Data Science Mock Test 13 - Online MCQ Exam

In business analytics, what does "BI" stand for in the context of business analytics?

1 Mark(s)

Your Answer:

Business Intelligence Business Intelligence
Big Insights Big Insights
Better Integration Better Integration
Behavioral Improvement Behavioral Improvement

Write a list comprehension for number and its cube for: l=[1, 2, 3, 4, 5, 6, 7, 8, 9]

1 Mark(s)

Your Answer:

[x**3 for x in l] [x**3 for x in l]
[x^3 for x in l] [x^3 for x in l]
[x**3 in l] [x**3 in l]
[x^3 in l] [x^3 in l]

The purpose of name mangling is to avoid unintentional access of private class members.

1 Mark(s)

Your Answer:

True True
False False

The height of a student is 60 inches. This is an example of________________?

1 Mark(s)

Your Answer:

Qualitative data Qualitative data
Categorical data Categorical data
Continuous data Continuous data
Discrete data Discrete data

What is the purpose of the try and except blocks in Python?

1 Mark(s)

Your Answer:

To handle errors and exceptions To handle errors and exceptions
To define functions To define functions
To create loops To create loops
To declare variables To declare variables

All keywords in Python are in . . . . . . . .

1 Mark(s)

Your Answer:

Capitalized Capitalized
lower case lower case
UPPER CASE UPPER CASE
None of the mentioned None of the mentioned

What is the robots.txt file used for?

1 Mark(s)

Your Answer:

Blocking all web scraping activities Blocking all web scraping activities
Allowing all web scraping activities Allowing all web scraping activities
Providing guidelines for web scraping Providing guidelines for web scraping
Controlling browser rendering Controlling browser rendering

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()

What is the purpose of the __init__.py file in a Python module?

1 Mark(s)

Your Answer:

It indicates that the directory should be treated as a Python package
It contains the main code of the module It contains the main code of the module
It defines a new class It defines a new class
It imports all modules in the directory It imports all modules in the directory

The difference between the functions re.sub and re.subn is that re.sub returns a . . . . . . . . whereas re.subn returns a . . . . . . . .

1 Mark(s)

Your Answer:

string, list string, list
list, tuple list, tuple
string, tuple string, tuple
tuple, list tuple, list

How can you add a new key-value pair to a dictionary in Python?

1 Mark(s)

Your Answer:

my_dict['new_key'] = new_value my_dict['new_key'] = new_value
add('new_key', new_value) add('new_key', new_value)
insert('new_key', new_value) insert('new_key', new_value)
append('new_key', new_value) append('new_key', new_value)

Which of the following statements is used to create an empty set?

1 Mark(s)

Your Answer:

{ } { }
set() set()
[ ] [ ]
( ) ( )

What will be the output of the following code: my_list = [1, 2, 3] my_list.reverse() print(my_list)

1 Mark(s)

Your Answer:

[1, 2, 3] [1, 2, 3]
[3, 2, 1] [3, 2, 1]
[2, 3, 1] [2, 3, 1]
[1, 3, 2] [1, 3, 2]

What will be the output of the following Python code? >>> a={1,2,3} >>> a.intersection_update({2,3,4,5}) >>> a

1 Mark(s)

Your Answer:

{2,3} {2,3}
Error, duplicate item present in list Error, duplicate item present in list
Error, no method called intersection_update for set data type
{1,4,5} {1,4,5}

What is the output of the following piece of code? a=list((45,)*4) print((45)*4) print(a)

1 Mark(s)

Your Answer:

180 [(45),(45),(45),(45)] 180 [(45),(45),(45),(45)]
(45,45,45,45) [45,45,45,45] (45,45,45,45) [45,45,45,45]
180 [45,45,45,45] 180 [45,45,45,45]
Syntax error Syntax error

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)

If _________ then the distribution is positively skewed?

1 Mark(s)

Your Answer:

p < q p < q
q/p q/p
p > q p > q
p > 1/2 p > 1/2

Which of the following is not an example of a discrete probability distribution ?

1 Mark(s)

Your Answer:

The sale or purchase price of a house The sale or purchase price of a house
The number of bedrooms in a house The number of bedrooms in a house
Whether or no t a home has a swimming pool in it.
Non of these Non of these

Which one of the following syntaxes is the correct syntax to read from a simple text file stored in ''d:\java.txt''?

1 Mark(s)

Your Answer:

Infile = open(''d:\\java.txt'', ''r'') Infile = open(''d:\\java.txt'', ''r'')
Infile = open(file=''d:\\\java.txt'', ''r'')
Infile = open(''d:\java.txt'',''r'') Infile = open(''d:\java.txt'',''r'')
Infile = open.file(''d:\\java.txt'',''r'')

Which built-in function is used to convert a value to a string?

1 Mark(s)

Your Answer:

str() str()
string() string()
to_str() to_str()
convert_string() convert_string()

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

What will be the output of the following Python code? i = 1 while True: if i%3 == 0: break print(i) i + = 1

1 Mark(s)

Your Answer:

1 2 3 1 2 3
error error
1 2 1 2
none of the mentioned none of the mentioned

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

1 Mark(s)

Your Answer:

[3, 6, 9, 16, 20, 24, 35, 40, 45] [3, 6, 9, 16, 20, 24, 35, 40, 45]
Error Error
[0, 30, 60, 120, 160, 200, 300, 350, 400]
0 0

How do you delete a file?

1 Mark(s)

Your Answer:

del(fp) del(fp)
fp.delete() fp.delete()
os.remove('file') os.remove('file')
os.delete('file') os.delete('file')

The value returned when we use the function isoweekday() is . . . . . . . . and that for the function weekday() is . . . . . . . . if the system date is 19th June, 2017 (Monday).

1 Mark(s)

Your Answer:

0,0 0,0
0,1 0,1
1,0 1,0
1,1 1,1

The following python program can work with . . . . . . . . parameters. def f(x): def f1(*args, **kwargs): print("Examveda") return x(*args, **kwargs) return f1

1 Mark(s)

Your Answer:

any number of any number of
0 0
1 1
2 2

What is the data type of (1)?

1 Mark(s)

Your Answer:

Tuple Tuple
Integer Integer
List List
Both tuple and integer Both tuple and integer

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

1 Mark(s)

Your Answer:

Rounds a floating-point number to the nearest integer
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
Converts a number to a string Converts a number to a string

Which of the following is not a correct statement about a Probability _________________?

1 Mark(s)

Your Answer:

It must have a value between 0 and 1 It must have a value between 0 and 1
It can be reported as a decimal or a fraction
A value near 0 means that the event is not likely to occur/happens
It is the collection of several experiment

What does the term "CRUD" stand for in the context of databases?

1 Mark(s)

Your Answer:

Create, Read, Update, Delete Create, Read, Update, Delete
Control, Remove, Update, Deliver Control, Remove, Update, Deliver
Copy, Read, Upload, Delete Copy, Read, Upload, Delete
Create, Retrieve, Upload, Deliver Create, Retrieve, Upload, Deliver

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

Which of the following data types in Python is used to store key-value pairs?

1 Mark(s)

Your Answer:

Dictionary Dictionary
List List
Tuple Tuple
Set Set

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

In machine learning, what does the term "bias" refer to when evaluating a model's performance?

1 Mark(s)

Your Answer:

The model's flexibility The model's flexibility
The difference between predicted and actual values
The model's ability to generalize The model's ability to generalize
The model's ability to fit the training data

What does the acronym "BI" stand for in the context of business analytics?

1 Mark(s)

Your Answer:

Business Intelligence Business Intelligence
Big Insights Big Insights
Better Integration Better Integration
Behavioral Improvement Behavioral Improvement

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 will be the output of the following Python code? x = 'abcd' print(list(map([], x)))

1 Mark(s)

Your Answer:

['a', 'b', 'c', 'd'] ['a', 'b', 'c', 'd']
['abcd'] ['abcd']
[['a'], ['b'], ['c'], ['d']] [['a'], ['b'], ['c'], ['d']]
none of the mentioned none of the mentioned

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 of the following statements is used to create an empty set in Python?

1 Mark(s)

Your Answer:

( ) ( )
[ ] [ ]
{ } { }
set() set()

In Pandas, what method is used to calculate the mean, median, and other summary statistics for numerical columns in a DataFrame?

1 Mark(s)

Your Answer:

sort_values() sort_values()
melt() melt()
describe() describe()
pivot() pivot()

Study the following statements: >>> str1 = "javat" >>> str2 = ":" >>> str3 = "point" >>> str1[-1:] What will be the output of this statement? ``` >>> str1 = "javat" >>> str2 = ":" >>> str3 = "point" >>> str1[-1:] ```

1 Mark(s)

Your Answer:

t t
j j
point point
java java

Which data visualization type is often used to display hierarchical data as a rectangular diagram with branching nodes?

1 Mark(s)

Your Answer:

Scatter plot Scatter plot
Bar chart Bar chart
Tree diagram Tree diagram
Sunburst chart Sunburst chart

Which hypothesis tell us weather test is one tail or 2 tail?

1 Mark(s)

Your Answer:

simple hypothesis simple hypothesis
null hypothesis null hypothesis
all of the above all of the above
None of these None of these

What is the purpose of the return statement in a function?

1 Mark(s)

Your Answer:

Prints a value to the console Prints a value to the console
Terminates the program Terminates the program
Exits the function and returns a value Exits the function and returns a value
Declares a variable Declares a variable

In Python, how can you check if a key exists in a dictionary?

1 Mark(s)

Your Answer:

in keyword in keyword
exists() exists()
contains() contains()
check() check()

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

If an event consists of only one sample point is called _____________?

1 Mark(s)

Your Answer:

Appeared Appeared
Exactly Exactly
Space Space
Elementary event Elementary event

What is the purpose of the except clause without specifying an exception type in a try block?

1 Mark(s)

Your Answer:

To catch any exception that occurs within the try block
To catch only specific exceptions To catch only specific exceptions
To handle syntax errors To handle syntax errors
To define a block To define a block

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

1 Mark(s)

Your Answer:

It writes data to the file It writes data to the file
It reads the file contents It reads the file contents
It creates a new file It creates a new file
It closes the file It closes the file

Let X1,X2,…Xn be a random sample from the density f(x;(θ), where θ may be vector. If the conditional distribution of X1,X2,…Xn given S=s does not depend on θ for any value of s of S, then statistic is called?

1 Mark(s)

Your Answer:

Minimal sufficient statistic Minimal sufficient statistic
Sufficient statistic Sufficient statistic
Efficient Efficient
Minimax statistics Minimax statistics

In Python, how can you get a list of all keys in a dictionary?

1 Mark(s)

Your Answer:

keys() keys()
get_keys() get_keys()
all_keys() all_keys()
list_keys() list_keys()

In the context of data ethics, what is "informed consent"?

1 Mark(s)

Your Answer:

Removing outliers from a dataset Removing outliers from a dataset
Creating data backups Creating data backups
Sharing data publicly Sharing data publicly
Obtaining permission from individuals before collecting their data

What will be the output of the following Python code snippet? for i in ''.join(reversed(list('abcd'))): print (i)

1 Mark(s)

Your Answer:

a b c d a b c d
d c b a d c b a
error error
none of the mentioned none of the mentioned

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]

What will the following code print: x = 5 while x > 0: print(x) x -= 1

1 Mark(s)

Your Answer:

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

Which technology involves the use of AI and data analytics to enhance the efficiency and safety of manufacturing processes?

1 Mark(s)

Your Answer:

EdTech EdTech
Smart manufacturing Smart manufacturing
Content personalization Content personalization
None of the above None of the above

What is the term for the use of AI and data analytics to optimize and automate the management of energy consumption in smart homes?

1 Mark(s)

Your Answer:

Home energy management Home energy management
Route optimization Route optimization
VR experience optimization VR experience optimization
Interactive storytelling Interactive storytelling

What will be the output of the following Python code? print("xyyzxyzxzxyy".count('yy', 2))

1 Mark(s)

Your Answer:

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

What is the term for the use of AI to optimize and automate the management of inventory and supply chains?

1 Mark(s)

Your Answer:

Quantum computing Quantum computing
Data engineering Data engineering
Internet of Things (IoT) Internet of Things (IoT)
Supply chain optimization Supply chain optimization

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

What is the primary purpose of the "Granger causality test" in time series analysis?

1 Mark(s)

Your Answer:

To identify seasonality in the data To identify seasonality in the data
To test for causality between time series data
To remove outliers from the data To remove outliers from the data
To add noise to the data To add noise to the data

What will be the output of the following Python function? re.findall("hello world", "hello", 1)

1 Mark(s)

Your Answer:

["hello"] ["hello"]
[ ] [ ]
hello hello
hello world hello world

The mean, median and mode for binomial distribution will be equal when:______________?

1 Mark(s)

Your Answer:

p= 0.5 p= 0.5
P 0.5 P 0.5
p = 1 p = 1
None of these None of these

What is the result of `12 | 10 & 9` ?

1 Mark(s)

Your Answer:

12 12
10 10
9 9
8 8

What is the result of True ^ False ?

1 Mark(s)

Your Answer:

True True
False False
None None
Error Error

Data structure in which a record is linked to two successor records, usually referred to as the left branch when greater and the right when less than the previous record is termed as:

1 Mark(s)

Your Answer:

customized array customized array
stack stack
binary tree binary tree
decimal tree decimal tree

What is the primary role of "model evaluation" in a data science capstone project?

1 Mark(s)

Your Answer:

Assessing the model's performance Assessing the model's performance
Writing the project proposal Writing the project proposal
Data collection Data collection
Data preprocessing Data preprocessing

What will be the output of the following code: keys = ['a', 'b', 'c'] values = 0 my_dict = dict.fromkeys(keys, values) print(my_dict)

1 Mark(s)

Your Answer:

{'a': 0, 'b': 0, 'c': 0} {'a': 0, 'b': 0, 'c': 0}
{'a': [0], 'b': [0], 'c': [0]} {'a': [0], 'b': [0], 'c': [0]}
{0: ['a', 'b', 'c']} {0: ['a', 'b', 'c']}
{'a': 'b', 'b': 'c', 'c': 0} {'a': 'b', 'b': 'c', 'c': 0}

1 – α is the probability of_____________?

1 Mark(s)

Your Answer:

Acceptance Region Acceptance Region
Type-I error Type-I error
Type-II Error Type-II Error
Rejection Region Rejection Region

Evaluating Your Answers

Data Science Mock Test 13 : Question 1 of 69