Forem: bhuvaneswari nandhagopal

VON NEUMAN ARCHITECTURE

bhuvaneswari nandhagopal — Mon, 25 May 2026 09:26:20 +0000

What is Von Neuman Architecture?
The Von Neuman Architecture is a computer design model proposed by John Von Neuman
It is describe how a computer store and processed data using the same memory for
1. Data
2. Instructions(programs)
In the same memory this is called the stored program concept.

Von Neuman Architecture - flow chat:

Input unit: i)Transmits data & instructions from the out side world to machine. ii)It is operated by control unit.

Examples of Input Units

Common input units include:

Keyboard:
For typing text and commands.
Mouse:
For pointing, selecting, and navigating on-screen elements.

Scanner:
Converts physical documents into digital form.
Microphone:
Captures audio input.

Touchscreens and stylus pens:
Enable direct interaction with the display.

Memory unit: Used to store data and programs.

Functions:
i) Store input data
ii) Store processing results

Arithmetic Logic Unit: Performs arithmetic and logical operations.

Arithmetic Operation:
Addition(+), Subtraction(-), Multiplication(*), Division(/)

Logical Operations:
And, Or, Not, Comparison

Control Unit(cl): Controls all parts of computer.

Functions:
Fetcher instruction, decodes instructions, excutes instructions.

Output Unit: Displays the processed result to the user.

Examples:
Monitor, printer, speaker.

Registers: Register are very small and very fast memory location inside(CPU).

Work:
i) Store temporary data
ii) Help CPU process data quickly

Examples Of Registers:
i) Program Counter(pc)
ii) Instruction Register(IR)
iii) Memory Address Register(MAR)

INTRODUCTION TO PYTHON

bhuvaneswari nandhagopal — Sun, 24 May 2026 15:21:48 +0000

What is python?
Python is general purpose high level programing language.

Who created python?
GUIDO VAN ROSSUM create python. He started developing python in 1989, and the FIRST PUBLIC RELEUSE came in 1991.

Python is multiple paradigm programing language.
Types of multi-paradigm:

Type: Meaning:

Object-Oriented - Program using objects and classes
Procedural - Program written step by step
Functional - Program using functions
Structured - Program written in an organized way
Reflective - Program can check itself

USES OF PYTHON:
TYPES:

Wep Application:
A web application is a software program that runs on a remote server and is accessed through a web browser over the internet. Unlike traditional desktop applications, it doesn’t require installation — users simply open a browser like Chrome, Safari, or Firefox and interact with the app online.
Mobile Application:
A mobile application (or mobile app) is a type of software application specifically designed to run on mobile devices such as smartphones and tablets. Unlike web applications that run in web browsers or desktop applications used on desktop computers, mobile apps are tailored to the unique capabilities and constraints of mobile devices.
GAMES:
Python, a game is simply a program that uses Python code to create interactive entertainment — usually involving graphics, sound, and user input.
DATABASE(DB):

In Python, "DB" typically refers to database management and interaction, allowing developers to connect to, query, and manipulate data in various database systems.

What is a Database?

A database is an organized collection of data that can be easily accessed, managed, and updated. In Python, databases can be categorized into two main types:

Relational Databases (RDBMS):

These store data in structured tables with rows and columns, supporting relationships between data entities. Examples include MySQL, PostgreSQL, and SQLite.

Non-relational Databases (NoSQL):
These store data in various formats such as documents, key-value pairs, or graphs, offering more flexibility. Examples include MongoDB and Redis

DATA ANALYSIS AND DATA SCIENCE:

DA stands for Data Analyst, focusing on analyzing and visualizing data, while DS stands for Data Scientist, specializing in advanced analytics, predictive modeling, and machine learning.

INTERNET OF THINGS:

The Internet of Things (IoT) is a network of physical devices embedded with sensors, software, and connectivity that allows them to collect, exchange, and act on data autonomously.

ARTIFICIAL INTELLIGENCE(AI):

AI (Artificial Intelligence) in Python means using Python programming language to create smart programs that can think, learn, and make decisions like humans.

AI = making computers intelligent
Python = a programming language used to build AI applications

references:

chatgpt.com

loops

bhuvaneswari nandhagopal — Fri, 22 May 2026 14:54:38 +0000

INTRODUCTION TO LOOP:

A loop is used to repeat the same code many times.
We use loops for repeated work in programming.

TYPES OF LOOP

for loop
while loop

FOR LOOP:

Used to repeat code a fixed number of times.
Mostly used with range or collection.

what is range?

Used to create a sequence of numbers.
Mostly used in loops.

what is collection?

Collection is a data type used to store multiple values in a single variable.

WHILE LOOP:

A while loop is used to repeat code again and again while the condition is true

Simple Explanation:

i = 1 → start value
i <= 5 → condition
print number
increase i by 1
repeat until condition becomes false

comparision operator

bhuvaneswari nandhagopal — Mon, 18 May 2026 10:28:18 +0000

A comparison operator is a symbol or set of symbols used in programming to compare two values or expressions. The result of this comparison is a Boolean value: either True or False. These operators are essential for decision-making in conditional statements, loops, and other logical constructs.

1.Equal to (==): checks if two values are equal.

x = 5
y = 10
print(x == y) # Output: False

2.Not equal to (!=): checks if two values are not equal.

print(x != y) # Output: True

3.Greater than (>): Checks if the left value is greater than the right value.

print(x > y) # Output: False

4.Less than (<): Checks if the left value is less than the right value.

print(x < y) # Output: True

5.Greater than or equal to (>=): Checks if the left value is greater than or equal to the right value.

x = 5
y = 5
print(x >= y) # Output: True

6.Less than or equal to (<=): Checks if the left value is less than or equal to the right value.

print(x <= y) # Output: True

Importance in Programming

Comparison operators are fundamental for controlling the flow of a program. They are used in if-else statements, loops, and other logical constructs to evaluate conditions and make decisions.

example:

if x < y:
print("x is less than y")
else:
print("x is not less than y")