# CBSE Class 12 Informatics Practices Boards 2020 Sample Paper Solved

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CBSE Class 12 Informatics Practices Boards 2020 Sample Paper Solved. CBSE has recently released the class 12 sample papers for subject Informatics Practices. These suggested sample papers are released every year by CBSE ahead of the class 12 board exams so that the students can understand the pattern of question paper and type of questions which is expected to come in the Class 12 board exams. Students can refer to the attached question paper along with marking scheme to understand what they can expect in the board exams in 2020. Its always better to solve the question paper first and then refer to provided answers.

Section A

1 a) Find the output of following program.
import numpy as np
d=np.array([10,20,30,40,50,60,70])
print(d[-4:])

b) Fill in the blank with appropriate numpy method to calculate and print the variance of an array.
import numpy as np
data=np.array([1,2,3,4,5,6])
print(np.___(data,ddof=0)

c) Mr. Sanjay wants to plot a bar graph for the given set of values of subject on x-axis and number of students who opted for that subject on y-axis.
Complete the code to perform the following :
(i) To plot the bar graph in statement 1
(ii) To display the graph in statement 2
import matplotlib.pyplot as plt
x=['Hindi', 'English', 'Science', 'SST']
y=[10,20,30,40]
_____________________ Statement 1
_____________________ Statement 2

OR
Mr. Harry wants to draw a line chart using a list of elements named LIST.
Complete the code to perform the following operations:
(i) To plot a line chart using the given LIST,
(ii) To give a y-axis label to the line chart named “Sample
Numbers”.
import matplotlib.pyplot as PLINE
LIST=[10,20,30,40,50,60]
_____________________ Statement 1
_____________________ Statement 2
PLINE.show()

d) Write the output of the following code :
import numpy as np
array1=np.array([10,12,14,16,18,20,22])
array2=np.array([10,12,15,16,12,20,12])
a=(np.where(array1==array2))
print(array1[a])

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