10 Computer Fun Facts

1. What is URL?

A URL (Uniform Resource Locator) is a form of URI and is a standardised naming convention for addressing documents accessible over the Internet and Intranet. An example of a URL is https://www.rem.my, which is the URL for this web page.

2. Cookies

An HTTP cookie is a small piece of data sent from websites, stored on the user’s computer by the web browser of the user while the user is browsing.

When you visit Internet site, cookies are messages that web servers transfer to your web browser. In a small file called the cookie.txt, your browser stored each post. Your browser sends the cookie back to the server when you request a new page from the server.

3. What is IoT?

The Internet of Things (IoT) is a system of interrelated computing devices, mechanical and digital machines, objects, animals or people that are provided with unique identifiers and the ability to transfer data over a network without requiring human-to-human or human-to-computer interaction.

4. How does an optical fibre work?

Imagine what they’d make of modern fibre-optic cables “pipes” that can carry telephone calls and emails right around the world in a seventh of a second! Photo: Light pipe: fibre optics means sending light beams down thin strands of plastic or glass by making them bounce repeatedly off the walls.

Fibre optics is faster than most other transmission mediums. The signal has a constrained loss rate, which means that very little of a signal is lost over rather long distances.

5. Why do batteries bulge?

Bulging batteries mean only one thing build-up of gas inside. The gases are produced due to electrochemical oxidation of the electrolyte. Such oxidation occurs usually due to overcharging of the battery due to a faulty battery, or faulty charging electronics in the phone or battery charger.

6. What is bounced email?

Bounced email is an email that couldn’t be delivered. Specifically, it’s an explanation of delivery failure related to server or spam issues, whether they are permanent or temporary. Typically, it is a metric expressed as a percentage of subscribers who didn’t receive your message. There are two types of bounces: hard and soft.

7. Wireless Electricity Technology

Wireless power transfer (WPT), wireless power transmission, wireless energy transmission, or electromagnetic power transfer is the transmission of electrical energy without wires. Wireless power transmission technologies use time-varying electric, magnetic, or electromagnetic fields.

8. How does website works?

The browser connects to the server through an IP Address; the IP address is obtained by translating the domain name. – In return, the server sends back the requested page. Web pages are written in HTML, Hypertext Markup Language. In order to host your page on a web server you need to pay a hosting charge.

9. Pixel

The pixel (a word invented from “picture element”) is the basic unit of programmable colour on a computer display or in a computer image. Think of it as a logical – rather than a physical – unit. The physical size of a pixel depends on how you’ve set the resolution for the display screen. If you’ve set the display to its maximum resolution, the physical size of a pixel will equal the physical size of the dot pitch (let’s just call it the dot size) of the display. If, however, you’ve set the resolution to something less than the maximum resolution, a pixel will be larger than the physical size of the screen’s dot (that is, a pixel will use more than one dot).

The specific colour that a pixel describes is some blend of three components of the colour spectrum – RGB. Up to three bytes of data are allocated for specifying a pixel’s colour, one byte for each major colour component. A true colour or 24-bit colour system uses all three bytes. However, many colour display systems use only one byte (limiting the display to 256 different colours).

10. How do self-driving cars work?

Various self-driving technologies have been developed by Google, Uber, Tesla, Nissan, and other major automakers, researchers, and technology companies.

While design details vary, most self-driving systems create and maintain an internal map of their surroundings, based on a wide array of sensors, like radar. Uber’s self-driving prototypes use sixty-four laser beams, along with other sensors, to construct their internal map; Google’s prototypes have, at various stages, used lasers, radar, high-powered cameras, and sonar.

Software then processes those inputs, plots a path, and sends instructions to the vehicle’s “actuators,” which control acceleration, braking, and steering. Hard-coded rules, obstacle avoidance algorithms, predictive modelling, and “smart” object discrimination (i.e., knowing the difference between a bicycle and a motorcycle) help the software follow traffic rules and navigate obstacles.

Sensors generate a 3-dimensional map to aid navigation. Partially-autonomous vehicles may require a human driver to intervene if the system encounters uncertainty; fully-autonomous vehicles may not even offer a steering wheel. Self-driving cars can be further distinguished as being “connected” or not, indicating whether they can communicate with other vehicles and/or infrastructure, such as next generation traffic lights. Most prototypes do not currently have this capability.

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