, 3, True)
>>> pickle.dumps('a', 2) >>> pickle.dumps('a', 2)

What will be the output of the following Python code? >>>t=(1,2,4,3) >>>t[1:3]

1 Mark(s)

Your Answer:

(1, 2) (1, 2)
(1, 2, 4) (1, 2, 4)
(2, 4) (2, 4)
(2, 4, 3) (2, 4, 3)

Which technology involves the use of AI and data analytics to analyze and predict trends in the real estate market?

1 Mark(s)

Your Answer:

FashionTech FashionTech
Precision agriculture Precision agriculture
Real estate analytics Real estate analytics
Healthcare resource optimization Healthcare resource optimization

What will be the output of the following Python code snippet?

1 Mark(s)

Your Answer:

prints all the vowels in my_string prints all the vowels in my_string
prints all the consonants in my_string prints all the consonants in my_string
prints all characters of my_string that aren't vowels
prints only on executing print(k) prints only on executing print(k)

What is the primary purpose of "NumPy" in data science?

1 Mark(s)

Your Answer:

Data manipulation Data manipulation
Data visualization Data visualization
Machine learning Machine learning
Web development Web development

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

1 Mark(s)

Your Answer:

Remove duplicates Remove duplicates
Group data Group data
Sort data Sort data
Fill missing values Fill missing values

In Python, which of the following is used to format a string left-justified within a field?

1 Mark(s)

Your Answer:

< <
> >
^ ^
= =

Which library in Python is commonly used for data manipulation and analysis in Data Science?

1 Mark(s)

Your Answer:

Pandas Pandas
Matplotlib Matplotlib
Scikit-Learn Scikit-Learn
TensorFlow TensorFlow

Is the following Python code valid? class B(object): def first(self): print("First method called") def second(): print("Second method called") ob = B() B.first(ob)

1 Mark(s)

Your Answer:

It isn't as the object declaration isn't right
It isn't as there isn't any __init__ method for initializing class members
Yes, this method of calling is called unbounded method call
Yes, this method of calling is called bounded method call

What will be the output of the following Python code? #generator def f(x): yield x+1 g=f(8) print(next(g))

1 Mark(s)

Your Answer:

8 8
9 9
7 7
Error Error

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 is the role of the @abstractmethod decorator in Python?

1 Mark(s)

Your Answer:

Define abstract classes Define abstract classes
Define instance methods Define instance methods
Mark a method as abstract Mark a method as abstract
Control method access Control method access

What is the primary goal of Data Science?

1 Mark(s)

Your Answer:

Data Visualization Data Visualization
Data Cleaning Data Cleaning
Predictive Analytics Predictive Analytics
Extracting Data from APIs Extracting Data from APIs

Which programming language is commonly used for Data Science tasks?

1 Mark(s)

Your Answer:

Java Java
Python Python
C++ C++
JavaScript JavaScript

What will be the output of the following Python code? r = [11, 12, 13, 14, 15, 16, 17, 18, 19] A = [[0, 10, 20], [30, 40, 50], [60, 70, 80]] for row in A: for col in row: r.append(col+10) r

1 Mark(s)

Your Answer:

[11, 12, 13, 14, 15, 16, 17, 18, 19, 10, 20, 30, 40, 50, 60, 70, 80, 90]
[10, 20, 30, 40, 50, 60, 70, 80, 90] [10, 20, 30, 40, 50, 60, 70, 80, 90]
[11, 12, 13, 14, 15, 16, 17, 18, 19] [11, 12, 13, 14, 15, 16, 17, 18, 19]
[0, 10, 20, 30, 40, 50, 60, 70, 80] [0, 10, 20, 30, 40, 50, 60, 70, 80]

Which deep learning framework is known for its flexibility and ease of use in building neural networks for data science?

1 Mark(s)

Your Answer:

PyTorch PyTorch
TensorFlow TensorFlow
Keras Keras
Scikit-learn Scikit-learn

What will be the output of the following Python code? >>> a={5,6,7,8} >>> b={7,8,9,10} >>> len(a+b)

1 Mark(s)

Your Answer:

8 8
Error, unsupported operand '+' for sets Error, unsupported operand '+' for sets
6 6
Nothing is displayed Nothing is displayed

What is the primary purpose of "data exploration" in data visualization?

1 Mark(s)

Your Answer:

Discover insights in the data Discover insights in the data
Add decorative elements Add decorative elements
Make charts more complex Make charts more complex
Slow down data analysis Slow down data analysis

What will be the output of the following Python code? import re s = 'abc123 xyz666 lmn-11 def77' re.sub(r'\b([a-z]+)(\d+)', r'\2\1:', s)

1 Mark(s)

Your Answer:

'123abc: 666xyz: lmn-11 77def:' '123abc: 666xyz: lmn-11 77def:'
'77def: lmn-11: 666xyz: 123abc' '77def: lmn-11: 666xyz: 123abc'
'abc123:', 'xyz666:', 'lmn-11:', 'def77:'
'abc123: xyz666: lmn-11: def77' 'abc123: xyz666: lmn-11: def77'

Can one block of except statements handle multiple exception?

1 Mark(s)

Your Answer:

yes, like except TypeError, SyntaxError [,...]
yes, like except [TypeError, SyntaxError]
no no
none of the mentioned none of the mentioned

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__()

Which statistical test is used to determine if there is a significant association between two categorical variables?

1 Mark(s)

Your Answer:

Chi-squared test Chi-squared test
T-test T-test
ANOVA ANOVA
Regression analysis Regression analysis

What is getattr() used for?

1 Mark(s)

Your Answer:

To access the attribute of the object To access the attribute of the object
To delete an attribute To delete an attribute
To check if an attribute exists or not To check if an attribute exists or not
To set an attribute To set an attribute

Evaluating Your Answers

Data Science Mock Test 7 : Question 1 of 57