Madhya Pradesh 2016 Previous Year GK Questions with Answers

The correct answer is B, Magnetic field strength (H). Ampere-turns per metre, written AT/m, is the unit of magnetic field strength, because H is the magnetomotive force set up per unit length of the magnetic path. In a coil the magnetomotive force equals the current multiplied by the number of turns and is measured in ampere-turns; divide that by the length of the magnetic circuit and the result is H, which is why the unit carries a metre in the denominator. H is also called magnetising force, and in air it is linked to flux density by B equal to the permeability times H. A is wrong because magnetic flux density B is measured in tesla, that is weber per square metre. C is wrong because magnetic flux is measured in weber. D is wrong because magnetomotive force itself is measured in ampere-turns, with no length divided out. Exam tip: ampere-turn is magnetomotive force, ampere-turn per metre is field strength H, weber is flux and tesla is flux density.

The correct answer is D, All of Above. An electronic spreadsheet such as Microsoft Excel or LibreOffice Calc can filter, merge and sort data, so all three belong to its work and no single one of them is the answer. A spreadsheet keeps data in a grid of rows and columns; the box where a row and a column meet is a cell, and a cell may hold a number, text or a formula. Its real strength is that a formula recalculates by itself the moment a figure it uses is changed, which is why spreadsheets are used for accounts, marksheets, salary statements and simple databases. Besides sorting and filtering it offers functions such as SUM, AVERAGE and COUNT, pivot tables, and charts drawn straight from the data. A is wrong because filtering, which hides rows that do not meet a condition, is only one of these jobs. B is wrong because merging cells is likewise only one. C is wrong because sorting, arranging rows by the order of a column, is one more. Exam tip: a spreadsheet file is a workbook and each page inside it is a worksheet.

The correct answer is B, Impact. A daisy wheel printer prints by striking the paper, so it is an impact printer. It carries a flat wheel with spokes, each spoke ending in a moulded letter or figure, and the wheel looks like the petals of a daisy, which gives it its name. A hammer hits the chosen petal against an inked ribbon and presses the character onto the paper, exactly as a typewriter does. It gives clean letter quality text but is noisy, slow and cannot draw pictures. Option A is wrong because non impact printers such as inkjet, laser and thermal printers never touch the paper with a type element. Option C is wrong because a laser printer forms the image with a laser beam and toner powder, without any striking. Option D is wrong because a daisy wheel is a character printer, printing one character at a time, while a line printer prints a whole line. Exam tip: impact printers are dot matrix, daisy wheel, drum and chain.

The correct answer is C, Ctrl + tab. In Google Chrome, holding Control and pressing Tab moves to the next open tab on the right, and the pair Control, Shift and Tab moves back to the previous one. Chrome also lets a tab be opened with Control and T, closed with Control and W, and the last closed tab reopened with Control, Shift and T, while Control with a number from 1 to 8 jumps straight to that tab. Option A is wrong because Alt and Tab is a Windows shortcut that switches between open programs, not between tabs inside the browser. Option B is wrong because Shift, Control and Alt together are only modifier keys and do nothing on their own. Option D is wrong because Control, Alt and Delete opens the Windows security screen from which the Task Manager can be started. Exam tip: Ctrl + Tab next tab, Ctrl + T new tab, Ctrl + W close tab.

The correct answer is C, Pisciculture. The Blue Revolution means the rapid rise in fish production, so it belongs to pisciculture, the rearing of fish. In India it began with the Fish Farmers Development Agency set up in the early 1970s, and Dr Hiralal Chaudhuri, who worked out induced breeding in carp, is called its father. The effort continued through the Neel Kranti Mission and then the Pradhan Mantri Matsya Sampada Yojana, and India today is among the largest fish producers in the world, with inland fisheries giving most of the catch. Option A is wrong because floriculture, the growing of flowers, comes under the Golden Revolution in horticulture. Option B is wrong because sericulture is the rearing of silkworms for silk. Option D is wrong because horticulture, the growing of fruit and vegetables, is linked to the Golden Revolution. Exam tip: Blue for fish, White for milk, Yellow for oilseeds, Green for food grains.

The correct answer is B, F. The hexadecimal system has base sixteen, so it needs sixteen symbols for a single place. The digits 0 to 9 give the first ten values and the letters A to F stand for the remaining six, with A as 10, B as 11, C as 12, D as 13, E as 14 and F as 15. One hexadecimal digit therefore holds exactly four bits, which is why memory addresses, colour codes such as FF0000 for red and machine code are written in hex: a long binary string becomes short and easy to read. Option A is wrong because stopping at C would give only thirteen symbols, too few for base sixteen. Option C is wrong because stopping at B leaves twelve. Option D is wrong because stopping at D leaves fourteen, still short of sixteen. Exam tip: binary base 2, octal base 8 using 0 to 7, hexadecimal base 16 using 0 to 9 and A to F.

The correct answer is A, Port. A port is the socket on a computer where an external device is plugged in, so that the keyboard, mouse, printer, monitor or pen drive can exchange data with the machine. Common ones are the USB port, the HDMI and VGA display ports, the audio jack and the Ethernet port, and older machines had serial and parallel ports. Ports may be physical sockets or, in networking, numbered software ports such as 80 for HTTP. Option B is wrong because a ring is a network topology in which computers are joined in a closed loop. Option C is wrong because a bus is the set of internal wires that carries data, addresses and control signals inside the computer, not a socket for accessories. Option D is wrong because Zip is a file compression format and the name of an old removable disk drive. Exam tip: port connects, bus carries.