Question Discussion & Solution

The correct answer is option 1.

Concept:

Weak entity set :

A weak entity set is an entity set that does not contain sufficient attributes to uniquely identify its entities. In other words, a primary key does not exist for a weak entity set. However, it contains a partial key called a discriminator. Discriminators can identify a group of entities from the entity set.

ER diagram:

This ER diagram illustrates key information about the book, including entities such as author, Publisher, books, and Edition. It allows for understanding the relationships between entities.

Author:

For an author, the book dealer might want to keep track of the name (first, middle, and last), date of birth, and date of death.​

Publisher: 

For a Publisher, the book dealer might want to keep track of the phone, name, and address.

Book:

For a book, the book dealer might want to keep track of the id, title, and date.

Edition:

For an edition, the book dealer might want to keep track of the name and the total number of copies.

Relation ER diagram,

• The author can write a number of books and each number of books has many numbers of authors. So it has many to many relationships.
• The book can publish at most one publisher and each number of publishers has many numbers books. So it has many to one relationship.
• The book can has atmost one edition and each number edition has many numbers of books. So it has many to one relationship.

The ER diagram,

Here Edition is a weak entity because it can not have candidate key attributes.​

Hence the correct answer is Edition.

The correct answer is Jalim Singh.

Key Points

• Jalim Singh-
  • He was the Faujdar of Kota State during the reign of Shatarshal.
  • He led the Shatarshal army in the battle of Bhatwara in 1761 AD.
  • He is known as Durgadas Rathore of Kota. 
  • The title of Rajrana has been given to him by the Udaipur Maharana.
  • He made a treaty with the British for the post of Diwan in 1818 AD.

Additional Information

•  Rav Ram Singh-
  • He was the son of Kishore Singh II.
  • He participated in the Jajau war on behalf of Azam and died there.
  • He roasted the enemies with his cannons, hence he is called Bhabhbhujanya.
• Madho Singh-
  • He was the son of Ratan Singh of Bundi.
  • Shah Jahan separated him from Bundi and gave him the Kota kingdom.
  • He was the first ruler of the new Kota princely state.
• Mukund Singh-
  • He was the son of Madho Singh.
  • He was killed while fighting against Aurangzeb in the Battle of Dharmat.
  • He built the Amli-Meeni Mahal.

The correct answer is Deforestation.

• Deforestation is not related to conservation of land resources.

Key Points

• The felling and clearing of forest cover or tree plantations to accommodate agricultural, industrial or urban use is Deforestation.
• Deforestation can also be seen as removal of forests leading to several imbalances, both ecologically and environmentally.
• According to the Global Forest Resources Assessment 2020 (FRA 2020) report, the rate of forest loss has declined in the period of 1990-2020.
• The world’s total forest area is 4.06 billion hectares (bha), which is 31% of the total land area.

Additional Information

• The FRA is released by the United Nations Food and Agriculture Organization (FAO).
• Restriction on overgrazing is done to reduce Negative effects of grazing which include overgrazing, increased soil erosion, compaction and degradation, deforestation.
• Land reclamation is the process of creating new land from oceans, seas, riverbeds or lake beds.
• Regulated use of fertilizer controls the movement of water and nutrients within the plant.

The correct answer is Udaipur.

• Gulab Bagh (also known as Sajjan Niwas Garden) is located in Udaipur.

Key Points

• Gulab Bagh:
  • It is located in Udaipur, Rajasthan.
  • It is the largest garden in Udaipur.
  • The garden is named so because of the abundance of roses and the innumerable varieties of it.
  • It was constructed by Maharana Fateh Singh in 1887.
  • It was earlier known as Sajjan Niwas Garden.
  • It also houses a museum called Victoria museum.
    • The museum is now called Saraswati Bhawan Library.
  • 

The correct answer is Mangifera indica.

Key Points

• Mangifera indica is the botanical name of mango.
  • In this name, Mangifera represents the genus while indica is a particular species.
• Scientific name
  • This system was given by Carolus Linnaeus.
  • Each name has two components – the Generic name and the specific epithet.
  • This system of providing a name with two components is called Binomial nomenclature.

Additional Information

• Monoon longifolium is an Asian small tree species in the family Annonaceae. Common names include false Ashoka, the Buddha tree, the Indian mast tree, and the Indian fir tree.
• Cocos nucifera is a Coconut tree. It is a tall tree that is native to tropical islands in the western Pacific. 
• Casuarina is a nitrogen-fixing tree through symbiotic relationship with an actinomycete called Frankia. Common names include coast sheoak, beach casuarina, beach oak, beach sheoak, beach pine, whistling tree, etc.