What is dynamic binding?

Correct Answer: A default constructor is a constructor that either has no parameters, or if it has parameters, all the parameters have default values

Correct Answer: Copy constructor is a constructor function with the same name as the class and used to make deep copy of objects

Correct Answer: ConstKeyword indicates that memory once initialized, should not be altered by a program Volatile keyword indicates that the value in the memory location can be altered even though nothing in the program Mutable keyword indicates that particular member of a structure or class can be altered even if a particular structure variable, class, or class member function is constant

Correct Answer: A reference variable provides an alias to a previously defined variable Data -type & reference-name = variable name

Correct Answer: A destructor is automatically called when the object is destroyed A virtual destructor in C++ is used primarily to prevent resource leaks by performing a clean-up of the object

Correct Answer: The C++ language provides a single global namespaceNamespaces allow to group entities like classes, objects and functions under a name

Correct Answer: Late binding refers to function calls that are not resolved until run time Virtual functions are used to achieve late binding When access is via a base pointer or reference, the virtual function actually called is determined by the type of object pointed to by the pointer

Correct Answer: Early binding refers to the events that occur at compile time Early binding occurs when all information needed to call a function is known at compile time Examples of early binding include normal function calls, overloaded function calls, and overloaded operators The advantage of early binding is efficiency

Correct Answer: Multiple inheritance is a feature in C++ by which one class can be of different types Say class teaching Assistant is inherited from two classes say teacher and Student

Correct Answer: The free subroutine frees a block of memory previously allocated by the malloc subroutine Undefined results occur if the Pointer parameter is not a valid pointer If the Pointer parameter is a null value, no action will occur The realloc subroutine changes the size of the block of memory pointed to by the Pointer parameter to the number of bytes specified by the Size parameter and returns a new pointer to the block The pointer specified by the Pointer parameter must have been created with the malloc, calloc, or realloc subroutines and not been deallocated with the free or realloc subroutines Undefined results occur if the Pointer parameter is not a valid pointer