Data Processing/Information Processing

Data Processing (secondary)

CRASH RECOVERY

Crash recovery is the process by which the database is moved back to a consistent and usable state. This is done by rolling back incomplete transactions and completing committed transactions that were still in memory when the crash occurred. When the database is in a consistent and usable state, it has attained what is known […]

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Data Processing (secondary)

DATABASE SECURITY

DEFINITION OF DATA SECURITY Data security is the practice of keeping data protected from corruption and unauthorized access. The focus behind data security is to ensure privacy while protecting personal or corporate data.   It is a means of putting in place the different form of information security controls to protect database against compromise of

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Data Processing (secondary)

MAINTENANCE OF COMPUTER II

Maintenance is highly essential in order to prolong its contributing functionality. SOFTWARE MAINTENANCE The maintenance of programs inside the computer system such as virus, a spyware removal, back up software and a registry removal, cleaner. Every PC should be installed with an anti virus, a spyware removal application back up and a registry cleanser. Some

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Data Processing (secondary)

MAINTENANCE OF COMPUTER HARDWARE I

Maintenance of computer hardware is a way of taking care, repairing and replacing broken and failing computer hardware. Maintenance is necessary on computer to avoid hardware failure or loosing valuable information and most times, hardware breaks without notice. Excess heat accelerates the deterioration of the delicate circuits in the system. Dust and dirt are the

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Data Processing (secondary)

DENSE VERSUS SPARSE INDEXES

DENSE INDEX This is said to be dense if it contains (at least) one data entry for every search key value that appears in a record in the indexed file. In a dense index, index record appears for every search key value in the file or table. That is every search key in the index

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Data Processing (secondary)

INDEXES

An Index is a copy of database table that has been reduced to certain fields and the copy is always in sorted form. The index also contains a pointer to the corresponding record of the actual table so that the fields not contained in the index can also be read. Index contains a value and

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Data Processing (secondary)

SS 3 Data Processing Revision

DEFINITION OF DATA MODEL Is the process of structuring and organizing data.   TYPES OF DATA MODELS (1) Flat (2) Hierarchical (3) Network (4) Relational (5) Object-Relational and (6)Star Schema   SIGNIFICANCE OF DATA MODEL (1) A well-developed data model can foster improved understanding of the organization (2) Data model helps in structuring and organizing

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Computer-Studies

APPLICATION SOFTWARE – Full Explanation

Application Software These refer to the program used to solve a particular type of problem or variety of similar problems. Mostly, application programs are produced by an organisation for its specific tasks. Types of application software There are two major types of application software. These are: Users’ Application Program Application Package Users’ Application Programs: These

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Computer-Studies

ART OF INFORMATION PROCESSING – COMPREHENSIVE EXPLANATION

ART OF INFORMATION PROCESSING – CPMPREHENSIVE Art of Information processing can be defined as a series of actions or operations that convert data into useful information. It is the act of gathering, manipulating, storing, retrieval and classifying recorded information. Art of information processing is the acquisition, recording, organisation, retrieval, display and dissemination of information. Data

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Computer-Studies

COMPUTER HARDWARE & SOFTWARE

COMPUTER HARDWARE & SOFTWARE HARDWARE Computer hardware is generally used to describe all the electronic and mechanical elements of a computer system. It includes the physical equipment in a computer system e.g. cable, mother board, the processor, monitor, speaker etc. In otherwords, hardware is all the physical parts of a computer system that can be

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Computer-Studies

OVERVIEW OF COMPUTER SYSTEM

DEFINITION OF COMPUTER Computer can be defined as a programmable machine which can accept data through an input device, process the data accepted with pre-defined instruction and present the result through an output device in a desired form.   A Computer is an electronic device that can accept data, store data and processed data to

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teacher and students in classroom

The Educator’s Guide To Using Video In Teaching And Learning

The Educator’s Guide To Using Video In Teaching And Learning During the recent COVID pandemic, the education industry went through a major paradigm shift. Classroom lectures were not feasible considering the risk factors during the COVID pandemic. It is why the education industry started using online channels to continue its operations.  Also, online learning platforms

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Computer-Studies

COMPUTER GRAPHICS PACKAGE

COMPUTER GRAPHICS PACKAGE A graphic is a digital representation of drawing, chart or photographs. It can also be called a picture or image which contains no motion or animation. Graphic package is an application that can be used to create and manipulate images on a computer.   Computer graphics are used in many applications including

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Computer-Studies

MICROSOFT POWERPOINT

What is Microsoft Power Point? Microsoft PowerPoint is a presentation program that is incorporated in Microsoft Office suite package. It offers word processing, outlining drawing, graphing and presentation management tools   Starting a presentation with Microsoft PowerPoint There are two ways of starting Microsoft PowerPoint Click on start button, choose All Programs and click PowerPoint

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Computer-Studies

PRESENTATION PACKAGE

PRESENTATION PACKAGE – FULL EXPLANATION What is presentation package?  A presentation package is a software package used to display information in the form of a slide show. It provides the resources necessary to give a professional presentation for meetings, lectures, speeches or other similar situations. It enables graphic images to be inserted and manipulated in

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Computer-Studies

INTERNET – WELL EXPLAINED

INTERNET – WELL EXPLAINED What is internet? Internet or simply “The Net” is a worldwide system of computer networks in which used at any one computer can, if given permission or access, get information from any other computer. It is the largest connected of millions of computers connected to thousands of different networks worldwide.  

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Computer-Studies

FILE ORGANISATION

FILE ORGANISATION File organisation refers to the way in which data is stored in a file and the methods by which it can be accessed. Database is stored as a collection of files. Each file is a sequence of records. A record is a sequence of fields. Data is usually stored in the form of

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