Educational Blog - Ajiboye Gbenga @ Sunlite Digital ALBESTA ACADEMY LEKKI

  Introduction to Database Meaning of Database,  Differences Between Data and Information, Advantages of Database Meaning of Database A database is an organized collection of related data stored in a computer system so that it can be easily accessed, managed, and updated. A database helps people keep records properly and find information quickly. Examples of Databases Common examples of databases are: a. School records database b. Hospital database c. Library database d. Bank database e. Student attendance database Differences Between Data and Information Data Information 1. Raw facts and figures e.g 75, A1 Processed and meaningful facts e.g Lagos is a state in Nigeria 2. Not Organized Organized and understandable 3. May not have meaning Has meaning 4. Used as input Used for decision making   Advantages of Database 1. Fast acce...

  Database Management System  Definition, Basic Database Terminologies, Forms of Database Definition of Database and DBMS Database is a collection of related data organized for rapid search and retrieval. It can also be defined as a persistent, logically coherent collection of inherently meaningful data, relevant to some aspects of the real world. DBMS (Data Base Management System) :  DBMS is an application software that controls the data in the database, including overall organization, storage, retrieval, security and data integrity. Examples of DBMS Packages (i) Dbase (ii) Rbase (iii) MS Access (iv) Oracle (v) Paradox (vi) MYSQL Server (vii) SyBase (viii) FOXPRO (ix) IDMS (x) System 2000. (xi) Ingres (xii) Postgres (xiii) NoSQL Basic Database Terminologies (i) Field:  A field is a specific item of information containing a homogenous set of values throughout the table. Fields appear as columns in a table and as cells in a form. (ii) Record:  an individual listi...

 LOGIC GATES/CIRCUITS  1-2 INTRODUCTION/DEFINITION, TYPES, SYMBOLS AND USES Objective:  At the end of the lesson, the students should be able to: 1. Define logic gates 2. State the types of logic gate 3. Draw logic gates symbols 4.State the uses of logic gates DEFINITION OF LOGIC GATES A logic gate is an elementary building block of a digital circuit. M ost logic gates have two inputs and one output. At any given moment, every terminal is in one of the two binary conditions low (0) or high (1), represented by different voltage levels. Types of Standard Single Logic gate There are three types of standard single logic gates. They are: 1. AND gate 2. OR gate 3. NOT gate Alternative Logic Gates are: 4. NAND gate 5. NOR gate 6. EX -OR (Exclusive OR) gate 1.    AND gate :  AND gate will give a high output only if all of the inputs are high. It means multiplication (x). For example if A = 0 and B= 1, A AND B = 0 X 1 = 0 AND GATE SYMBOL 2. OR gate : This  is a...

  THE INTERNET 1   MEANING AND INTERNET TERMINOLOGIES Definition of Internet i. Internet is a worldwide network of computers that share information. ii.The Internet is a global network connecting millions of computers. iii. It is also defined as a global system of interconnected computer networks that use the Internet protocol suite to link devices worldwide. Internet Terminologies 1. Cyber café:  An internet café or cyber café is a place which provides internet access to the public, usually for a fee. 2. Download:  To transfer a file from a remote computer to a local computer. In other words, it means to transfer a file from a web server to a web client. 3. Upload:  To transfer a file from a local computer to a remote computer. In other words, it means to transfer a file from a web client to a web server. 4. E-mail:  An email is mail that is electronically transmitted by your computer. 5. Email Address:  An email address is the name of an electro...

System/Software Development Life Cycle (SDLC)- Definition, Description, Stages, and Diagram Objective: 1. Define System Development Life Cycle 2. List the stages of the System Development Life Cycle 3. Draw SDLC Diagram Definition and Description of System Development Life Cycle   (SDLC) The system development life cycle can be defined as a project management technique that divides complex projects into smaller, more manageable segments or phases. A system development life cycle has three primary objectives: To ensure that high-quality systems are delivered, to provide strong management controls over the projects, and to maximize the productivity of the systems staff. A project is an individual or collaborative enterprise that is carefully planned to achieve a particular aim.   Stages of the System Development Life Cycle (SDLC) The major stages in the system development life cycle are: i. Preliminary study ii. Feasibility study iii. Investigative study i...

  Basic Computer Operation  Booting (Description/Definition), Types of Booting, Components of Windows Desktop, Process of Shutting Down the System Definition of Booting Booting is the process of starting a computer system and loading the operating system into the computer’s memory. When a computer is switched on, it performs checks and prepares the system for use Description of the Booting Process When the computer’s power is first turned on, the CPU (Central Processing Unit) initializes itself to look for the system’s ROM BIOS (Read Only Memory Basic Input Output System) which is the first program that runs every time the computer is turned on. The BIOS performs the Power-On Self-Test (POST), which begins by checking the BIOS chip and then testing CMOS (Complementary Metal Oxide Semiconductor) RAM. If the POST does not detect a battery failure, it then continues to initialize the CPU (Central Processing Unit), checking the hardware devices to ensure they are functioning pro...