Data Science Mock Test 12 - Online MCQ Exam

What does the function math.frexp(x) return?

1 Mark(s)

Your Answer:

a tuple containing the mantissa and the exponent of x
a list containing the mantissa and the exponent of x
a tuple containing the mantissa of x a tuple containing the mantissa of x
a list containing the exponent of x a list containing the exponent of x

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

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Your Answer:

Automated machine learning Automated machine learning
Data visualization Data visualization
Web scraping Web scraping
Statistical analysis Statistical analysis

What will be the output of the following Python code? print("abc. DEF".capitalize())

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Your Answer:

Abc. def Abc. def
abc. def abc. def
Abc. Def Abc. Def
ABC. DEF ABC. DEF

How can you create a private attribute in a Python class?

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Your Answer:

By prefixing the attribute name with an underscore (_)
By using the private keyword By using the private keyword
By using the hidden keyword By using the hidden keyword
By using the secure keyword By using the secure keyword

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

1 Mark(s)

Your Answer:

Error Error
[[1, 4, 7], [2, 5, 8], [3, 6, 9]] [[1, 4, 7], [2, 5, 8], [3, 6, 9]]
1 4 7 2 5 8 3 6 9 1 4 7 2 5 8 3 6 9
(1 4 7) (2 5 8) (3 6 9) (1 4 7) (2 5 8) (3 6 9)

What is the primary purpose of a data warehouse in data modeling?

1 Mark(s)

Your Answer:

To visualize data relationships To visualize data relationships
To predict future data To predict future data
To store and manage historical data To store and manage historical data
To calculate summary statistics To calculate summary statistics

What is the result of 5 & 6 ^ 6 ?

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Your Answer:

6 6
5 5
0 0
1 1

What is the purpose of the @wraps decorator in Python's functools module?

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Your Answer:

Preserve original function's metadata Preserve original function's metadata
Create wrappers for functions Create wrappers for functions
Decorate GUI elements Decorate GUI elements
Modify function arguments Modify function arguments

In business analytics, what does the term "data integration" refer to?

1 Mark(s)

Your Answer:

Combining data from multiple sources Combining data from multiple sources
Storing data in a single database Storing data in a single database
Reducing data complexity Reducing data complexity
Sharing data with competitors Sharing data with competitors

What is the use of seek() method in files?

1 Mark(s)

Your Answer:

sets the file's current position at the offset
sets the file's previous position at the offset
sets the file's current position within the file
none of the mentioned none of the mentioned

What is the primary goal of the "Ljung-Box 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 autocorrelation in the data To test for autocorrelation in the 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 code? def foo(): try: return 1 finally: return 2 k = foo() print(k)

1 Mark(s)

Your Answer:

error, there is more than one return statement in a single try-finally block
3 3
2 2
1 1

Which of the following is a true statement for comparing the t distribution with standard normal ?

1 Mark(s)

Your Answer:

Greater the degree of freedom, the more the t-distribution resembles the standard normal distribution
The Normal Curve is symmetrical whereas the t-distribution are slightly skewed.
The proportion of area beyond a specific value of “t” is less than the proportion of normal curve
Non of these Non of these

. . . . . . . . returns a dictionary of the module namespace. . . . . . . . . returns a dictionary of the current namespace.

1 Mark(s)

Your Answer:

locals() globals() locals() globals()
locals() locals() locals() locals()
globals() locals() globals() locals()
globals() globals() globals() globals()

How can you pass a variable number of keyword arguments to a function in Python?

1 Mark(s)

Your Answer:

By using the **kwargs syntax By using the **kwargs syntax
By using the *args syntax By using the *args syntax
By using the * symbol By using the * symbol
By using the ... symbol By using the ... symbol

What is the purpose of the __name__ variable in a Python module?

1 Mark(s)

Your Answer:

It indicates whether the module is being run as the main program or imported
It stores the code of the module It stores the code of the module
It defines a new variable It defines a new variable
It is used to create aliases for modules

Which of the following Python statements will result in the output: 6? A = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

1 Mark(s)

Your Answer:

A[2][1] A[2][1]
A[1][2] A[1][2]
A[3][2] A[3][2]
A[2][3] A[2][3]

Why is it crucial to incorporate "feedback loops" and "continuous improvement" in a data science capstone project?

1 Mark(s)

Your Answer:

Create more project documentation Create more project documentation
Replace data exploration Replace data exploration
Adapt to changing requirements Adapt to changing requirements
Choose the mentor Choose the mentor

What is the primary objective of "data audit trails" in data ethics and privacy?

1 Mark(s)

Your Answer:

To restrict data sharing To restrict data sharing
To improve data accuracy To improve data accuracy
To track data usage To track data usage
To maintain a record of data access To maintain a record of data access

In the context of big data analytics, what is the term for the process of combining data from multiple sources and formats into a single, unified dataset?

1 Mark(s)

Your Answer:

Data sampling Data sampling
Data integration Data integration
Data deduplication Data deduplication
Data preprocessing Data preprocessing

What is the primary challenge in processing and analyzing unstructured data in a big data environment?

1 Mark(s)

Your Answer:

Limited data volume Limited data volume
Data skew Data skew
Data variety Data variety
Data veracity Data veracity

Arithmetic mean of two positive numbers “X” and “Y” is_________________?

1 Mark(s)

Your Answer:

ab2 ab2
2a2 2a2
(a+b)/2 (a+b)/2
a−b2 a−b2
2a+b 2a+b

Suppose there is a list such that: l=[2,3,4]. If we want to print this list in reverse order, which of the following methods should be used?

1 Mark(s)

Your Answer:

reverse(l) reverse(l)
list(reverse[(l)]) list(reverse[(l)])
reversed(l) reversed(l)
list(reversed(l)) list(reversed(l))

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

In a binomial distribution, n = 20 and p = 3/5, then variance of this distribution ______________?

1 Mark(s)

Your Answer:

60 60
12 12
4.8 4.8
0 0

Which type of data visualization is used to display the relationship between three variables in a 3D space?

1 Mark(s)

Your Answer:

Scatter plot matrix Scatter plot matrix
Treemap Treemap
Bubble chart Bubble chart
Heatmap Heatmap

What is the output of the following code: my_list = [1, 2, 3, 4] my_list.remove(2) print(my_list)

1 Mark(s)

Your Answer:

[1, 2, 3, 4] [1, 2, 3, 4]
[1, 3, 4] [1, 3, 4]
[1, 2, 4] [1, 2, 4]
[1, 3] [1, 3]

Random numbers are also called__________________?

1 Mark(s)

Your Answer:

Random experiment Random experiment
random Errors random Errors
Random digits Random digits
None of these None of these

What is the primary use of "word embeddings" in NLP?

1 Mark(s)

Your Answer:

To generate random words To generate random words
To improve text readability To improve text readability
To represent words as numerical vectors To represent words as numerical vectors
To perform tokenization To perform tokenization

The successive trials are with replacement in:________________?

1 Mark(s)

Your Answer:

Hpergeometric distribution Hpergeometric distribution
Binomial distribution Binomial distribution
Geometric distribution Geometric distribution
None of these None of these

Weighted Index number can be classified into _________ categories?

1 Mark(s)

Your Answer:

Four Four
Three Three
Five Five
Two Two

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

1 Mark(s)

Your Answer:

Precision Precision
Recall Recall
Mean Absolute Error (MAE) Mean Absolute Error (MAE)
F1 Score F1 Score

Which of the following language designed mainly for object oriented programming, but with some procedural elements?

1 Mark(s)

Your Answer:

Java Java
PHP PHP
Visual Basic Visual Basic
Matlab Matlab

Mean of the binomial distribution is ______________?

1 Mark(s)

Your Answer:

Pq Pq
nP nP
xm xm
Non of these Non of these

If bxy = byx = r then ________________?

1 Mark(s)

Your Answer:

6x < 6y 6x < 6y
6y < 6x 6y < 6x
6x = 6y 6x = 6y
Non of These Non of These

How do you add an image to a Tkinter application?

1 Mark(s)

Your Answer:

add_image() add_image()
image.insert() image.insert()
Label(image=...) Label(image=...)
ImageWidget(image=...) ImageWidget(image=...)

The weighty system changed with _______________?

1 Mark(s)

Your Answer:

Yearly Yearly
Basely Basely
Timely Timely
Averagely Averagely

How do you create a dropdown menu in Tkinter?

1 Mark(s)

Your Answer:

DropdownMenu() DropdownMenu()
CreateMenu() CreateMenu()
OptionMenu() OptionMenu()
MenuDropdown() MenuDropdown()

What is a namespace in Python?

1 Mark(s)

Your Answer:

A container for holding identifiers (names)
A module in Python A module in Python
A reserved keyword A reserved keyword
A built-in function A built-in function

Which built-in function is used to find the smallest item in an iterable?

1 Mark(s)

Your Answer:

min() min()
smallest() smallest()
minimum() minimum()
small() small()

The class ___ are obtained when we divide the sums of the lower and upper class limits by 2?

1 Mark(s)

Your Answer:

Limit Limit
Points Points
Marks Marks
Class boundary Class boundary

What does the '//' operator do when used with negative numbers?

1 Mark(s)

Your Answer:

Returns the positive quotient Returns the positive quotient
Returns the negative quotient Returns the negative quotient
Rounds down to the nearest integer Rounds down to the nearest integer
Rounds up to the nearest integer Rounds up to the nearest integer

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

How do parameterized queries help prevent SQL injection?

1 Mark(s)

Your Answer:

By encrypting database queries By encrypting database queries
By removing SQL keywords By removing SQL keywords
By sanitizing user input By sanitizing user input
By executing multiple queries at once By executing multiple queries at once

Which technology is commonly used for streamlining the data velocity aspect of big data, allowing for real-time data collection and analysis?

1 Mark(s)

Your Answer:

Data lakes Data lakes
Data warehouses Data warehouses
Internet of Things (IoT) Internet of Things (IoT)
Apache Kafka Apache Kafka

what is the probability of a type II error when α=0.05 ?

1 Mark(s)

Your Answer:

0.025 0.025
0.95 0.95
0.05 0.05
Cannot be determined without more information

What will be the output of the following Python code? i = 1 while True: if i%0O7 == 0: break print(i) i += 1

1 Mark(s)

Your Answer:

1 2 3 4 5 6 1 2 3 4 5 6
1 2 3 4 5 6 7 1 2 3 4 5 6 7
error error
none of the mentioned none of the mentioned

Which statistical method is used to determine the order of differencing in an ARIMA model?

1 Mark(s)

Your Answer:

Augmented Dickey-Fuller test Augmented Dickey-Fuller test
Seasonal Decomposition of Time Series Seasonal Decomposition of Time Series
Ljung-Box test Ljung-Box test
PACF (Partial Autocorrelation Function) PACF (Partial Autocorrelation Function)

Which method is used to remove the first occurrence of a specific element in a list or tuple?

1 Mark(s)

Your Answer:

remove() remove()
delete() delete()
erase() erase()
discard() discard()

What will be the output of the following Python code snippet? print('xyyxyyxyxyxxy'.replace('xy', '12', 0))

1 Mark(s)

Your Answer:

xyyxyyxyxyxxy xyyxyyxyxyxxy
12y12y1212x12 12y12y1212x12
12yxyyxyxyxxy 12yxyyxyxyxxy
xyyxyyxyxyx12 xyyxyyxyxyx12

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

What will be the output of the following Python code? print("abcdef".center(10, '12'))

1 Mark(s)

Your Answer:

12abcdef12 12abcdef12
abcdef1212 abcdef1212
1212abcdef 1212abcdef
error error

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Data Science Mock Test 12 : Question 1 of 52