Class 12 Computer Science Notes

Python Revision Tour I : Basics of Python – Notes

Class 12 computer science Python revision tour - I

Class 12 – Computer Science : Python Revision Tour – I [A] – Basics of Python Topics are : INTRODUCTION A python is an object-oriented, interpreted, high-level language and a very powerful programming language. Developed by Guido Van Rossum  in 1991. INSTALLATION Download it from www.python.org  and install your computer by clicking on the installation …

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Python Revision Tour – II : String, Lists, Tuples, Dictionary – Notes

Class 12 Computer Science Python Revision Tour – II Notes String/Text Handling in Python What is a String? Python strings are characters enclosed in quotes of any type – single quotation marks, double quotation marks, triple quotation marks. An Empty string is a string that has 0 characters, i.e. ‘ ’ , “ ”, “““ …

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Working with Functions in Python – Download Note pdf

Function-flow-of-execution

Working with Functions in Python (A Complete Notes) Functions – Introduction Why do we need Functions? It is easy to work with small problems because its solution is also small.  When the problem becomes complex, the size and complexity of the program also increased, and it becomes difficult and cumbersome for a programmer to manage …

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Using Python Libraries – Notes

Using Python Libraries – Notes Using Python libraries: create and import Python libraries. Using libraries: Mathematical, Random, String and Datetime. What is Library? Library refers to the collection of related module(s), which works together to fulfil specific requirements or help us in making any application. The library contains built-in modules (written in C) that provide …

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Data Structure: Stacks – Notes

Python Data Structure Stacks Notes & Important Points Introduction: A data structure is a group of data that have different data types which can be accessed as a unit. It has well-defined operations, properties and behaviours. Data structure is a way of storing and organising information in the computer. General data structure types include array, …

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Data Structure : Searching and Sorting – Notes

The process of placing or rearranging a collection of elements into a particular order is known as sorting. Bubble sort is the simplest sorting algorithm that works by repeatedly swapping the adjacent elements in case they are unordered in n-1 passes. In Selection Sort, the smallest element is selected from the unsorted array and swapped …

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Data Communication – Notes

Data Communication Notes and Important Points • Data communication refers to the exchange of data between two or more networked or connected devices like laptops, PC, printers, routers etc.• Sender, receiver, messages, channel and protocols are major components of data communication.• In data communication, transmission media are the links that carry messages between two or …

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SQL Functions , Grouping Records, Joins in SQL – Notes

SQL Functions – Single Row and Aggregate Group By , Having clause Joins in SQL Functions in SQL Function is used to perform some particular task and it returns zero or more values as a result. Functions can be applied to work on single or multiple records (rows) of a table. Depending on their application …

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