Technology Questions and Answers

Answer: A

AC is alternating current and DC is direct current.

In alternating current the direction reverses periodically - 50 times a second in India - which is what allows transformers to change the voltage for transmission. Direct current flows one way only, as from a battery.

Answer: A

LAT stands for Local Area Transport.

It was DEC's protocol for connecting terminals to hosts over Ethernet in the 1980s. Being non-routable, it worked only within a single local network.

Answer: A

The SMPS converts AC to DC in a computer.

The switch mode power supply rectifies the mains, chops it at tens of kilohertz, transforms it with a small high-frequency transformer and rectifies again, giving the 12 V, 5 V and 3.3 V rails efficiently and without a heavy mains transformer.

Answer: C

My Computer was introduced in Windows 95.

It appeared with the new shell of 1995, alongside the Start menu, the taskbar and the Recycle Bin, giving a single icon from which every drive could be reached. It was renamed This PC in Windows 8.1.

Answer: B

Red Hat Linux is an operating system.

It is a distribution of Linux aimed at enterprise use, packaging the kernel with GNU tools, a package manager and long-term support. Red Hat's business model is selling support rather than the software itself.

Answer: C

Printer resolution is measured in dpi - dots per inch.

300 dpi is adequate for text and 1,200 dpi or more for photographic printing. Screen resolution is expressed as pixels instead.

Answer: B

HTML is the most commonly used language in web design.

It marks up the structure of a page - headings, paragraphs, links, images - which CSS then styles and JavaScript makes interactive. Every page on the web is delivered as HTML.

Answer: C

A LAN card is also called a NIC - network interface card.

It provides the physical connection to the network and handles the data link layer, and carries a unique MAC address burned in at manufacture.