Data Science Mock Test 14 - Online MCQ Exam

Study the following program: i = 0 while i < 5: print(i) i += 1 if i == 3: break else: print(0) What will be the output of this statement? ``` i = 0 while i < 5: print(i) i += 1 if i == 3: break else: print(0) ```

1 Mark(s)

Your Answer:

1 2 3 1 2 3
0 1 2 3 0 1 2 3
0 1 2 0 1 2
3 2 1 3 2 1

Which type of data visualization is used to show the distribution of a dataset with a box and whisker plot?

1 Mark(s)

Your Answer:

Scatter plot Scatter plot
Bar chart Bar chart
Box plot Box plot
Pie chart Pie chart

What statistical technique is used to assess whether there is a significant difference between the means of two paired groups?

1 Mark(s)

Your Answer:

Chi-squared test Chi-squared test
ANOVA ANOVA
Paired t-test Paired t-test
Regression analysis Regression analysis

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

Where are the arguments received from the command line stored?

1 Mark(s)

Your Answer:

sys.argv sys.argv
os.argv os.argv
argv argv
none of the mentioned none of the mentioned

Which distributed computing framework is known for its high-speed, low-latency data processing capabilities and is suitable for real-time analytics?

1 Mark(s)

Your Answer:

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

What is the result of 10 + 2 * 6 / 3 ?

1 Mark(s)

Your Answer:

14 14
16 16
8 8
12 12

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

What Python function is used to perform element-wise mathematical operations on Numpy arrays?

1 Mark(s)

Your Answer:

describe() describe()
plt.plot() plt.plot()
df.apply() df.apply()
np.add() np.add()

What are some ethical considerations for web scraping?

1 Mark(s)

Your Answer:

Scraping any data without permission Scraping any data without permission
Ignoring robots.txt guidelines Ignoring robots.txt guidelines
Scraping personal or sensitive data Scraping personal or sensitive data
Scraping freely accessible public data Scraping freely accessible public data

Confidence interval should be ___________?

1 Mark(s)

Your Answer:

Shorter Shorter
Wider Wider
Large Large
Small Small

What will be the output of the following Python code? n = re.sub(r'\w+', 'Hello', 'Cats and dogs')

1 Mark(s)

Your Answer:

Hello Hello Hello Hello Hello Hello
‘Hello Hello Hello’ ‘Hello Hello Hello’
[‘Hello’, ‘Hello’, ‘Hello’] [‘Hello’, ‘Hello’, ‘Hello’]
(‘Hello’, ‘Hello’, ‘Hello’) (‘Hello’, ‘Hello’, ‘Hello’)

Which method in time series analysis is used to estimate the future values of a time series using past values and their associated weights?

1 Mark(s)

Your Answer:

Exponential Smoothing Exponential Smoothing
Moving Average Moving Average
ARIMA ARIMA
Seasonal Decomposition of Time Series Seasonal Decomposition of Time Series

What will be the output of the following Python code? def add(c,k): c.test=c.test+1 k=k+1 class A: def __init__(self): self.test = 0 def main(): Count=A() k=0 for i in range(0,25): add(Count,k) print("Count.test=", Count.test) print("k =", k) main()

1 Mark(s)

Your Answer:

Exception is thrown Exception is thrown
Count.test=25 k=25 Count.test=25 k=25
Count.test=25 k=0 Count.test=25 k=0
Count.test=0 k=0 Count.test=0 k=0

In data modeling, what is the term for the process of selecting and combining data from multiple sources for analysis?

1 Mark(s)

Your Answer:

Data Aggregation Data Aggregation
Data Integration Data Integration
Data Sampling Data Sampling
Data Transformation Data Transformation

How can you pass arguments to a decorator in Python?

1 Mark(s)

Your Answer:

By modifying the decorator's code By modifying the decorator's code
By using the @decorator syntax By using the @decorator syntax
By defining arguments within the function
By using the args keyword By using the args keyword

What will be the output of the following Python code? def foo(k): k = [1] q = [0] foo(q) print(q)

1 Mark(s)

Your Answer:

[0] [0]
[1] [1]
[1, 0] [1, 0]
[0, 1] [0, 1]

What will be the output of the following Python function? oct(7) oct(‘7’)

1 Mark(s)

Your Answer:

Error 07 Error 07
07 0o7 07 0o7
0o7 Error 0o7 Error
None of the above None of the above

What is the primary goal of shuffling and sorting in the MapReduce programming model?

1 Mark(s)

Your Answer:

To maximize data storage capacity To maximize data storage capacity
To optimize job scheduling and resource management
To reorganize data for Reducer tasks To reorganize data for Reducer tasks
To increase data variety To increase data variety

What will be the output of the following Python code? x = [[0], [1]] print(len(' '.join(list(map(str, x)))))

1 Mark(s)

Your Answer:

2 2
3 3
7 7
8 8

What is the primary goal of dimensionality reduction techniques in data modeling?

1 Mark(s)

Your Answer:

To increase model complexity To increase model complexity
To improve model accuracy To improve model accuracy
To reduce dimensionality To reduce dimensionality
To calculate summary statistics To calculate summary statistics

The median of normal distribution corresponds to the value of Z equal to_________________?

1 Mark(s)

Your Answer:

0.5 0.5
1 1
µ µ
0 0

How can you catch and handle multiple exceptions in a single except block in Python?

1 Mark(s)

Your Answer:

By enclosing the exceptions in parentheses and separating them with commas
By using the multiple keyword By using the multiple keyword
By using separate except blocks By using separate except blocks
By using the all keyword By using the all keyword

In Python, how can you join two or more lists together?

1 Mark(s)

Your Answer:

+ operator + operator
concat() concat()
join() join()
merge() merge()

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

Which data visualization type is commonly used to display the distribution of a continuous variable across multiple categories?

1 Mark(s)

Your Answer:

Scatter plot matrix Scatter plot matrix
Bar chart Bar chart
Box plot Box plot
Line chart Line chart

What type of chart is often used to visualize the frequency distribution of a categorical variable?

1 Mark(s)

Your Answer:

Scatter plot Scatter plot
Bar chart Bar chart
Line chart Line chart
Box plot Box plot

What is the purpose of the @property decorator in advanced OOP?

1 Mark(s)

Your Answer:

To define a setter method for a class attribute
To define a getter method for a class attribute
To add properties to classes To add properties to classes
To define methods for instance attributes

Which symbol is used to denote a decorator in Python syntax?

1 Mark(s)

Your Answer:

@ @
# #
& &
* *

In case of symmetrical distribution?

1 Mark(s)

Your Answer:

β1=β4 β1=β4
Mean=Mode=Median Mean=Mode=Median
µ1=µ4 µ1=µ4
µ1=µ2 µ1=µ2

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

Which machine learning algorithm is commonly used for recommendation systems, such as suggesting products to online shoppers?

1 Mark(s)

Your Answer:

K-Means Clustering K-Means Clustering
Collaborative Filtering Collaborative Filtering
Principal Component Analysis (PCA) Principal Component Analysis (PCA)
Support Vector Machine (SVM) Support Vector Machine (SVM)

Evaluating Your Answers

Data Science Mock Test 14 : Question 1 of 32