Lesson Notes, Audio Lessons, Exam Questions
Lesson Notes, Audio Lessons, Exam Questions
See our comprehensive Data Processing and Information Processing resources for all classes. Our lessons are designed to help students understand fundamental ICT concepts, data management techniques, and real-world applications.
This category covers topics essential for WAEC and NECO examinations, ensuring students gain the skills needed for academic and professional success.
Learn the principles of information systems, data organization, computer operations, and the role of technology in everyday life.
Whether you are preparing for exams or simply expanding your knowledge, this subject area will build your competence in today’s digital world.
Study Data Processing and Information Processing across all classes. Learn core concepts, applications, and practical examples to master ICT skills for WAEC and NECO exams.
An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. The operating system is a component of the system software in a computer system. Application programs usually require an…
Anti-virus software is your computer’s best defence against malware (e.g., viruses, Trojan horses, worms, spyware) – install and update anti-virus software on your computer and regularly scan your computer to make sure it is free from malware. Computer safety measures…
There are various means of transmitting information, and the choice of method often depends on the nature of the information, the distance it needs to travel, and the desired speed and reliability of transmission. Here are some common means of…
A chart, also called a graph, is a graphical representation of data, in which “the data is represented by symbols, such as bars in a bar chart, lines in a line chart, or slices in a pie chart”. A chart…
Information processing is the acquisition, recording, organization, retrieval, display and dissemination of information. Information processing could also be referred to as the manipulation of digitalized information by computers and other digital electronic equipment, known collectively as Information technology. A computer…
Internet abuse refers to improper use of the Internet and may include: Internet has so many advantages if it is used positively without caring about any false means and attractive charms of internet. The Internet is producing false trends, especially…
The Internet is the global system of interconnected computer networks that use the Internet protocol suite (TCP/IP) to link billions of devices worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks of local to global scope, linked…
A collection of data or information that has a name, called the filename. Almost all information stored in a computer must be in a file. There are many different types of files: data files, text files ,program files, directory files, and so on. Different types of files store different types of information. For…
SELECT Query Basics Why MS-Access? A number of RDBMS vendors provide a GUI to aid their users in developing queries. These can be particularly helpful to novice users as it enables them to learn the overarching concepts involved in query…
Integrity Constraints over Relations An integrity constraint (IC) is a condition specified on a database schema and restricts the data that can be stored in an instance of the database. If a database instance satisfies all the integrity constraints specifies…
A relational database is a collection of data items organized as a set of formally-described tables from which data can be accessed or reassembled in many different ways without having to reorganize the database tables. The relational database was invented…
The following are some of the prominent computer professional bodies in Nigeria. Nigeria Computer Society (NCS) Institute Of Management Information System. (IMIS) Computer Professional Registration Council of Nigeria (CPN) Information Technology Association of Nigeria (CPN) Nigeria Internet Group (NIG) Nigeria…
Computer personnel are those who assemble, install, repair and operate the computer system. The term equally includes those people who make their living out of the computer industry. They include the following: Database Administrator Software programmer Hardware Engineers System analysts…
There are various ways in which viruses can attack computer system; When you download or open attachment in e-mail message or by instant messaging messages Installing unknown program from unreliable and suspicious looking web sites Illegal duplication of software from…
Computer virus is a software program written with malicious intentions. They are intentionally written by some software developer to cause severe damage for the computer, programs, and data files in which it found itself. A computer virus has the ability…
The Origins of the internet dates back to1960s when the United State funded research projects of its military agencies to build robust, fault-tolerant and distributed computer network. The internet is a global system of interconnected computer network that use the…
A computer network is a system that connects two or more computers together using a communication link. It describes a processing system with a number of independent, relatively low-speed, online, simultaneously usable workstations. In a network, remotely located computer stations…
A Distributed database (DDB) is a collection of multiple, logical interrelated database distributed over a computer network. A Distributed database management system (DDBMS) is the software that manages the DDB and provides an access mechanism that makes this distribution transparent…
Parallel Database improve processing and input/output speeds by using multiple CPU and disks in parallel. A Parallel Database system seeks to improve performance through parallelization of various operations, such as loading data, building indexes and evaluating queries. In Parallel processing,…
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…