It is a technology that allows users to access resources that are in a remote location. The technology allows the use of computing infrastructure over the internet (cloud) or network. The infrastructure can include hardware, software, data, process, servers, etc. The main services offered in cloud computing include software as a service (SaaS), Platform as…
Main memory is also known as the working memory of a computer, internal memory, or primary storage. Its principal function is to hold data and programs temporarily when they are being processed. It seat between the processor and the secondary storage (hard disk). The computer’s main memory is fixed on a memory slot within the…
Let’s first answer what is data. Data is the raw material or facts that are not analyzed to give any meaning. They cannot be used for decision-making because they are not arranged or organized in a manner that users can interpret. Data is taken and manipulated in different ways to give information. So the information…
A hard disk is the main secondary storage in a computer. They are used to store data, programs, and instructions permanently for later use. The disk is categorized as a magnetic disk storage device because they store data using magnetic technology. Some types of hard disks are internal or external, PATA, SATA, SCSI, and USB-connected…
An operating system is fundamental computer software that coordinates how the computer hardware and other software interface with the user. It manages all the computer resources and files. There are many types of operating systems which include batch, and network systems among others. The main functions of the operating system are processor, main memory, input…
Flash memory is a non-volatile type of storage device that is used to store and move data permanently. They are called flash memory since they are Electrical Erasable Programmable Read Only Memory (EEPROM) technology to read and write data. They use electricity to read and write many times on the device Flash memories are used…
Authentication means a way of verifying the identity of an individual, while biometrics means the use of the biological or behavioral characteristics of humans that are unique. Biometric authentication means using the unique biological characteristics of a person to verify that the user is the one that they claim to be. The user data is…
This is an adapter that converts the processed images from the PC processor to the computer monitor. In early PC the adapter was added to the computer as an expansion card, but in today`s PC, the VGA adapter is integrated into the motherboard. Functions of video graphic adapter (VGA) The main function of the adapter…
BIOS stands for Basic Input Output System and is also known as System BIOS. It is a piece of software stored in ROM flash memory called Complementary Metal Oxide Semiconductor (CMOS) which is an EPROM. BIOS carries the basic instructions that instruct the computer on how to boot and from where. It is a firmware…
The storage device is used to keep a copy of data or information temporally when it is being processed, or permanently for future reference. They store the data which is used by the computer and the user. The storage capacity is calculated in terms of bytes where 1 byte is made up of 8 bits…