datatypes

Select all data types in Python programming language

• integer

• float

• long

• boolen

• string

Answer explanation

Datatype are similar to parts of speech in a language. As we cannot create a sentence without them, we cannot create a program without datatypes.

Select a class to find datatype of a value

• find

• type

• dtype

• what

Answer explanation

a = 1 # interger

type(a) --> integer

Select all example of integer datatype

• 1

• 1.3

• 0

• -1

• True

Select all examples of boolean datatype

• True

• False

• Yes

• No

Define a list?

• List is a variable that stores a collection of values.

  Example: [0, 1.2, 5, True, 'apple']

• List is a variable that have only value.

  Example: 5

Answer explanation

List is a variable where we store multiple values. The values can be of any datatype including a list (nested lists).

Select all valid examples of list

• [1, 2, 3, True]

• [1, 2, 3]

• [True, True, False, False]

• ['it', 'is', 'sunny', 'outside']

Select a class to load a library in python

• load

• import

• get

• fetch

Answer explanation

We use class `import` to load a library in the program.

In the numpy example, we loaded libraries `numpy` and `matplotlib.pyplot` as

import numpy

import matplotlib.pyplot as plt

What is the length of a list: [1, 2, 3]?

• 1

• 2

• 3

• 0

Answer explanation

Length of a list is defined as the number of elements in it. In the example ([1, 2, 3]), we have 3 elements in it, and hence the length.

The function we use to estimate length of a list is `len`

Example: If A = [1, 2, 3] then we can estimate length of A as len(A) that results in 3.

What is the index of first element in a list?

• 1

• -1

• 0

Answer explanation

Python list are zero index meaning

- index of the first element is 0

- index of the second element is 1

- index of the third element is 2

and so on...

What is index of the value `9` in the list, A = [5, 8, 9, 12]

• 5

• 2

• 3

• 1

Answer explanation

In the example, A = [5, 8, 9, 12], the value `9` is in the 3rd place. Since python lists follow zero indexing, the index of it 2.