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.

The correct answer is Bacteria.

Key Points

• The cause of dysentery is usually the bacteria Shigella, in which case it is known as shigellosis, or the amoeba Entamoeba histolytica. Other causes may include certain chemicals, other bacteria, protozoa, or parasitic worms.
• Amoebic dysentery is caused by the protozoan parasite Entamoeba histolytica. It is transmitted in areas where poor sanitation allows contamination of drinking water and food with feces. In these areas, up to 40% of people with diarrhea may have amoebic dysentery.

Important Points

• Disease caused by Viruses:
  • Chickenpox - It is caused by the Varicella-zoster virus
  • Small Pox - It is caused by the Variola virus
  • Common Cold -It is caused by Rhinovirus
  • AIDS (Acquired Immuno Deficiency Syndrome) - It is caused by Human Immunodeficiency Virus (HIV)
  • Measles -It is caused by the Measles virus
  • Mumps -It is caused by the Mumps virus
  • Rabies - It is caused by the Rabies virus (Rhabdoviridae family)
  • Dengue fever -It is caused by the Dengue virus
  • Viral encephalitis - It is an inflammation of the brain. It is caused by the rabies virus, Herpes simplex, poliovirus, measles virus, and JC virus
• Disease caused by Bacteria:

  • Whooping Cough - It is caused by a bacterium called Bordetella pertussis.

  • Diphtheria - It is caused by Corynebacterium diphtheriae.
  • Cholera - It is caused by Vibrio cholera
  • Leprosy - It is caused by Mycobacterium leprae.
  • Pneumonia- It is caused by Streptococcus pneumonia
  • Tetanus - It is caused by Clostridium tetani
  • Typhoid - It is caused by Salmonella typhi
  • Tuberculosis - It is caused by Mycobacterium tuberculosis
  • Plague - It is caused by Yersinia pestis
• Disease Caused by Protozoans: 
  • Malaria is spread by Anopheles mosquitoes. The Plasmodium parasite that causes malaria is neither a virus nor a bacteria
  • Amoebic dysentery: It is caused by Entamoebahistolytica.
  • Sleeping sickness:  It is caused by Trypanosomabrucei.
  • Kala-azar It is caused by Leishmaniadonovani.
• Disease Caused by Worms
  • Tapeworm: They are intestinal parasites. It cannot live on its own. It survives within the intestine of an animal including a human
  • Filariasis: It is caused by a thread
  • Pinworm: It is caused by a small, thin, white roundworm called Enterobiusvermicularis.

For alphabet: Increase by + 4

 D + 4 → H + 4 → L + 4 → P + 4 → T + 4 → X

For Number: Decrease number by - 4

23 – 4 → 19 – 4 → 15 – 4 → 11 – 4 → 7 – 4 → 3

• In SQL, the function - avg, min, max, sum, count is called as aggregate function.
• Aggregate functions return a single value after calculating from a group of values.
• avg() function returns the average values, max() returns the maximum value, count() finds the number of rows that matches the specified condition, min() returns the minimum value, Max() returns the maximum value. sum() returns the sum of values.

Example:

SELECT AVG(salary

FROM employees

GROUP BY department_id;

The correct answer is First.

• As of June 2015, First place does Rajasthan have in solar power generation between Indian states.

• Solar power capacity of Rajasthan
  • ​According to data released by the Union ministry of new and renewable energy on June 4, 2015, Rajasthan has grabbed the number one position in the country with an installed capacity of 1,167 megawatts against Gujarat's 1,000 MW.

Additional Information

Solar power capacity of India: ​Top 5 states