Data Types and Arithmetic

Question 1

Give the data type and description of integers.

Answer 1

int; whole #s

Question 2

Give the data type and description of floating points.

Answer 2

float; any decimal number, 2.3, 4.6, 100.0

Question 3

Give the data type and description of strings.

Answer 3

str; “hello”, ‘Sammy’, “2000”.

Question 4

Give the data type and description of list.

Answer 4

list; Ordered mutable sequence of objects, [ 10, “hello”, 200.3]

Question 5

Give the data type and description of dictionaries.

Answer 5

dict; Unordered key: value pairs: {“mykey”: “value”, “name” : “Frankie”}.

Question 6

Give the data type and description of tuples.

Answer 6

tup; Ordered immutable sequence of objects: (10, “hello”, 200.3).
immutable - unchanging over time or unable to be changed.

Question 7

Give the data type and description of sets.

Answer 7

set; Unordered collection of unique objects: {“a”, “b”}.

Question 8

Give the data type and description of booleans.

Answer 8

bool; Logical value indicating TRUE or FALSE.

Question 9

What operator can be used to find the remainder of a quotient.

Answer 9

Mod operator, %.
Syntax:
In: 7%4
Out: 3

Question 10

Give the syntax of the power operator, say 2 cubed.

Answer 10

Syntax: 2**3.

Question 11

Why is this a false statement 0.1 + 0.2 - 0.3 = 0.0 in python?

Answer 11

This has to do with floating point accuracy and the computer’s abilities to represent numbers in memory.

Question 12

Python is known to have dynamic typing. What does this mean?

Answer 12

A variable can be redefined multiple times with no errors given from python. 
In:    a = 5
In:    a = 10
In:    a + a
Out: 20.

Question 13

Scenario: You want to know what type of data type a variable is. What can be done?

Answer 13

In: type(variable)
Out: type