• Space complexity is a measure of how efficient your code is in terms of memory used.

• The multiplication involved will use two for loops and hence the complexity will be Theta(n²)

Cant be determined as the size of K is not known.

• Friend Class – A friend class can access private and protected members of other class in which it is declared as friend. It is sometimes useful to allow a particular class to access private members of other class.
• Constructor – A constructor is a member function of a class which initializes objects of a class. In C++, Constructor is automatically called when object (instance of class) create. It is special member function of the class.
• Static – Static categories are sealed and thus can’t be transmissible. They can not inherit from any category except Object. Static categories cannot contain associate instance constructor. but, they will have a static builder.
• Destructor – Destructor is a member function which destructs or deletes an object.

• Public – The members declared as Public are accessible from outside the Class through an object of the class.
• Protected – The members declared as Protected are accessible from outside the class but only in a class derived from it.
• Private – These members are only accessible from within the class. No outside Access is allowed.
• Member Function – Member functions are the functions, which have their declaration inside the class definition and works on the data members of the class. The definition of member functions can be inside or outside the definition of class.

• In object-oriented programming, inheritance is that the mechanism of basing an object or category upon another object (prototypical inheritance) or category (class-based inheritance), holding similar implementation.

• It refers to the concept of one class extending (Or inherits) more than one base class. The inheritance we learnt earlier had the concept of one base class or parent. The problem with “multiple inheritance” is that the derived class will have to manage the dependency on two base classes.

• When a class extends a class, which extends anther class then this is called multilevel inheritance. For example class C extends class B and class B extends class A then this type of inheritance is known as multilevel inheritance.

• When more than one classes inherit a same class then this is called hierarchical inheritance. For example class B, C and D extends a same class A.

• A class in Java can extend another class to become a subclass. When class B extends the class A, B becomes subclass (child) and A becomes superclass (parent). A subclass can reuse all the features of the parent class and code reuse is a major reason for extending a class

• Public – The members declared as Public are accessible from outside the Class through an object of the class.
• Protected – The members declared as Protected are accessible from outside the class but only in a class derived from it.
• Private – These members are only accessible from within the class. No outside Access is allowed.