Computer (GK) Questions and Answers
1. What is e-waste?
Ans: All obsolete electronic devices such as computers, servers, printers, monitors, TVs, cellphones, calculators, CDs, floppies, chips, processors, motherboard, PCB etc. end up as e-waste. E-waste contains many hazardous substances like PVC, plastics, heavy metals, Brominated Flame Retardants etc.
2. What is utility computing?
Ans: Utility computing is a service provisioning model in which a service provider makes computing resources and infrastructure management available to the customer as needed, and charges them for specific usage rather than a flat rate. Like other types of on-demand computing (such as grid computing), the utility model seeks to maximise the efficient use of resources and/ or minimise associated costs.
3. What is a ‘firewall’ in computer terminology?
Ans: In computer security, a firewall is a device that blocks unauthorised access to an organisation’s local area network. A firewall can reside on the administrative computer, the server that acts as the LAN’s gateway to the Internet. The firewall keeps track of every file entering or leaving the local area network in order to detect the source of viruses and other problems that might enter the network.
4. What does the term ‘screen slave’ mean?
Ans: Screen slaves refers to people who are abnormally addicted to the computer. For example, screen slaves would communicate via e-mail with people sitting right next to them. The screen slave culture, which is particularly rampant in offices the world over, is adding to the sedentary lifestyle of white collar workers, thereby increasing related disorders such as obesity, heart disease and Repetitive Stress Injury.
5. Who invented the QWERTY keyboard?
Ans: QWERTY keyboard (also known as universal keyboard) is used in modern computers. The name QWERTY comes from the first six letters in the top row. It was invented by C L Sholes in 1872.