Question Discussion & Solution

If '+' means 'divide by', '-' means 'add to', '×' means 'subtract from' and '/' means 'multiply by',

[{(20 × 6) × (7 / 2)} + (3 - 2)] / 5

We put the right symbol given is the question-

= [{(20 - 6) - (7 × 2)} / (3 + 2)] × 5

Now apply BODMAS rule

= [{14 - 14} / 5] × 5

= [0 / 5] × 5

= 0

Hence, "0" is the correct answer.

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. 

The correct answer is Sikandar Lodhi.

• The Mosque of Moth was constructed during the reign of Sikandar Lodi.

Key Points

• Moth Ki Masjid was built in 1505 by Wazir Miya Bhoiya who was a Prime Minister at the Royal Courts of Sultan Sikandar Lodhi.
• Sikandar Lodhi (1489 AD-1517 AD):
  • Sikandar Lodhi was the son of Bahlol Lodhi who conquered Bihar and western Bengal.
  • Noblest of the three Lodhi rulers, real name was Nizam Khan (son of Bahalul Lodhi).
  • He conquered Bihar and Bengal in 1504 AD. He built a new city named Agra and made it his capital.
  • He shifted his capital from Delhi to Agra, a city founded by him.
  • He broke the sacred images of the Jwalamukhi Temple at Nagarkot and ordered the temples of Mathura to be destroyed.
  • He introduced the Gaz-i-Sikandari (Sikandar’s yard) of 32 digits for measuring cultivated fields.
  • He was a poet and wrote verses in Persian under the pet name Gularukh.
  • He repaired Qutub Minar. 

Additional Information

• Muhammad Tughlaq set up a new department of agriculture Diwani-
  Kohi.
• Alauddin is credited to have built many forts and the most important of them is Ali Fort.
  • He also constructed the Alai Darwaja, the entrance gate of Qutub Minar.
• Qutbuddin Aibak constructed two mosques, Quwwat-ul- Islam in Delhi and Adhai din ka Jhonpra in Ajmer.
  • He also began the construction of Qutub Minar.

The correct answer is ​Heat is absorbed.

Key Points

•  When ice is converted into water heat is absorbed by the ice, so the molecules of ice increase their energy and convert into water. Hence option A is correct.
• Additional Information
• The conversion of ice into water is an example of melting. If you took out the ice cubes from the freezer and placed them in a warm room, the ice would absorb energy from the warmer air around them. This absorbed energy would facilitate them to overcome the force of attraction holding them together, enabling them to slip out of the fixed position that they held as ice. The process in which solids change to a liquid is called melting. The melting point is the temperature at which a solid changes to a liquid. 
• The static water is converted to ice It means when the water is converted into ice its potential energy decreases. 
• If we compare the kinetic and potential energy of the water vapor, water and ice then water vapor has the most kinetic as well as potential energy as compared to water and ice.
• This is because the particle of water vapor is free to move and they can move more vigorously. Please note that kinetic energy is associated with moving objects whereas potential energy is associated with a static object. 

The correct answer is ALGORITHM.

Key Points

• An algorithm is a specific procedure for solving a well-defined computational problem.
• The development and analysis of algorithms are fundamental to all aspects of Computer Science like AI, databases, graphics, networking, OS, etc.
• Algorithm development is more than just programming.
  • It requires an understanding of the alternatives available for solving a computational problem.
  • It includes the hardware, networking, programming language, and performance constraints that accompany any particular solution.

Additional Information

• An official language comprising a collection of instructions that produce different kinds of output is a programming language.
• In computer science, programming languages are used to implement algorithms.
• Most of the languages of programming consist of computer instructions.