Computer Awareness Mixed Quiz: Set 2

Random access memory holds the programs and data the processor is working on at that moment, and it is volatile: the instant the power supply is cut, everything stored in it disappears.

In MS-Word 2016 the button marked 'Aa' in the Font group of the Home tab opens the Change Case menu, which rewrites the selected text without retyping it.

Print quality depends on how many separate dots of ink or toner the printer can place in one inch of paper, so a printer working at a higher DPI produces smoother curves and crisper small text.

In Microsoft PowerPoint, pressing F5 starts the slide show from the first slide, whichever slide you are working on at that moment.

A bit is the smallest unit of data, holding a single binary 0 or 1. Four bits together form a nibble, which is exactly half a byte, and a nibble is convenient because it maps neatly to one hexadecimal digit.

HTTP stands for HyperText Transfer Protocol and it is the set of rules by which a browser asks a web server for a page and the server sends it back, which is how data on the World Wide Web is reached.

A plain scan is only a picture of the page, and nothing in it can be searched or corrected. OCR examines the shape of every character in that picture, matches it against the letters it knows and hands back real text that can be edited in a word processor.

A LAN joins computers and devices inside a small area such as one room, one building or a campus.

It fetches each instruction from memory, decodes it, and then issues signals that tell the other parts of the system what to do and when.

The 2's complement of a binary number is found in two steps: flip every bit to get the 1's complement, then add 1.

A plotter holds a pen against the paper and moves it, so it draws continuous lines rather than building the image out of dots.

A firewall stands between a trusted private network and an untrusted one such as the internet, and checks the data going in and out.

The integrated circuit packs many transistors and other components onto a single silicon chip, and computers built on it were far smaller, cheaper and more reliable than their predecessors.

Static RAM stores each bit in a flip-flop circuit made of several transistors, usually six, so the bit stays put as long as the power is on and never needs refreshing.

It builds the image of a whole page on a photosensitive drum with a laser beam, then picks up dry toner on that image and fuses it onto the paper with heat and pressure.

Ubuntu is a free, open-source operating system built on the Linux kernel and based on the Debian distribution. It was first released in 2004 by Canonical, and its name comes from a Nguni Bantu word of southern Africa meaning humanity towards others.

PARAM 8000 was unveiled in 1991 under the leadership of Vijay Bhatkar, and it made India one of the small group of countries building their own supercomputers.

A plotter takes a drawing that the computer has already prepared and puts it on paper with a moving pen, so data travels out of the machine and never into it.

He set out the idea that a computer should keep its instructions in the same memory as its data, so that a program could be loaded and changed like any other information instead of being wired into the machine.

A line printer, such as a drum or chain printer, sets up and prints a whole line of characters at one stroke, so counting the lines it finishes in a minute is the natural measure of its speed.