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C++/OOPS Interview Questions With Answers - Part VIII.


Here, are some sample questions based on "C++/OOPS Programming language". Read it carefully as these questions will help you in cracking any interview.


36) What is a copy constructor?

Answer: A constructor that initializes an object using values of another object passed to it as parameter is called copy constructor. It creates the copy of the passed object. The format of declaration is:
classname (classname &)


37) What is a default constructor? What is its role?

Answer: A default constructor is the one that takes no arguments. It is automatically invoked when an object is created without providing any initial values. In case, the programmer has not defined a default constructor, the compiler automatically generates it.


38) What is meant by constructor overloading?

Answer: Constructor overloading refers to a class having multiple constructor definitions, each having a different signature.


39) What is operator overloading?

Answer: Operator overloading is a specific case of polymorphism in C++. In operator overloading, different operators have different implementations, depending on their arguments.


40) What operators can/cannot be overloaded?

Answer: Most can be overloaded. The only C++ operators that can't be are . and ?: (and sizeof, which is technically an operator). C++ adds a few of its own operators, most of which can be overloaded except :: and .*.



ALSO READ:

Frequently Asked C++/OOPS Interview Questions With Answers – 9.

Frequently Asked C++/OOPS Interview Questions With Answers – 10.

Frequently Asked C++/OOPS Interview Questions With Answers – 11.

Frequently Asked C++/OOPS Interview Questions With Answers – 11.

Frequently Asked C++/OOPS Interview Questions With Answers – 12.

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