Question Discussion & Solution

The correct answer is ​Laser Printer.

Important Points

• Hard copy output devices
  • Hard copy output devices are devices that provide output on printed paper or other permanent media that is human readable. 
  • Examples of devices that produce hard copy are printers, plotters.

Key Points

• Laser printers 
  • Laser printers are machines that melt toner powder onto paper to create a print. 
  • Laser printers are more expensive than inkjet printers upfront and use pricier toner cartridges.
  • It is a more economical option in the long run with its overall lower cost per page.
  • Laser printers have faster print speeds.
  • A semiconductor diode laser is currently used in laser printers as the light source.

Additional Information

• Visual Display Terminal
  • The term VDT refers to a type of equipment for visual display, such as computer screens.
• Projector
  • ​A projector or image projector is an optical device that projects an image onto a surface, commonly a projection screen.
• Monitor
  • ​A computer monitor is an output device that displays information in pictorial form.
  • A monitor usually comprises the visual display, circuitry and power supply.

A keyboard is for putting information including letters, words, and numbers into the computer. A keyboard's primary function is to act as an input device. Using a keyboard, a person can type a document, use keystroke shortcuts, access menus, play games and perform a variety of other tasks.

Key Points

• A modifier key is a key on a computer's keyboard that's only used in conjunction with another key.
• Modifier keys are often used with other keys to perform computer keyboard shortcuts and other commands.
• For example, in many text editor programs pressing the Ctrl+A selects all text.

Additional Information

• The function keys or F keys are lined across the top of the keyboard and labeled F1 through F12. These keys act as shortcuts, performing certain functions, like saving files, printing data, or refreshing a page.
  • For example, the F1 key is often used as the default help key in many programs. The F5 key is used in an Internet browser to refresh or reload a web page. The function of these keys can differ by the operating system and by a software program.
• A special key or media key, or multimedia key is a keyboard key that performs a special function not included with the traditional 104-key keyboard.
  • For example, the picture shows a Logitech keyboard.
• An ergonomic keyboard is a keyboard designed for comfort, ease of use, and reduced strain on the user.
  • Such keyboards may include features like concave or tapered keys, keys that are well-spaced, or keys that separate and angle out from a central pivot point.

Therefore, based on the above information The keys of a keyboard, which are used to modify the input of other keys, are called modifier keys.

The correct answer is Viticulture.

• Cultivation of grapes called Viticulture.

Key Points

• Cultivation of grapes either for wine production or for raw consumption (table grapes) is called Viticulture.
• China is the leading producer of grapes.
• It accounts for 16.9% of global production.
• China is followed by Italy at 10.8%, and later by the United States at 8.7%.

Additional Information

• Horticulture is a type of agriculture in which fruits and vegetables are grown.
• The breeding, rearing, and transplantation of fish are called pisciculture.
• Sericulture is the production of raw silk by means of raising caterpillars.

Refrigerator, furniture and television are needed in one house but these are not the necessary things. Without these three a house can be built but without the walls a house cannot be built.

The correct answer is Kwashiorkor.

Key Points

• Kwashiorkor disease of caused by protein deficiency.
• Kwashiorkor, also known as “edematous malnutrition” because of its association with edema (fluid retention), is a nutritional disorder most often seen in regions experiencing famine.
• It is a form of malnutrition caused by a lack of protein in the diet. People who have kwashiorkor typically have an extremely emaciated appearance in all body parts except their ankles, feet, and belly, which swell with fluid.

Important Points

• Most people who are affected by kwashiorkor recover fully if they are treated early.
• Treatment involves introducing extra calories and protein into the diet. Children who develop kwashiorkor may not grow or develop properly and may remain stunted for the rest of their lives.
• There can be serious complications when treatment is delayed, including coma, shock, and permanent mental and physical disabilities. Kwashiorkor can be life-threatening if it’s left untreated.
• It can cause major organ failure and eventually death.

Additional Information