> என் ராஜபாட்டை : June 2021

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Sunday, June 27, 2021

11 STD - COMPUTER STUDY MATERIALS

 



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12 STD || PYTHON CLASSES AND OBJECTS || PART-3

 

 

 

 

 

 

 

Introduction 


Python is an Object Oriented Programming language. Classes and Objects are the key features of Object Oriented Programming. Th eoretical concepts of classes and objects are very similar to that of C++. But, creation and implementation of classes and objects is very simple in Python compared to C++.


Class is the main building block in Python. Object is a collection of data and function that act on those data. Class is a template for the object. According to the concept of Object Oriented Programming, objects are also called as instances of a class or class variable. In Python, everything is an object. For example, all integer variables that we use in our program is an object of class int. Similarly all string variables are also object of class string.

 

 

 

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12 STD || PYTHON CLASSES AND OBJECTS || PART-3

 

 

 

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12 STD || PYTHON CLASSES AND OBJECTS || PART-2

 

 

 

 

 

 

 

Introduction 


Python is an Object Oriented Programming language. Classes and Objects are the key features of Object Oriented Programming. Th eoretical concepts of classes and objects are very similar to that of C++. But, creation and implementation of classes and objects is very simple in Python compared to C++.


Class is the main building block in Python. Object is a collection of data and function that act on those data. Class is a template for the object. According to the concept of Object Oriented Programming, objects are also called as instances of a class or class variable. In Python, everything is an object. For example, all integer variables that we use in our program is an object of class int. Similarly all string variables are also object of class string.

 

 

 

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12 STD || PYTHON CLASSES AND OBJECTS || PART-2

 

 

 

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12 STD || PYTHON CLASSES AND OBJECTS || PART-1

 

 

 

 

 

 

 

Introduction 


Python is an Object Oriented Programming language. Classes and Objects are the key features of Object Oriented Programming. Th eoretical concepts of classes and objects are very similar to that of C++. But, creation and implementation of classes and objects is very simple in Python compared to C++.


Class is the main building block in Python. Object is a collection of data and function that act on those data. Class is a template for the object. According to the concept of Object Oriented Programming, objects are also called as instances of a class or class variable. In Python, everything is an object. For example, all integer variables that we use in our program is an object of class int. Similarly all string variables are also object of class string.

 

 

 

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12 STD || PYTHON CLASSES AND OBJECTS || PART-1

 

 

 

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Saturday, June 26, 2021

11 STD || CHP: 3 || Computer Organization || Part-3 ||PORT AND INTERFACE


 

 


 

 

 

The Motherboard of a computer has many I/O sockets that are connected to the ports and interfaces found on the rear side of a computer . The external devices can be connected to the ports and interfaces. The various types of ports are given below

 

 Serial Port: To connect the external devices, found in old computers.


Parallel Port: To connect the printers, found in old computers.


USB Ports: To connect external devices like cameras, scanners, mobile phones, external hard disks and printers to the computer.


USB 3.0 is the third major version of the Universal Serial Bus (USB) standard to connect computers with other electronic gadgets 

. USB 3.0 can transfer data up to 5 Giga byte/second.


USB3.1 and USB 3.2 are also released.

 

 

 

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11 STD || CHP: 3 || Computer Organization || Part-3 ||PORT AND INTERFACE 



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11 STD || CHP: 3 || Computer Organization || Part-2 || . Data communication between CPU and memory

 

 


 

 

A bus is a collection of wires used for communication between the internal components of a computer.


The word in the RAM has the same size (no. of bits) as the Memory Data Register (MDR). If the processor is an 8-bit processor like Intel 8085, its MDR and the word in the RAM both have 8 bits.


The read operation transfers the data(bits) from word to Memory Data Register. The write operation transfers the data(bits) from Memory Data Register to word.

 

 

 

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11 STD || CHP: 3 || Computer Organization || Part-2 || . Data communication between CPU and memory

 

 

 

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11 STD || CHP: 3 || Computer Organization || Part-1|| Characteristics of Microprocessors

 

 


 

 

 Basics of Microprocessors


The CPU is the major component of a computer, which performs all tasks. This is realized by the microprocessor which is an Integrated Circuit. Microprocessors were first introduced in early 1970s. The first general purpose microprocessor, 4004 was developed by Intel Inc. The microprocessor is a programmable multipurpose silicon chip. It is driven by clock pulses. It accepts input as a binary data and after processing, it provides the output data as per the instructions stored in the memory. A block diagram of a microprocessor based system

 

 

 

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11 STD || CHP: 3 || Computer Organization || Part-1|| Characteristics of Microprocessors

 

 

 

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12-STD || CH 9- Connecting PHP and MYSQL || CA

 

 


 

 

Connecting PHP and MySQL


Data is important in computer and Internet related applications. Numerous growths of data need a secure and convenient environment to store and manipulate autonomously. All these features are available in Relational Database Management System (RDMS) such as MySQL, Oracle, IBM DB2, and Microsoft SQLSERVER etc. These databases are connected with Programing language and perform major operations like INSERT, SELECT, UPDATE and DELETE using Structured query language (SQL). The combination of PHP and MySQL has become very popular server side web scripting language in Internet.

 

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12-STD || CH 9- Connecting PHP and MYSQL || CA

 

 

 

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Wednesday, June 23, 2021

12 STD - REVISION -1 - STUDY MATERIALS FOR COMPUTER

 




STUDY MATERIALS ....



COMPUTER SCIENCE










STUDY MATERIALS ....

 

 

COMPUTER APPLICATION

 

 

 

 


Sunday, June 20, 2021

DOWNLOAD 2021-22 NEW TEXTBOOK FOR ALL CLASS

 

The latest new syllabus books are available at the Tamilnadu Text Book Corporation website. You can download the new Samacheer books from the official website or from here.

 

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11 STD || BOOTING & TYPES OF BOOTING || CHAP : 1 || COMPUTER


 



Booting of computer


An Operating system (OS) is a basic software that makes the computer to work. When a computer is switched on, there is no information in its RAM.At the same time, in ROM, the pre-written program called POST (Power on Self Test) will be executed first. This program checks if the devices like RAM, keyboard, etc., are connected properly and ready to operate. If these devices are ready, then the BIOS (Basic Input Output System) gets executed. This process is called Booting. Thereafter, a program called “Bootstrap Loader” transfers OS from hard disk into main memory. Now the OS gets loaded (Windows/Linux, etc.,) and will get executed. Booting process is of two types.


1) Cold Booting


2) Warm Booting


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11 STD || BOOTING & TYPES OF BOOTING || CHAP : 1 || COMPUTER




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11 STD || BOOTING & TYPES OF BOOTING || CHAP : 1 || COMPUTER






Wednesday, June 16, 2021

12 STD || CA || CH: 8 || Forms and Files

 


 

 

HTML Forms


Main objective of PHP and HTML form controls are to collect data from users. In the web development, user access website or web pages from remote client machine and feed the data to server. These data are collected via HTML form controls like textbox, dropdown box and radio button etc., and sent to server using server side

programming like PHP.  

 

 

 

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 12 STD || CA || CH: 8 || Forms and Files

 

 

 

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12 STD || PART-5 || CH: 9 || DICTIONARY || LISTS, TUPLES, SETS AND DICTIONARY

 



Introduction


In python, a dictionary is a mixed collection of elements. Unlike other collection data types such as a list or tuple, the dictionary type stores a key along with its element. The keys in a Python dictionary is separated by a colon ( : ) while the commas work as a separator for the elements. The key value pairs are enclosed with curly braces { }.



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12 STD || PART-5 ||  CH: 9 || DICTIONARY ||  LISTS, TUPLES, SETS AND DICTIONARY





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12 STD || PART-5 ||  CH: 9 || DICTIONARY ||  LISTS, TUPLES, SETS AND DICTIONARY

12 STD || PART - 4 || CH-9 - Lists, Tuples, Sets and Dictionary || Sets

 

 


 

 

Introduction

In python, a set is another type of collection data type. A Set is a mutable and an unordered collection of elements without duplicates. That means the elements within a set cannot be repeated. This feature used to include membership testing and eliminating duplicate elements
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11 STD || INPUT DEVICE || CH: 1

 





Input Devices:

(1) Keyboard: Keyboard (wired / wireless, virtual) is the most common input device used today. The individual keys for letters, numbers and special characters are collectively known as character keys. This keyboard layout is derived from the keyboard of original typewriter. The data and instructions are given as input to the computer by typing on the keyboard. Apart from alphabet and numeric keys, it also has Function keys for performing different functions. There are different set of keys available in the keyboard such as character keys, modifier keys, system and GUI keys, enter and editing keys, function keys, navigation keys, numeric keypad and lock keys.

 

 

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 11 STD || INPUT DEVICE || CH: 1

 

 

 

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 11 STD || INPUT DEVICE || CH: 1

 

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Saturday, June 12, 2021

மனிதனும் மர்மங்களும் - மதன்

 



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Pandiyan Bavani

 

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CHAPTER 1 STUDY MATERIALS FOR BOTH COMPUTER SCIENCE AND APPLICATION

 



CHAPTER 1 STUDY MATERIALS FOR BOTH COMPUTER SCIENCE AND APPLICATION



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CHAPTER 1 STUDY MATERIALS

 

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11_STD_COMPUTER_SCIENCE_STUDY_MATERIAL 

 




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Sunday, June 6, 2021

11 STD || PART-2 || Chp: 1 || Basic Components of Computer || Computer

 

 


 

 

 

Components of a Computer

The computer is the combination of hardware and 

software. Hardware is the physical component of a computer like motherboard, memory devices, monitor, keyboard etc., while software is the set of  programs or instructions. Both hardware and software together make the computer system to function Let us first have a look at the functional components of a computer. Every task given to a computer follows an Input- Process- Output Cycle (IPO cycle). It needs certain input, processes that input and produces the desired output. The input unit takes the input, the central processing unit does the processing of data and the output unit produces the output. The memory unit holds the data and instructions during the processing.

 

 

 

 

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11 STD || Chp: 1 || Basic Components of Computer || Computer

 

 

 

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11 STD || Chp: 1 || Basic Components of Computer || Computer

11 STD || PART-1 || Generation of Computer || Chap: 1 || Computer Science

 

 


 

 

Introduction to Computers:

 

 Computers are seen everywhere around us, in all spheres of life, in the field of education, research, travel and tourism, weather forecasting, social networking, e-commerce etc. Computers have now become an indispensable part of our lives. Computers have revolutionised our lives with their accuracy and speed of performing a job, it is truly remarkable. Today, no organisation can function without a computer. In fact, various organisations have become paperless. Computers have evolved over the years from a simple calculating device to high speed portable computers 

 

 

 

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11 STD || Generation of Computer || Chap: 1 || Computer Science

 

 

 

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11 STD || Generation of Computer || Chap: 1 || Computer Science

12 STD || CA || CH: 7 || Looping Structure

 


Looping Structure:


Looping Structures are useful for writing iteration logics. It is the most important feature of many programming languages, including PHP. They are implemented using the following categories.  for Loop structure and flow chart


●● for Loop


●● foreach Loop


●● While Loop


●● Do While Loop

 

 

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12 STD || CA || CH: 7 || Looping Structure

 

 

 

 

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12 STD || CA || CH: 7 || Looping Structure

 

12 STD || PART - 3 || CH-9 - Lists, Tuples, Sets and Dictionary || TUPLES ||

 

 

 


 

 Advantages of Tuples over list


1. The elements of a list are changeable (mutable) whereas the elements of a tuple are unchangeable (immutable), this is the key difference between tuples and list.


2. The elements of a list are enclosed within square brackets. But, the elements of a tuple are enclosed by paranthesis.


3. Iterating tuples is faster than list. 

 

 

 

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12 STD || CH-9 - Lists, Tuples, Sets and Dictionary || TUPLES || PART - 3

 

 

 

 

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12 STD || CH-9 - Lists, Tuples, Sets and Dictionary || TUPLES || PART - 3