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Showing posts from May, 2026

Numeric

Question 1 Solve: $10 + 10 \times 100 \div 10$ 200 110 10 20 110 Answer: Explanation: According to the BODMAS rule, division is performed first: $100 \div 10 = 10$. Next, we perform multiplication: $10 \times 10 = 100$. Finally, the addition is performed: $10 + 100 = 110$. Question 2 Solve: $10 + 10 \div 100 \times 10$ 2 10 1001/100 11 11 ...
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Computer Security Fundamentals

Computer Security Fundamentals Introduction to Computer Security Definition : Computer security, also known as Cyber Security or IT Security , is a branch of Information Technology dedicated to protecting computers. Purpose : Its primary goal is to protect computer systems, data, and information from unauthorized access, misuse, and malicious software (like viruses). Methods to Provide Security To secure computer systems and data, four main control methods are utilized: Security Method Description 1. System Access Control Allows or restricts the use and modification of data. When a user logs in, the system determines what data is accessible based on their User ID. 2. Data Access Control Monitors who can control specific data. It creates access rules based on the security levels of specific individuals, files, and objects. 3. System & Security Administration Executes offline processes to either establish strict security protocols for a system or purposefull...
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Internet and Its Services

Internet and Its Services 1. Introduction to the Internet Definition : The Internet stands for "International Network." It is a global "network of networks" consisting of millions of private and public local-to-global networks. Network Concept : A network is generally a group formed by connecting two or more computer systems together. Father of the Internet : Vint Cerf, who started it in the year 1950. How it Works (Protocols) : Data available on the internet is controlled by protocols. TCP/IP : This protocol is used by all computers on the internet to communicate. It divides a file into several smaller parts using a file server, which are known as "packets" . 2. History of the Internet 1969 - ARPANET : The Advanced Research Projects Agency Network (ARPANET) was launched. It connected the University of California (Los Angeles) and the University of Utah. Objective : To connect computers of various universities and the American Defense Depart...
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DATA COMMUNICATION AND NETWORKING

DATA COMMUNICATION AND NETWORKING 1. Introduction to Data Communication Data Communication is the process of exchanging information, instructions, and data from one computer to another. It involves the transfer of digital or analog data between two or more computers connected via a communication channel. Data is transmitted from one place to another in the form of signals . Types of Signals Data can be exchanged using three main types of signals: Digital Signals: Data is exchanged in an electronic format using binary numbers ( 0 and 1 ). Analog Signals: Data is exchanged in the form of radio waves (e.g., used in telephone lines). Hybrid Signals: These contain the properties of both analog and digital signals combined. 2. Types of Communication Channels A communication channel determines the direction of data flow between a sender and a receiver. There are three types of communication channels: Channel Type Direction of Data Flow Key Characteristics Examples ...
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Database Concepts

Database Concepts 1. Introduction to Databases What is a Database? A database is an organized collection of data or information. It allows users to easily retrieve, search, and manage information whenever required because data is stored in a predefined and structured manner. Core Functions of a Database A well-structured database provides facilities to: Retrieve required information easily. Take appropriate actions or make decisions based on the stored data. Reorganize information according to new requirements. Generate reports and extract new insights based on the data. 2. Key Concepts: Data vs. Information It is important to understand the difference between raw data and meaningful information. Feature Data Information Definition Facts or details about any object, person, or group. Data that has been processed, organized, and structured to make it meaningful and useful. Nature Raw, unorganized facts. Refers to stored values in a database. Processed d...
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MICROSOFT OFFICE & MS WORD

MICROSOFT OFFICE & MS WORD 1. Microsoft Office (MS-Office) Basics Microsoft Office is a popular software package created by assembling various types of software meant primarily for office and school environments. Invented By: Microsoft Company (USA). Invention Year: 1988. First Edition Released: 1990. Initial Software Included: MS-Word, MS-PowerPoint, and MS-Excel. Later Additions: MS-Access (Database), MS-Picture Manager, Spell Checker, VBA Scripting Language, and MS-Outlook. Mobile Versions: A mobile version named MS-OFFICE Mobile is available for Android, iPhone, and Windows phones. Classification of MS-Office Software Packages The five major software applications included in MS-Office are classified as follows: Software Name Type of Software Primary Purpose MS-Word Word Processing Software Creating and editing documents. MS-Excel Tabular Data Formatting Software Managing tabular data and calculations. MS-PowerPoint Presentation Software C...
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