Question Discussion & Solution

The correct answer is Memory.

Key Points

• The memory mapping process is handled by the virtual memory manager, which is the same subsystem responsible for dealing with the page file.
• Memory-mapped files are loaded into memory one entire page at a time.
• The page size is selected by the operating system for maximum performance. 

Additional Information

• A memory
  • It is just like a human brain.
  • It is used to store data and instructions. 
  • Computer memory is the storage space in the computer, where data is to be processed and instructions required for processing are stored.
  • The memory is divided into a large number of small parts called cells.
• Process
  • It is the instance of a computer program that is being executed by one or many threads.
  • It contains the program code and its activity.
  • Depending on the operating system, a process may be made up of multiple threads of execution that execute instructions concurrently.
• A computer file
  • It is a computer resource for recording data in a computer storage device.
  • Just as words can be written to paper, so can data be written to a computer file.
  • Files can be edited and transferred through the Internet on that particular computer system.
• Computer security
  • cybersecurity or information technology security is the protection of computer systems and networks from information disclosure, theft of or damage to their hardware, software, or electronic data, as well as from the disruption or misdirection of the services they provide.

The correct answer is Calcium carbonate.

Important Points

• Calcium carbonate and its forms:
  • In nature, calcium carbonate occurs in the forms of chalk, limestone, and marble.
  • Formation:
    • ​The skeletal remains of dead sea animals sink to the seabed. Over millions of years, layer build-up and pressure from the top layer changes the bottom layer into chalk. 
  • Earth movements due to earthquake lift the layer of chalk to the Earth's surface. 
  • The earth's movements can also cause the layers to sink further. Thus, high pressure and heat cause the chalk to turn into much harder limestone. 
  • The limestone deposit may stay below the Earth for a longer time and due to higher pressure and temperature, the limestone turns to marble.

The correct answer is 36.

• In the year 2019-20, 36 Gram Panchayats in Rajasthan are proposed to introduce the 'Zero Budget Natural Agriculture Scheme'.

Key Points

• Rajasthan 'Zero Budget Natural Agriculture Scheme'
  • ​Rajasthan is focusing on ZBNF since State Budget 2019-20.
  • Consequently, it has been decided that Zero Budget Natural Farming will be taken up in 36 Gram Panchayat of Banswara, Tonk and Sirohi at the cost of 10 crores, benefiting 20 thousand farmers.

​Additional Information

• Zero Budget Natural Farming in India 
  • ​It was originally promoted by agriculturist Subhash Palekar, who developed it in the mid-1990s.
  • It is an alternative to the Green Revolution's methods that are driven by chemical fertilizers and pesticides and intensive irrigation. It is a unique model that relies on agroecology.
  • It aims to bring down the cost of production to nearly zero and return to a pre-green revolution style of farming.

Polymorphism:-

• The word polymorphism means having many forms. In simple words, we can define polymorphism as the ability of a message to be displayed in more than one form.
• A real-life example of polymorphism is when two people have distinct characteristics at the same time. At the same time, he is a father, a spouse, and an employee. As a result, the same person behaves differently in different settings. 
•  Polymorphism is considered one of the important features of Object-Oriented Programming.

Polymorphism is mainly divided into two types:

• Compile-time Polymorphism
• Runtime Polymorphism

Compile-time polymorphism

This is achieved by function overloading or operator overloading.

• Function Overloading - When there are multiple functions with the same name but different parameters then these functions are said to be overloaded
• Operator overloading - When there are multiple operations that can be performed by using a single operator is called operator overloading for example operator ‘+’ when placed between integer operands, adds them, and when placed between string operands, concatenates them.

Run Time Polymorphism

It is achieved by Function Overriding

Additional Information

Encapsulation

• It is the process or method to contain the information.
• Wrapping of data and function into a single unit is called data encapsulation
• Encapsulation is a method to hide the data in a single entity or unit along with a method to protect information from outside.
• It can be implemented using by access modifier.  

Inheritance

The capability of a class to derive properties from another class is called Inheritance

• The class that inherits properties from another class is called Subclass or Derived Class.
• The class whose properties are inherited by a subclass is called Base Class or Superclass.

Syntax for Inheritance

class derived_name : access_mode base_class

{

//body of the derived class

};

1^st letter: increase by - 8, - 4, - 2, - 1

P - 8→ H - 4→ D - 2 → B - 1 → A

2^nd letter: second letter increase by + 2

K + 2→ M +2 → O + 2 → Q + 2 → S

3^rd letter: Decrease by - 1

R - 1→ Q – 1 → P - 1 → O – 1 → N