Data Visualization Assessment

What is the reason for Numpy Array being better than Python List?

• Can save different data types in the same list

• Stores data in sequence hence faster

• Needed to be imported

• Option 1 and 2 both

What does this code will do:

np.arange(6).reshape((2,3))

• Arrange six numbers among 2 and 3

• Make a matrix from 0 to 5 with 2 rows and 3 columns

• Make a matrix from 1 to 6 with 2 rows and 3 columns

• Make a matrix from 0 to 5 with 3 rows and 2 columns

For slicing a numpy array which one is correct:

• x[start:stop:step]

• x[start:step]

• x[step:start]

• x[stop:start:step]

By what code we can see the first five rows when movies_df is data frame :

• movies_df.head()

• movies_df.tail()

• movies_df.info()

• movies_df.shape

The use of .loc and .iloc is:

• locates by name and locates by numerical index

• locates by numerical index and locates by name

• Both 1 and 2

• None of these

What does inplace=True do in pandas?

• Modifies source data temporarily to show copy of project

• Modifies source data permanently

• None of these

• Both 1 and 2

What is isin() in Pandas?

• It is a mathematical function

• It checks if the row is in dataframe.

• It checks if the given value is in that column or not

• None of these

What is the technique of removing null values with non-null valuable values?

• Correlation

• Drop nulls

• Mean

• Imputation

How do we import matplotlib with plt as it short name to use ?

• import matplotlib plt

• import plt

• import matplotlib.pyplot as plt

• import pyplot

What is function of:

plt.plot([1,2,3,4],[5,6,7,8])

• Make a line graph with the first list at the x-axis and the other at the y-axis

• Make a line graph with the first list at the y-axis and the other at x-axis

• Make a bar graph with the first list at the y-axis and the other at x-axis

• None of these