Question 1

Question 1Assertion (A): Data Visualization helps users in analyzing a large amount of data in a simple way.Reasoning (R): Data Visualization makes complex data more accessible, understandable and usable.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

Both A and R are true and R is the correct explanation of A.ExplanationData visualization refers to the graphical or visual representation of information and data using visual elements like charts, graphs, and maps. These visual tools help in analyzing a large amount of data in a simple way. Because of this, data visualization makes complex data more accessible, understandable, and usable.

Question 2

Question 2Assertion (A): import matplotlib.pyplot as plt is used to import pyplot module.Reasoning (R): Matplotlib is a Python library and pyplot is a module that contains functions to create various plots.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

Both A and R are true and R is the correct explanation of A.ExplanationThe command to import pyplot is import matplotlib.pyplot as plt. Matplotlib is a Python 2D plotting library for creating publication-quality figures. Pyplot is a module within the Matplotlib library that contains a collection of methods which allow users to create 2D plots and graphs easily and interactively.

Question 3

Question 3Assertion (A): Data Visualization refers to the graphical representation of information and data using visual elements like charts, graphs and maps, etc.Reasoning (R): To install matplotlib library, we can use the command - pip install matplotlib.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

Both A and R are true but R is not the correct explanation of A.ExplanationData visualization refers to the graphical or visual representation of information and data using visual elements like charts, graphs, and maps. To install the Matplotlib library, we use the command pip install matplotlib.

Question 4

Question 4Assertion (A): A histogram is basically used to represent data provided in the form of groups spread in non-continuous ranges.Reasoning (R): matplotlib.pyplot.hist() function is used to compute and create histogram of a variable.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

A is false but R is true.ExplanationA histogram is used to represent data provided in the form of discrete or continuous ranges. The matplotlib.pyplot.hist() function is used to compute and create a histogram of a variable.

Question 5

Question 5Assertion (A): legend (labels = ['Text']) is used to give title to the graph.Reasoning (R): plt.savefig("path") will save the current graph in png or jpeg format.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

A is false but R is true.ExplanationThe statement legend(labels=['Text']) is used to add a legend to the graph, not a title. The title of the graph is set using plt.title('Title Text'). The statement plt.savefig("path") saves the current graph to the specified path in PNG or JPEG format.

Question 6

Question 6Assertion (A): In histogram, X-axis is about bin ranges whereas Y-axis talks about frequency.Reasoning (R): The bins (intervals) must be adjacent and are often (but are not required to be) of equal size.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

Both A and R are true and R is the correct explanation of A.ExplanationA histogram's X-axis shows the bin ranges, which are intervals for the data, and the Y-axis shows the frequency of data points within each bin. These bins must be adjacent to each other and are often of equal size, although they don't have to be.

Question 7

Question 7Assertion (A): Bar graph and histogram are same.Reasoning (R): A bar graph represents categorical data using rectangular bars. A histogram represents data which is grouped into continuous number ranges and each range corresponds to a vertical bar.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

A is false but R is true.ExplanationBar charts and histograms are not the same. A bar chart or bar graph is a chart that presents categorical data with rectangular bars, where the heights or lengths of the bars are proportional to the values they represent. On the other hand, a histogram is a type of graph that provides a visual interpretation of numerical data by indicating the number of data points that lie within a range of values, and this corresponds to a vertical bar.

Question 8

Question 8Assertion (A): Marker has different elements i.e., style, color, size, etc.Reasoning (R): We can customize line of a line chart by using marker property of plot() function.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

A is true but R is false.ExplanationA marker in a chart or graph can have various elements such as style (e.g., circle, square, triangle), color, size, and others. The marker property is used to customize the markers (points) in a chart, not the line itself. The line in a line chart can be customized using other properties such as linestyle, linewidth, color, etc.

Question 9

Question 1Hindustan Departmental Stores sell items of daily use such as shampoo, soap and much more. They record the entire sale and purchase of goods month-wise so as to get a proper analysis of profit or loss in their business transactions.Following is the csv file containing the "Company Sales Data".Read the total profit of all months and show it using a line plot. Total profit data has been provided for each month. Generated line plot must include the following properties:X label name = Month NumberY label name = Total profit

Accepted Answer

import pandas as pd
import matplotlib.pyplot as plt
df = pd.read_csv("C:\company_sales_data.csv")
profitList = df['total_profit'].tolist()
monthList = df['month_number'].tolist()
plt.plot(monthList, profitList, label = 'Month-wise Profit data of last year')
plt.xlabel('Month number')
plt.ylabel("Profit in dollars")
plt.xticks(monthList)
plt.title('Company profit per month')
plt.yticks([100000, 200000, 300000, 400000, 500000])
plt.show()Output

Question 10

Question 2Anirudh is trying to write a code to plot line graph shown in the figure below. Help him fill in the blanks in the code and get the desired output.import matplotlib.pyplot as plt             # statement 1
x = [1, 2, 3]                               # statement 2
y = [2, 4, 1]                               # Statement 3
plt.plot(x, y, color = 'g')                 # statement 4
...............                             # statement 5
...............                             # statement 6
# giving a title to graph
plt. ............... ('My first graph!')    # statement 7
# Function to show the plot 
...............                             # statement 8
(i) Which of the above statements is responsible for plotting the values on canvas?Statement 8Statement 4Statement 1None of these(ii) Statements 5 & 6 are used to give names to X-axis and Y-axis as shown in Fig.1. Which of the following can fill those two gaps?1.plt.xlabel('X - axis') 
plt.ylabel('Y - axis')
2.plt.xtitle('x - axis')
plt.ytitle('y - axis')
3.plt.xlable('x - axis')
pit.ylable('x - axis') 
4.plt.xlabel('x axis')
plt.ylabel('y axis')
(iii) Raman has executed code with first 7 statements but no output is displayed. Which of the following statements will display the graph?plt.display()plt.show()matplotlib.pyplot.display()Both (b) & (c)(iv) The number of markers in the above line chart are:ZeroThreeInfiniteNot defined(v) Which of the following methods will result in displaying 'My first graph!' in the above graph?legend()label()title()Both (a) & (c)

Accepted Answer

(i) Statement 4Reason — The plt.plot() statement is used to plot y versus x data on the canvas in Matplotlib.(ii)plt.xlabel('X - axis') 
plt.ylabel('Y - axis')
Reason — The xlabel() and ylabel() functions are used to give labels to x-axis and y-axis respectively.(iii) plt.show()Reason — The plt.show() statement is used to display the graph.(iv) ThreeReason — There are three markers in the line chart, corresponding to the three data points (1, 2), (2, 4), and (3, 1).(v) title()Reason — The plt.title() method is used to set the title of the graph, which in this case is "My first graph!".

Question 11

Question 1Data Visualization refers to the graphical or visual representation of information and data using visual elements like charts, graphs and maps, etc.

Accepted Answer