Data Science Mock Test 3 - Online MCQ Exam

In Python, how can you create an empty dictionary?

1 Mark(s)

Your Answer:

dict() dict()
{} {}
empty_dict() empty_dict()
new_dict() new_dict()

What will be the output of the following Python code? >>>example = "helle" >>>example.find("e")

1 Mark(s)

Your Answer:

Error Error
-1 -1
1 1
0 0

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

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Your Answer:

[2, 2] [2, 2]
2 2
4 4
none of the mentioned none of the mentioned

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

Study the following statements: >>> print(0xA + 0xB + 0xC) What will be the output of this statement? ``` >>> print(0xA + 0xB + 0xC) ```

1 Mark(s)

Your Answer:

33 33
63 63
0xA + 0xB + 0xC 0xA + 0xB + 0xC
None of these None of these

In an economical model, physical object is:

1 Mark(s)

Your Answer:

economics economics
transport transport
probability probability
country country

Which cloud computing platform offers services such as Amazon SageMaker for building machine learning models?

1 Mark(s)

Your Answer:

Amazon Web Services (AWS) Amazon Web Services (AWS)
Microsoft Azure Microsoft Azure
Google Cloud Platform (GCP) Google Cloud Platform (GCP)
IBM Cloud IBM Cloud

The function used to alter the thickness of the pen to 'x' units:

1 Mark(s)

Your Answer:

turtle.width(x) turtle.width(x)
turtle.span(x) turtle.span(x)
turtle.girth(x) turtle.girth(x)
turtle.thickness(x) turtle.thickness(x)

Which NLP task involves determining the sentiment or emotional tone expressed in a piece of text, such as positive, negative, or neutral?

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

In data preprocessing, what is the process of converting data values into a standard format to remove noise and variations?

1 Mark(s)

Your Answer:

Data Scaling Data Scaling
Data Transformation Data Transformation
Data Normalization Data Normalization
Data Imputation Data Imputation

What will be the output of the following Python code? x=set('abcde') y=set('xyzbd') x.difference_update(y) x y

1 Mark(s)

Your Answer:

{‘a’, ‘b’, ‘c’, ‘d’, ‘e’} {‘x’, ‘y’, ‘z’}
{‘a’, ‘c’, ‘e’} {‘x’, ‘y’, ‘z’, ‘b’, ‘d’}
{‘b’, ‘d’} {‘b’, ‘d’} {‘b’, ‘d’} {‘b’, ‘d’}
{‘a’, ‘c’, ‘e’} {‘x’, ‘y’, ‘z’}

The . . . . . . . . symbol along with the name of the decorator function can be placed above the definition of the function to be decorated works as an alternate way for decorating a function.

1 Mark(s)

Your Answer:

# #
$ $
@ @
& &

You asked five of your classmates about their height. On the basis of this information, you stated that the average height of all students in your university or college is 67 inches. This is an example of ?

1 Mark(s)

Your Answer:

Descriptive statistics Descriptive statistics
Inferential Statistics Inferential Statistics
Parameter Parameter
Population Population

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

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

Which of the following is NOT typically considered a part of the Data Science process?

1 Mark(s)

Your Answer:

Data Collection Data Collection
Data Visualization Data Visualization
Data Cleaning Data Cleaning
Software Development Software Development

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

1 Mark(s)

Your Answer:

12 12
10 10
9 9
8 8

In Python, which module provides functions for working with dates and times?

1 Mark(s)

Your Answer:

random random
math math
numpy numpy
datetime datetime

What is the result of 9 ^ (5 & 3) ?

1 Mark(s)

Your Answer:

8 8
7 7
1 1
2 2

In a data visualization, what does "color saturation" refer to?

1 Mark(s)

Your Answer:

The intensity or vividness of color The intensity or vividness of color
The use of color in charts The use of color in charts
The title of a chart The title of a chart
The number of data points The number of data points

1. Nos. is a ____ for measuring changes in a variable or a group of related variables?

1 Mark(s)

Your Answer:

variable variable
Region of goods Region of goods
Device Device
Cost Cost

What is the purpose of the execute() method in the sqlite3 module?

1 Mark(s)

Your Answer:

To print messages to the console To print messages to the console
To fetch data from a database To fetch data from a database
To execute SQL queries on a database To execute SQL queries on a database
To create new tables in a database To create new tables in a database

What will be the output of the following Python code snippet? for x in set('pqr'): print(x*2)

1 Mark(s)

Your Answer:

pp qq rr pp qq rr
pqr pqr pqr pqr
ppqqrr ppqqrr
pqrpqr pqrpqr

What is the keyword used in Python to define a generator function?

1 Mark(s)

Your Answer:

yield yield
return return
generator generator
produce produce

In a binomial distribution the probability of ___________ changes from trial to trial?

1 Mark(s)

Your Answer:

Failure Failure
Experiment Experiment
Success Success
Out come Out come

What is the significance of "data storage" and "data retrieval" solutions in a data science capstone project?

1 Mark(s)

Your Answer:

Conduct data exploration Conduct data exploration
Efficiently manage and access data Efficiently manage and access data
Simplify the project report Simplify the project report
None of the above None of the above

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

Which of the following transforms can be performed with data value?

1 Mark(s)

Your Answer:

log2 log2
cos cos
log10 log10
all of the mentioned all of the mentioned

What will be the output of the following Python code? >>> a=[14,52,7] >>>> b=a.copy() >>> b is a

1 Mark(s)

Your Answer:

True True
False False

Which distributed computing framework is known for its support of graph algorithms and is often used for analyzing large-scale graph data?

1 Mark(s)

Your Answer:

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

What is the use of tell() method in python?

1 Mark(s)

Your Answer:

tells you the current position within the file
tells you the end position within the file
tells you the file is opened or not tells you the file is opened or not
none of the mentioned none of the mentioned

What is the primary purpose of an Entity-Relationship Diagram (ERD) in data modeling?

1 Mark(s)

Your Answer:

To visualize the data distribution To visualize the data distribution
To represent the structure of a database
To calculate summary statistics To calculate summary statistics
To display relationships between entities

In distributed computing, what is the purpose of 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 will be the output of the following Python code? l1=[1, 2, 3, [4]] l2=list(l1) id(l1)==id(l2)

1 Mark(s)

Your Answer:

True True
False False
Error Error
Address of l1 Address of l1

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Data Science Mock Test 3 : Question 1 of 34