In C++, what is the difference between method overloading and method overriding?Overloading a method (or function) in C++ is the ability for functions of the same name to be defined as long as these methods have different signatures (different set of parameters). Method overriding is the ability of the inherited class rewriting the virtual method of the base class.
What methods can be overridden in Java? In C++ terminology, all public methods in Java are virtual. Therefore, all Java methods can be overwritten in subclasses except those that are declared final, static, and private.
In C, what is the difference between a static variable and global variable? A static variable declared outside of any function is accessible only to all the functions defined in the same file (as the static variable). However, a global variable can be accessed by any function (including the ones from different files).
In C, why is the void pointer useful? When would you use it? The void pointer is useful becuase it is a generic pointer that any pointer can be cast into and back again without loss of information.
What are the defining traits of an object-oriented language? The defining traits of an object-oriented langauge are:
Please note that in case the base class has a non virtual function and derived class implements a function with the same prototype, the compiler would signal an error(derived class function hiding the base class implementation)
I am very confused, when the answer mentioned override must be virtual function. Ashish Ujwal’s comment even more confused me. I just tried VC++, I did not get any compiling error.
Please note that in case the base class has a non virtual function and derived class implements a function with the same prototype, the compiler would signal an error(derived class function hiding the base class implementation) ”
I tried exactly the similar functionality defining void print() function in both base and derived class. It compiles and runs perfectly fine without any errors in g++. So, in what case does the error you have described has occurred.
8 Comments on C++ interview questions, some Java
Please note that in case the base class has a non virtual function and derived class implements a function with the same prototype, the compiler would signal an error(derived class function hiding the base class implementation)
Question’s are good but add something related to OOPS and Macro’s
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I am very confused, when the answer mentioned override must be virtual function. Ashish Ujwal’s comment even more confused me. I just tried VC++, I did not get any compiling error.
Thanks you for your grat service.. Please try to include more questions and answers from MFC.
Thanks & Regards
Rakesh Nhalil Edavalath
Hai friends,
I want to execute the PL/SQL program to findout the maximum of given 10 numbers.
i.e.,
Declare
n number(5):=&n;
big number(5);
i number(2):=1;
Begin
big:=n;
for i in 2..10
loop
n:=&n;
if big
I need code for reverse of a string without using string functions in C++
As Ashish Ujwal told “#
Please note that in case the base class has a non virtual function and derived class implements a function with the same prototype, the compiler would signal an error(derived class function hiding the base class implementation) ”
I tried exactly the similar functionality defining void print() function in both base and derived class. It compiles and runs perfectly fine without any errors in g++. So, in what case does the error you have described has occurred.