Question Discussion & Solution

The correct answer is Dot Matrix.

Important Points

• Impact printer
  • Impact printer refers to a class of printers that work by banging a head or needle against an ink ribbon to make a mark on the paper.
  • The three most common forms of impact printers are:
    • Dot-matrix.
    • Daisy-wheel.
    • Line printers.

Key Points

• Dot-matrix Printers 
  • The technology behind dot-matrix printing is in such a way that the paper is pressed against a drum (a rubber-coated cylinder).
  • The electromagnetically-driven printhead moves across the paper and strikes the printer ribbon situated between the paper and printhead pin.
  • The impact of the printhead against the printer ribbon imprints ink dots on the paper which create human-readable characters.

Additional Information

• Laser Printer
  • ​A laser printer is a printer that uses a focused beam of light to transfer text and images onto paper. 
• Inkjet printer
  • ​Inkjet printers, as the name implies, use ink to print text, graphics, and images onto various types of paper. 
  • Inkjet printers, cartridges, and supplies are more widely available therefore cheaper than their thermal printer.
• Thermal printer​
  • Thermal printers use tiny heating elements to activate or transfer pigments.
  • Thermal printers are used most commonly to create labels, safety signs.

Biosphere reserves are areas of terrestrial and coastal ecosystems that promote the conservation of biodiversity with its sustainable use. 

• They are internationally recognized within the framework of UNESCO’s Man and Biosphere (MAB) program and nominated by national governments.
• There are over 500 biosphere reserves in over 100 countries around the world.
• There are 18 notified Biosphere reserves in India.
• Out of them, 11 Biosphere Reserves are in UNESCO’s MAB World Network. 

Important Points

Biosphere Reserves and their respective years of including in the MAB network are as follows:

• ​Nilgiri (2000)
• Gulf of Mannar (2001)
• Sunderban (2001)
• Nanda Devi(2004)
• Nokrek (2009)
• Pachmarhi(2009)
• Similipal (2009)
• Achanakmar-Amarkantak Biosphere Reserve (2012)
• Great Nicobar Biosphere Reserve (2013)
• Agasthyamala Biosphere Reserve (2016)
• Khangchendzonga Biosphere Reserve(2018)

From the above, we can conclude that Nilgiri Biosphere Reserve is the first Biosphere reserve in India.

Additional Information​ 

Nilgiri Biosphere reserve:-

• ​The Nilgiri Biosphere Reserve was the first and Oldest biosphere reserve in India established in the year 1986.
• It is located in the Western Ghats and includes 2 of the 10 biogeographical provinces of India.
• The Nilgiri Biosphere Reserve falls under the biogeographic region of the Malabar rain forest.
• The Mudumalai Wildlife Sanctuary, Wayanad Wildlife Sanctuary Bandipur National Park, Nagarhole National Park, Mukurthi National Park, and Silent Valley are the protected areas present within this reserve.

The correct answer is Anand Math.

• The National song of India, ‘Vande Matram’ has been taken from Anand Math.

Key Points

• Anand Math:
  • It was authored by Bankim Chandra Chatterjee.
  • The book was originally written in 1882.
  • Anandamath takes the reader back to Bengal in the clutches of the famine, the backdrop of the pre-independence struggle and the turmoil of human lives caught in this frame of time. 
  • It is considered one of the most remarkable works of the Bangla language and Indian literature.
  • Through the book, Bankim also gave us the song ‘VandeMataram’which became the rallying call for rebels.
  • The first two stanzas eventually became the National song of India.
  • One of the gems of Indian Literature, ‘Anandmath’ carries a deep sentiment of nationalism which was the essence of the freedom struggle.

Additional Information

• The 'Neel Darpan' published in 1860 portrays the plight of indigo cultivators was created by Deenbandhu Mitra.
• The first play ever commercially staged was Neel Darpan in 1872.
• It was translated by Micheal Madhusudan Dutta and it was published by

The correct answer is 4°C.

• Freezing of Water:
  • As water freezes, cold water (or ice formed) comes on the surface and warm water goes down.
  • Since the freezing temperature of the water is 0ºC or 273 K.
  • So water at the bottom should be at a higher temperature.
  • Water density at 4ºC is more than the density of water at 0ºC, hence the correct option is 4ºC.

​Key Points

• Reason of low temperature at bottom of the top layer:
  • This is due to the process of convection.
  • When the temperature of the water at the top layer reaches the freezing point, it is converted to ice.
  • But ice is lighter than water, so it will not sink to the bottom.
  • So there will be ice on the top surface and water would remain at the bottom of the lake. 

The correct answer is MICR.

Key Points

•  MICR- Magnetic Ink Character Recognition
  • It is a technology used primarily to identify and process checks.
  • The MICR on a check is the string of characters that appears at the bottom left of the check.
  • It consists of three groups of numbers, including the bank routing number, the account number, and the check number.

Additional Information

•  OCR- Optical Character Recognition
  • It is a widespread technology to recognize text inside images, such as scanned documents and photos.
  • It is used to convert virtually any kind of image containing written text (typed, handwritten, or printed) into machine-readable text data.
• OMR- Optical Mark Recognition
  • It is the process of reading information that people mark on surveys, tests, and other paper documents.
• IFSC- Indian Financial System Code
  • It represents the 11 digit character on our bank’s cheque leaves, or other bank-sponsored material.
  • This 11 character code helps identify the individual bank branches that participate in the various online money transfer options like NEFT and RTGS.