Python Fundamentals

Question 1

Python Features?

Answer 1

Easy to code
High level language
Case sensitive
OOPS
Portable
Interpreted language

Question 2

Python uses?

Answer 2

AI, Data science, Deep learning, machine learning

Question 3

IDLE?

Answer 3

Integrated development learning environment

Question 4

Name some offline code editors

Answer 4

Jupyter, Spyder, Pycharm, VS code

Question 5

Name some online code editors

Answer 5

Google collab, Github, W3 schools, geek for geeks

Question 6

IDLE modes?

Answer 6

Interactive mode (Difficult to edit) → python shell

Script mode (Difficult to save) → file

Question 7

Python character sets?

Answer 7

Set of valid characters a language can recognize
-+)%$awfa etc

Question 8

Tokens/ Lexical units?

Answer 8

Smallest individual unit in a program

Question 9

Tokens types?

Answer 9

Keywords, literals, operators, identifiers, punctuators

Question 10

Keywords?

Answer 10

convey special meaning, reserved for special purpose. Cant be used as variables. There are 33 such keywords

if else elif etc

Question 11

Identifiers?

Answer 11

Fundamental building blocks of python. User defined.

Question 11

Identifier rules?

Answer 11

Cant contain special characters except ‘_’
Cant use keyword as identifier
First character must be letter( _ counts)
No space in between

Question 12

Literals?

Answer 12

Data items having fixed value

Question 13

Types of literals?

Answer 13

String literals
Numeric literals
Boolean literals
Special case ‘none’
Literal collections

Question 14

Operators?

Answer 14

Tokens that trigger →computation

when applied to variables.

Question 15

Operands?

Answer 15

Variables to which computation is applied

Question 16

Operator Classifications?

Answer 16

→Unary operator (require 1 operand)
→Binary operator (require 2 operand)

Question 17

Operator types?

Answer 17

→arithmetic(+,-/,*,//,%,**)→comparision(>,<)
→assignment(=, +=)
→logical(and, or, not)
→membership(in,notin)
→identity ( is, is not)

Question 18

Punctuators?

Answer 18

Symbols used to organize sentences structures and indicate rhythm
@$!<>, ; etc

Question 19

What are datatypes?

Answer 19

Type of data given to a variable

1)Numerical (int, float, complex)
2)Boolean (True & false)
3)Sequential (strings)
4)Collection(list, tuples)

Question 20

Dictionaries (dict.)?

Answer 20

a=3
print (type(a))
o/p: class <int></int>

Question 21

Strings?

Answer 21

Quotation enclosed sequence of characters.
“a’, “xyz”, ‘abc’

Question 22

How to access character in string?(Indexing)

Answer 22

Indexing:

Hello world
01234 5 678910
str1= “Hello world”
print (str1[10])
o/p → d

Question 23

Indexing specific characters or skipping?

Answer 23

Hello world
01234 5 678910
str1= ‘Hello world”

[Start→Includes index Stop→ Doesn’t include index
Step→ Skipping characters]

Question 24

Mutability?

Answer 24

Data types which can change value in a statement Ex: Lists, dictionaries

Question 25

Immutability?

Answer 25

Data types which cannot change value in a statement Ex: Strings, tuples

Question 26

what are Lists?

Answer 26

Collection of different types of elements within square brackets. They are mutable
L= [‘1’, ‘2”, (“a”,”b”)]

Question 27

what are tuples?

Answer 27

Collection of different types of data within curved brackets. They are immutable

Question 28

Dictionaries?

Answer 28

Collection of key value pair elements within flower brackets They are mutable

Question 29

Dictionary syntax?

Answer 29

D= {<key1>: <value1>,<key2>:<value2>}
D= {'a':1, 'b':2, 'c':3}
print (D['b']) #2</value2></key2></value1></key1>

Question 30

What is type casting?

Answer 30

Conversion of types of data either forcefully or automatically
→Implicit (Automatic)
a=2 ,b=3.4, c= a +b
print (type(c)) #float
→Explicit (Forced)
a=2
print (type(a)) #int
a= float(a)
print (a) #2.0