Tech Differences

The virtual function and pure virtual function both are the concepts of run time polymorphism. Polymorphism is supported by both the languages C++ and Java. In Java, the term "overriding" is used instead of 'virtual function', as the virtual function is the term of C++. The main difference between 'virtual function' and 'pure virtual function' is that 'virtual function' has its definition in the base class and also the inheriting derived classes redefine it. The pure virtual function has no … [Read more...]

In C++ and Java, there are two ways to call a function or a method. The first is "call by value" and the second is "call by reference". Call by value method passes only the value of a variable to the function code, and if there is any change in the value of a variable inside that function it does not affect the original value of that variable. In call by reference method, we pass the variable itself in an argument, and the change in the value of a variable also affects the original value of that … [Read more...]

An array is a collection of variables that are of similar data types and are referred by a common name. A specific element in an array is accessed by a particular index of that array. Arrays in Java work differently as compared to C++. The main topic of our discussion is the difference between One-dimension and Two-Dimension array. A one-dimensional array is a list of variables with the same datatype, whereas the two-Dimensional array is 'array of arrays' having similar data types. C++ do not … [Read more...]

Both "break" and "continue" are the 'jump' statements, that transfer control of the program to another part of the program. C++ supports four jump statements namely  'return', 'goto', 'break' and 'continue'. Java supports three jump statements 'break' 'continue' and 'return'. The main difference between break and continue is that break is used for immediate termination of loop whereas, continue terminate current iteration and resumes the control to the next iteration of the loop. Let's study the … [Read more...]

The two terms "type casting" and "type conversion" occur when there is a need to convert one data type to another. When the two types are compatible with each other, then the conversion of one type to other is done automatically by the compiler. However there is a basic difference between type conversion and type casting i.e. type conversion is done "automatically" by compiler whereas, type casting is to be "explicitly done" by the programmer. Let's discuss the difference both type casting and … [Read more...]

Association of a 'function definition' to a 'function call' or an association of a 'value' to a 'variable', is called 'binding'. During compilation, every 'function definition' is given a memory address; as soon as function calling is done, control of program execution moves to that memory address and get the function code stored at that location executed, this is binding of 'function call'  to 'function definition'. Binding can be classified as 'static binding' and 'dynamic binding'. If it's … [Read more...]

As we discussed earlier, a variable is a name, given to a memory location and it must be declared before it is used. In C, all the variables are declared at the starting of the program. In C++, variables can be declared, at any point of time, before they are used in the instructions. Variables are further classified into 'local' and 'global' variable, which is the main topic of our discussion. Here the main difference between a local and a global variable is that, a local variable is declared … [Read more...]

The word 'identifier' clearly defines itself, an identifier is a name given to an entity, which distinctly identifies an entity in a program at the time of its execution. Variable is also an identifier, its name uniquely identifies itself in a program. Here, the fundamental difference between an identifier and variable is that an identifier is a "name given to entity" in a program whereas, a variable is a "name given to memory location", that is used to hold value, which may get modified during … [Read more...]

Every language has keywords and identifiers, which are only understood by its compiler. Keywords are predefined reserved words, which possess special meaning. Each keyword defines the "type" declared data. Keywords should not be used as identifiers. An identifier is a unique name given to a particular variable, function or label of class in the program. To create a variable both a keyword and an identifier are bind together. This content further elaborates the difference between keyword and an … [Read more...]

Polymorphism is one of the crucial features of OOP.  It simply means 'using one name for multiple forms'. Polymorphism can be implemented using 'function overloading', 'operator overloading' and 'virtual function'. Both, 'overloading' and 'overriding' implies the concept of polymorphism. Here, 'overloading' is compile time polymorphism and 'overriding' is run time polymorphism. Studying further, if we talk about the major difference in 'overloading' and 'overriding'. In 'overloading' we redefine … [Read more...]