Question Discussion & Solution

A constructor is a member function of a class that initializes objects of a class. In C++, Constructor is automatically called when an object (instance of a class) creates. It is a special member function of the class.

Syntax

class_name(parameter1, parameter2, ...)

{

    // constructor Definition

}

Default Constructor

It is the constructor that doesn’t take any argument. It has no parameters.

Parameterized Constructors

It is possible to pass arguments to constructors. Typically, these arguments help initialize an object when it is created. 

Copy Constructor

A copy constructor is a member function that initializes an object using another object of the same class.

The correct answer is F11.

• The F11 key can take our screen into and out of full-screen mode quickly and easily. 

​Important Points

• Function key
  • A function key is a key on a computer or terminal keyboard which can be programmed so as to cause an operating system command interpreter to perform certain actions, a form of a soft key.

​ 

• F11​
  • The Most simple use is the F11 key can take our screen into and out of full-screen mode quickly and easily. 
  • F11 key can be used by combined with Shift, Ctrl, Alt keys.
    • Some of the uses of the F11 key in MS Word.
      • SHIFT + F11 = Go to the previous field.
      • CTRL + F11 = Lock a field.
      • CTRL + SHIFT + F11 = Unlock a field.
      • ALT + F11 = Display Microsoft Visual Basic Code.
      • ALT + SHIFT + F11 = Display Microsoft Visual Studio Code.

​Additional Information

• F8
  • ​​We can access the menu by turning on your computer and pressing the F8 key before Windows starts.
• F9
  • F9 will refresh fields in Word and prompt Outlook to send and receive messages.
• F10
  • ​F10 activates the menu bar or Ribbon of an open application.
  • Shift + F10 is the same as right-clicking on a highlighted icon, file, or Internet link. 

Pointers:

• Pointers in C language is a variable that stores/points to the address of another variable.
• A Pointer in C is used to allocate memory dynamically i.e. at run time.
• The pointer variable might belong to any of the data types such as int, float, char, double, short, etc.

Operators in pointers:

• * and & are the operators used in pointers.
• * gives us the value stored at a particular address whereas “ & “ gives us the address of the variable.

Concept:

Resistance: The property of electrical materials and electrical instruments that opposes the flow of current through them is called resistance.

It is denoted by R. The SI unit of resistance is the ohm (Ω).

Power: The rate of work done by an electric current is called power. It is denoted by P. The SI unit of power is the watt (W).

Power dissipation (P) is given by:

\(P=VI=\frac{V^2}{R}=I^2R\)

Where V is the potential difference across resistance, I is current flowing and R is resistance.

Calculation:

With R = 50 Ω, and V = 220 V, the power required by the bulb will be:

\(P=\frac{V^2}{R}=\frac{220\times 220}{50}\)

P = 968 W

The correct answer is All of the above.

Key Points

• The major factors responsible for Desertification such as:
  • High temperature
  • High wind velocity.
  • Low vegetation.
  • High rainfall.
  • Overgrazing.
  • The exploitation of natural resources.
  • Soil pollution.
  • Climatic variability.

Additional Information

• The Thar desert is also known as The Great Indian Desert.
• It is spread over four states in India:
  • Punjab
  • Haryana
  • Gujarat
  • Rajasthan
• Thar Desert of Rajasthan, also known as the Great Indian Desert is a large arid region in the northwestern part of the Indian subcontinent and forms a natural boundary running along the border between India and Pakistan with an area of more than 100,000 km.
• It extends from the Sutlej river and is surrounded by the Aravali ranges on the east, on the south by the salt marsh known as the Great Rann of Kutch.
• The Annual Average rainfall is around 20-50mm.