# [Type B] Chapter– 8 Class 12 CS – Sumita Arora Assignment | Q/A

Here is class 12 computer science Unit 8 [Type B] solutions for Sumita Arora back exercise assignment. Below includes both textual and video solutions wherever required. View all the answers in assignment for chapter 8 and for all chapters here.

Watch all tutorials for chapter 8.

Q1: Consider the code below:

### Solution:

Q2: Execute the following codes and find out what happens? (Libraries have been imported already : plt is the alias name for matplotlib.pyplot)

### Solution:

```(a) No error
(b) No error
(c) The code will execute with no error but it will have an improper visualization due to the wrong value as parameter passed on.```
Q3: Add titles for the X-axis, Y-axis and for the whole chart in above codes.
```(a)
A = np.arange(2, 20, 2)
B = np.log(A)
plt.plot(A, B)
plt.title('log')
plt.xlabel("X axis")
plt.ylabel("Y axis")
plt.show()

(b)
A = np.arange(2, 20, 2)
B = np.log(A)
plt.bar(A, B)
plt.title('log')
plt.xlabel("X axis")
plt.ylabel("Y axis")
plt.show()
```
Q4: plt.plot(A,B) produces (A and B are the sequences same as created in question 2) chart as:

### Solution:

```import matplotlib.pyplot as plt
import numpy as np

# code for A vs B's every value*1.2

A = np.arange(2, 20, 2)
B = np.log(A)
B1 = B*1.2
plt.plot(A, B)
plt.plot(A, B1)
plt.show()

# code for A vs B's every value*-1.2

A = np.arange(2, 20, 2)
B = np.log(A)
B1 = B*-1.2
plt.plot(A, B)
plt.plot(A, B1)
plt.show()
```
Q5: Why is following command producing error? (plt is the alias name of imported library matplotlib.pyplot and A is an ndarray created in question 2)

plt.pie(A, A+2, A+3, A+4)
```Improper argument passed is the cause of error while plt.pie() requires different argument.

ValueError: Invalid RGBA argument: 6```

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