Question Discussion & Solution

Concept:

System modelling is the process of developing abstract models of a system and each model presenting a different view or perspective of that system. 

Explanation:

Concept that has to be considered while modelling a new system are:

Abstraction: at highest level of abstraction, a solution is stated in broad terms while at the lowest level of abstraction a more detailed solution is provided.

Modularity: it is the single attribute of the software that allows a program to be individually manageable.

Information hiding in this algorithms and data contained within a module are inaccessible to to other modules.

Some other factors that are considered are: architecture, pattern, functional independence, refinement, refinement. 

The correct answer is Input.

• Devices that enter information into the computer and communicate with it are called Input devices.

Key Points

• An input device is a peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system such as a computer or other information appliance.
• The Central Processing Unit (CPU) of a computer receives the input and processes it to produce the output.

Additional Information

• Examples of input devices include
  • Keyboards, mouse, scanners, digital cameras, joysticks, Microphone, TouchPad, Webcam, remote, biometric devices, etc.
• Keyboard is a basic input device that is used to enter data into a computer or any other electronic device by pressing keys.
• Mouse is a hand-held input device that is used to move cursor or pointer across the screen. 
• Scanner uses the pictures and pages of text as input. 

• 9.8 m/s² is the value of acceleration due to the gravity of the surface of the Earth.
• The acceleration which is gained by an object because of the gravitational force is called acceleration due to gravity.
• Its SI unit is m/s²

The correct answer is Banas River.

• Banas River is known as "Forest's Hope".

Key Points

• Banas River
  • The Banas is a river that lies entirely within the state of Rajasthan.
  • It is a tributary of the Chambal River, itself a tributary of the Yamuna, which in turn merges into the Ganga.
  • Banas river originates in the Khamnor Hills of the Aravalli Range, near Kumbhalgarh in Rajsamand.
  • The name "Banaas" literally translates as "forest-hope" (Ban-aas) meaning "Hope-of-the-forest" or 'Van Ki Aasha.' 

Additional Information 

• Bedach River
  • The Berach River, a tributary of the Banas River.
• Bandi River
  • ​The Bandi is a tributary of the Luni River in the Pali district of Rajasthan state.
  • It merged in the Luni river in the Jodhpur district. 
• Arvari
  • ​The Arvari River is a small river flowing through the Alwar District of Rajasthan.

The correct answer is Chhattisgarh.

• Mahanadi river originates from the mountainous terrain of Chhattisgarh.

Key Points

• It originates from many mountain rivers with its origin water located in the Dhamtari district of Chhattisgarh.
• The river originates from an extension of the Eastern Ghats.
• It flows in Odisha where it joins the Bay of Bengal.
• Other names of Mahanadi are Kanaknandini, Chitrapalal, Mahasweta, Nilotpala etc.
• Hirakud Dam is built on the Mahanadi. It is the longest earthen dam in the world.​