Question 1

Why do we need the pre-processor directive # include < iostream >?

Accepted Answer

The `<iostream>` directive literally commands the C++ compiler to physically include the standard input/output stream library during the preprocessing phase.

Question 2

What are the applications of void data type in C++?

Accepted Answer

The `void` keyword explicitly declares that a function returns absolutely no value, or it acts as a generic pointer type.

Question 3

What are objects ? How are they created?

Accepted Answer

Objects are active, instantiated physical memory entities structurally generated from a static Class blueprint using specific constructors.

Question 4

What is parameterized constructor?

Accepted Answer

A parameterized constructor violently injects initial external data directly into an object the exact moment it is instantiated in memory.

Question 5

Describe the syntax of Operator function.

Accepted Answer

The operator function syntax mandates the `operator` keyword directly followed by the specific mathematical symbol being rigorously overloaded.

Question 6

What is a virtual base class?

Accepted Answer

A virtual base class mathematically resolves the "Diamond Problem" of multiple inheritance by strictly ensuring only one instance of the base is inherited.

Question 7

What are the application of this pointer?

Accepted Answer

The `this` pointer explicitly resolves severe naming collisions by holding the absolute memory address of the actively executing object.

Question 8

What role does the iomanip file play?

Accepted Answer

The `<iomanip>` library provides powerful stream manipulators strictly engineered to format console output aesthetics, like setting decimal precision.

Question 9

What are input and output stream?

Accepted Answer

Streams are abstract, sequential flows of raw byte data mathematically routed between the CPU and external physical devices.

Question 10

What is generic programming?

Accepted Answer

Generic programming utilizes C++ Templates to write absolutely type-agnostic algorithms, letting the compiler mathematically generate the exact type-specific code.

Question 11

What is a friend function? What are the merits and demerits of using friend f…

Accepted Answer

A deep architectural analysis of the `friend` function, detailing how it mathematically violates standard encapsulation to access private data, alongside a rigorous evaluation of its critical merits (operator overloading) and severe demerits (security breaches).

Question 12

What do you mean by Dynamic initialization of objects?

Accepted Answer

A rigorous technical exploration of Dynamic Initialization, explaining how it aggressively defers memory allocation and variable assignment from compile-time to actual runtime using complex constructors and the `new` operator.

Question 13

When do we make a virtual function "pure"? What are the implications of makin…

Accepted Answer

A deep architectural explanation of Pure Virtual Functions, detailing how setting a function to `= 0` mathematically instantly transforms the class into an Abstract Base Class, strictly enforcing interface contracts on all derived subclasses.

Question 14

Write a class template to represent generic vector. Include member functions …

Accepted Answer

A fully functional, highly advanced C++ Class Template program demonstrating generic programming by creating a dynamic, mathematically rigorous Vector capable of handling any data type (int, float), including element modification, scalar multiplication, and formatted stream output.

Object Oriented Programming