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.

Let Rahul’s age be x.

Let Rita’s age be y.

Let Ekta’s age be z.

⇒ x = y + 3

⇒ y = 4z – 3

⇒ x = 4z – 3 + 3

⇒ x = 4z

⇒ x/z = 4

⇒ x ∶ z = 4 ∶ 1

1. Some students can either be mischievous or Intelligent.

2. Some Intelligent person can either be mischievous or students.

Thus there are some relation between all the three i.e students, intelligent and mischievous

Now, according to this, the most suitable Venn diagram is-

Hence, Option (4) is correct.

Additional InformationMischievous: A person likes to have fun by playing harmless tricks on people or doing things they are not supposed to do.

Concept:

In general, each object contains three object associated attributes:

• Object prototype: It is kind of reference/indication to another object from which properties are inherited.
• Object class: It is a kind of string which classifies the type an object.
• Object's extensible flag: It simply specifies that whether some new properties are added to the object

The correct answer is First.

• In the year 2017-18, Rajasthan was the largest millet producing state of India.

Key Points

• Rajasthan was followed by Maharashtra and Karnataka.
• The year 2023 will be observed as the International Year of Millets. 
• The Central Government declared 2018 as the year of millets. 
• Millet Mission comes under the National Food Security Mission (NFSM) which was launched in October 2007. 
• Millets include Jowar and ragi etc.

Additional Information 

• Types of Crops in India:
  • Kharif: Sown in June/July, harvested in September/October, e.g., rice, jowar, bajra, ragi, maize, cotton, and jute.
  • Rabi: Sown in October/December, harvested in April/May, e.g., wheat, barley, peas, rapeseed, mustard grains.
  • Zyad: They are raised between April/June, e.g., melons, watermelons, cucumbers, toor, leafy and other vegetables.