Python - For data science

Question 1

What are Jupyter notebooks?

Answer 1

workspaces for interactively developing data science code

Question 2

What do Jupyter notebooks consist of?

Answer 2

sequential cells, the bracketed numbers indicate the order in which the cells have been executed

Question 3

How are datasets stored?

Answer 3

In CSV files (these store tables in plain text format, commas are used to separate text in the table)

Question 4

What is pandas?

Answer 4

A library for data analysis

Question 5

What is a python library?

Answer 5

Collections of pre-written code and functions

Question 6

How do you import the python library pandas?

Answer 6

import pandas as pd

Question 7

How do you import a CVS?

Answer 7

df = pd.read_csv(‘dataset.csv’)

Question 8

How do you preview a CVS?

Answer 8

df.head()

Question 9

How do you view the data types in a data frame?

Answer 9

df.dtypes

Question 10

int64

Answer 10

integers

Question 11

float64

Answer 11

decimals

Question 12

object

Answer 12

text

Question 13

What does it mean if data is categorical?

Answer 13

It comes from a small set of predetermined values

Question 14

What are variables used for in python?

Answer 14

To store data

Question 15

How do you define a variable with a value?

Answer 15

variable = value
(eg. months = 12 )

Question 16

What is a boolean variable?

Answer 16

A variable that equals True or False (without quotation)

Question 17

Python code is run from…

Answer 17

Top to bottom (After both lines are run the variable takes the bottom value)

Question 18

How do you reassign a variable in Python?

Answer 18

Write a line of code under the previous line of code

Question 19

In Python where do you start counting entries from?

Answer 19

0

Question 20

How do you add entries to a list?

Answer 20

list_name.append(new_entry)