Some Questions Answers:- What is the difference between a NULL pointer and a void pointer?

A NULL pointer is a pointer of any type whose value is zero. A void pointer is a pointer to an object of an unknown type, and is guaranteed to have enough bits to hold a pointer to any object. A void pointer is not guaranteed to have enough bits to point to a function (though in general practice it does)

What is encapsulation technique?

Hiding data within the class and making it available only through the methods. This technique is used to protect your class against accidental changes to fields, which might leave the class in an inconsistent state.

Definition of Object Oriented Programming in single line?

Object oriented programming is a programming paradigm which  uses objects and its interactions to design applications  and computer programs.

What is virtual function?

The virtual keyword means that method, property or function can be overridden

What’s a Windows process?

It’s an application that’s running and had been allocated memory.

What is programming?

Computer programming is writing or editing a computer program. A computer program is a set of instructions which determine how the computer will react to input when that program is running.

What is a debugger?

debugger is a program in which you run another program that you are trying to debug. Inside a debugger, you can step through your program one line or instruction at a time, set break points and have your program run until it hits one, examine the contents of variables and memory, and such other useful things as that.

what is a Programming language?

A programming language is a stylized communication technique intended to be used for controlling the behavior of a machine (often a computer). Like human languages programming languages have syntactic and semantic rules used to define meaning.

What's the difference between a programming language, a scripting language?

The main difference between a "programming language" (C, C++ etc.) and a "scripting language" (ASP, JSP, JavaScript, VBScript) is that code written in a programming language needs to be compiled before it is run. Once it is compiled, it can be run any number of times. Scripting languages, on the other hand, are interpreted at run-time. This means that every time you want to run the program, a separate program needs to read the code, interpret it, and then follow the instructions in the code. Compiled code has already been interpreted into machine language, so it is will typically execute faster because the conversion into machine language has already been done.

What is difference between overloading and overriding?

Same methods (Names are same) with different signature (parameters) is called overloading, while having same name and parameter functions in base and drive class called overriding.

What are the advantages of OOPS?

Advantages of OOPS are Re-usability, Maintainability, Extensibility, Modifiability, Modularity, Simplicity

What are the features of OOPS?

These are the main features of OOPS, a) Abstraction b) Encapsulation c) Inheritance d) Polymorphism

What is Class and Object

A Class is blueprint or a template to create an Object. Whereas an Object is a an actual instance of a Class.

Explain modeling and its advantages?

Modeling is a proven and well-accepted engineering technique which helps build a model. Model is a simplification of reality; it is a blueprint of the actual system that needs to be built.

What are the various types of Software Testing?

There are 7 different types of testing are done for a project, they are a) Unit Testing, b) Integration Testing, c) System Testing, d) Acceptance Testing, e) Alpha and Beta Testing, f) Black Box Testing and g) White Box Testing

What is ER Diagram

ER model is a conceptual data model that views the real world as entities and relationships. A basic component of the model is the Entity-Relationship diagram which is used to visually represents data objects.

Write a program to add two numbers without using arithmetic operator?

public static void main(String args[]) { int a=3,b=5; While(b--) a++; System.out.println("sum is"+a); }

Write a program to swap two numbers without using a temporary variable.

public static void main() { int a=4,b=5; a=a+b; //a=9 b=a-b; //b=4 a=a-b; //a=5 System.out.println("After swapping"+a,+b); }

Write a program to find largest of 2 numbers without using if-else

void main() { cin>>a>>b;; //let a=3and b=2 float c=|(a+b)|/2+|(a-b)|/2; //c=2.5+0.5=3.0 cout<<"largest number is"<<c; }