Programming 2

Question 1

can you combine strings and numbers in python ?

Answer 1

you cant do it directly unless u add str before the number

eg : (“yoyo” + str(123))

Question 2

Where should normal arguements be placed ?

Answer 2

Normal arguements should be placed before variable arguements , ALWAYS

Question 3

What is the special case called where you add another statement apart from “if” and “else” statements

Answer 3

“elif” statements are used , these statements allow us to add more than one condition

Question 4

Collection

Answer 4

grouping multiple items tgt and storing them in a single name (variable)

Question 5

List

Answer 5

groups pieces of data tgt in a certain order and assigns the collection a name

Question 6

Should you add comma at the end of a list/array ?

Answer 6

Yes

Question 6

Mutable & Immutable values

Answer 6

• mutable = values that can be changed after their created
• immutable = values that cant be changed once created

Question 7

Iteration

Answer 7

repeats the same procedure multiple times until it ends

• loop is a code that iterates

Question 8

Module

Answer 8

Python file that contains code, like variable or functions

Question 9

Python Libraries

Answer 9

1. machine learning tasks
   * TensorFlow
   * pandas
2. Math stuff
   * Numpy
   * Scipy

Question 10

Python Frameworks

Answer 10

used for web development management

• Django
• Flask

Question 11

Concatenate

Answer 11

combine multiple strings into one string

Question 12

Slicing

Answer 12

getting part of a string value

string[start:end]

Question 13

String methods

(making changes/finding strings etc)

Answer 13

newstringname.stringname.methodname()

• the new string name is the new name u give the string
• the stringname is the string that u want to add the function or wtv to
• the “.” is used to tell python that a method/change is coming next
• method name is what u wanna do to the string
• always end with ()

Question 14

Regular Expression

Answer 14

aka Regex

Allows you to create a description of a pttern that you want to match

Question 15

6 ways to make a description of patterns you want using regular expressions

Answer 15

1. /content\ : enclose in slashes for specific content
2. \d : indicates digits that your looking for
3. \w : indicates words that your looking for
4. . : indicates any character
5. • : to indicate 1 or more occurences of the preceding pattern
6. • : indicates zero or more occurences of the preceding pattern*
7. ? : indicates zero or one occurences of the preceding pattern

Question 16

Class

Answer 16

describes the type of attributes and behaviours an object can have

Question 17

Memory Management

Answer 17

code that decides what kept in memory and whats not

alternatively u can use garbage collection - automated memory management process which clears unnecessary items

Question 18

Algorithm

Answer 18

set of instructions that are used to describe the exact result

Question 19

Memory Allocation types

Answer 19

• Static : compile time, before the execution of the program
• Dynamic : runtime happens during executin of the program

Question 20

Deallocation

Answer 20

disposes of memory when its no longer useful

Question 21

Manual Memory Management and Automatic Memory Management

Answer 21

• MMM - developers have to write code to allocate and deallocate memory
• AMM - allocating and deallocating of memory is done automatically by the program

Question 22

Stack, Stack overflow, Call stack

Answer 22

variables created by other functions are stored by stacks, when functions call other functions , it stores memory temporarily by creating new stack record

stacks hv max no of records, record hv a max limit

• Stack : special data type that follows last in first out principle
• Stack overflow : when the data exceeds the max limit of records
• Call stack : order of the functions

Question 23

Interpreters and Compilers

Answer 23

• Interpreters - translate line by line and execute instructions
• Compilers - take the whole file and turn it into machine code

Question 24

bytecode

Answer 24

the codes that get interpreted line by line

Question 25

what takes up more space, int or float values ?

Answer 25

• float values bc of the point, it has to store memore in 2 diff places , one place is before the point and one is after the point