Bar codes are the vertical zebra-stripped marks. We find it on most of the manufactured products in the market. This system is also called the universal product code. These are read by a bar code reader, a photoelectric scanner that translates the bar code symbols into digital code.
The touchpad is a small, flat surface over which we slide our fingers, using the same movements as we would with a mouse. As we move the finger, the cursor follows the movement. We “Click” by tapping the finger on the pad’s surface or by pressing a button positioned close by the pad. Touchpads are … Read more
QWERTY is the layout of the keyboard. The layout refers to the arrangement of keys on the keyboard. QWERTY describes the beginning keys in the top row of alphabetic letters. A typical keyboard can have 101 to 104 keys. The keyboard is the standard input device. The layout of the keyboard is just like the … Read more
The hardware and software of the computer are interconnected with each other. In other words, hardware cannot function without software. As it required supporting software to use the hardware.
A program that performs a specific task related to the management of computer functions, resources, or files as password protection, memory management, virus protection, and file compression is called a utility program.
A fat tree topology is a type of network layout. It is commonly used in computer networks to handle a large amount of data traffic. The network is built in layers in this topology. They start with smaller nodes (like leaves) that connect to larger nodes (like branches and roots). Each layer adds more capacity … Read more
When a server fails in a tree topology the entire branch connected to that server loses its connection to the main network. A tree topology connects different levels of devices. They formed a structure similar to a tree with roots, branches, and leaves. If the main server at the top level fails, all the devices … Read more
Sometimes monitors have problems, but many issues can be easily fixed. Here are a few common problems and how to solve them:
1. Emotional Intelligence Computers cannot understand human emotions. They can recognize certain words, but they do not know the feelings behind them. For example, a laptop may notice the word “happy,” but cannot feel happiness or respond with true emotion. 2. Creativity Computers are not creative. They can follow instructions and repeat patterns but not … Read more
The main models of data communication are: The OSI model has seven layers that describe how data moves between devices. It’s a theoretical model that helps understand network communication. The TCP/IP model has four layers and is used in real-world internet communications. It’s simpler and more practical than the OSI model.