advanced storage techniques ( arrays , DataFrame)

Farah created a small program in Python that uses NumPy library. She used this library to store his data in a multi-dimensional _______ data structure. This structure allowed her to perform advanced mathematical and scientific calculations in her program.

• list

• dictionary

• array

• pandas

In Python, to import the NumPy library as the name "np", we typically code as:

import numpy as np

Which one of the following would also be valid for importing the NumPy library?

• numpy import as np

• import numpy as npLibrary

• np as import numpy

• import numpy np

Khaled wants to create a NumPy array using a range of values. He has typed and ran the following statement.

import numpy as np

array = np.arange(2, 15, 4)

print(array)

What is the output?

• [ 4 6 8 10 12 14 15 ]

• [ 2154 ]

• [ 0 2 6 10 14 ]

• [ 2 6 10 14 ]

Ahmed wants to store the sportscar data in the order below in a NumPy array.

What is the correct syntax?

• import numpy as np

  sportsCars = np.array([["Ferrari","Lamborghini","McLaren"]])

• import numpy as np

  sportsCars = array.np(["Ferrari","Lamborghini","McLaren"])

• import numpy as np

  sportsCars = array(["Ferrari","Lamborghini","McLaren"])

• import numpy as np

  sportsCars = sportsCars.array(["Ferrari","Lamborghini","McLaren"])

Abdulla created a single dimension NumPy array, as shown below.

What single function should he use to split the array into 6 rows and 2 columns?

• append

• transpose

• hstack

• reshape

Jamila created a NumPy array, as shown below.

What single function should she use to change each of the rows to be a column and each column to a row?

• vstack

• reshape

• transpose

• hstack

What single function should he use to append the arrays, so the final array is as follows?

• vstack

• reshape

• transpose

• hstack

Noora was given all her school’s library book details in a comma-separated values (csv) file. The file was called books.csv , and it contained the title, author, ISBN and date published for each book.

To store the data from the file into a Pandas dataframe, what should Noora type?

• import pandas as pd

  df_books = pd.read_csv("books.csv")

• import pandas as pd

  df_books = pd.to_csv("books.csv")

• import pandas as pd

  df_books = pd.index("books.csv")

• import pandas as pd

  df_books = pd("books.csv")

Abdul has stored the data in a Pandas dataframe called df_results .

To print only Lewis Hamilton’s results, like below, what is the correct code?

• print(df_results.append["Lewis Hamilton"])

• print(df_results.type["Lewis Hamilton"])

• print(df_results.read_csv["Lewis Hamilton"])

  d.

• print(df_results.loc["Lewis Hamilton"])