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In c++ have a default constructor ?
ganga prasad rao.aloori
- Nov 26th, 2005
Yes in c++ a class can have a default constructor.a default constructor is a constructor which doesn't pass any arguements to it.
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What is the difference between Object and Instance?
anujaprasad2002
- Jul 18th, 2006
An object is an instance of a class.Suppose that class name is myclass class myclass{-----}When this myclass is called in mainmain(){ myclass cplus; /cplus is an object of the class m...
Priya Pise
- May 10th, 2006
Hi Ravi Shankar !I m not agree with u completely so can u plz enlight on the Instance again ..
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Classes
What error is caused by the following code ?class TemperatureList { public: TemperatureList( ); private: double * list; int size;};void func(Money amount);[...]int main{ TemperatureList list1; func(list1); return 0;}Choose one answer. a. double free b. divide by zero c. illegal argument d. no error
amithere007
- May 26th, 2011
The function func is taking an object of Money class which is not defined in this scope so that will give a compilation error. It will give the error as "Money' was not declared in this scope ".
wlochaty
- Jan 19th, 2011
c. illegal argument list1 object passed to a func() is diferent type than the func() param should be.func() expects an object of Money type.
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Difference between "C structure" and "C++ structure".
sachin_mundhra
- Dec 18th, 2009
No concept of encapsulation, code is different than the data in case of C structure. This is possible in C++ structure.
samitriani
- Jul 8th, 2008
C does not have limitation access. Structures in C are used to regroup data from different types.In C++ structure have limitation access propreties (private,public protected) with public access as default, can contain methods and can be used as a class.
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What is the difference between c&c++?
pammi_11
- May 31st, 2008
c is a procedural language. where as c++ is object oriented programming language.
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Why does constructor doesn't have a return type ?
Yaron Jackoby
- Jun 10th, 2011
The constructor just return the object itself.when you call to new you get the object. the new calls to the constructor of the class in order to create the object and the return value from the new is the pointer of the object so this is the return value.
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How to write a program such that it will delete itself after execution?
tahoekid
- Jun 13th, 2011
The Richter method does delete the original file, but the temporary file remains behind.? I compiled this as-is, and on Windows Server 2003, and 64 bit Windows 7, the temp file is not deleted. Presum...
kumar
- Mar 18th, 2006
if the solution is needed for the unix platform. Then you can create a pthread at the bottom of the program, take the current process id of the parent and make it a deamon by using the standard unix c...
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Acrobat Plug-in getting triggered automatically
HiI am new to this site and have no idea where to post this question. I will really appreciate if someone can help me solve this problem. I am developing an acrobat plug-in for Acrobat professional 9 which will export all annotations in original document into an xfdf document.The plug-in must get triggered on saving the original document after creation of annotation.For this I captured before save...
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What are auto static variables and auto extern variables?
Biju Nair
- Jun 29th, 2006
A variable declared in one file can be used in another file by declaring it as extern in the second file.
mohit12379
- Apr 20th, 2006
Neither there is a concept of auto static var and Nor a auto extern varibales because auto var are local variable whose lifetime is within a block and located on stack area . Process w...
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Why an empty Structure will occupy 2Bytes in C++
dkuy1
- Aug 9th, 2009
The Standard C++ language definition says: A class with an empty sequence of members and base class objects is an empty class. Complete objects and member sub-objects of an empty class type shall h...
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Why size of an empty function is 5?
rahilchoudhary
- Sep 28th, 2010
There is no function to calculate the size of a function.And this 5 value of an empty function is a myth.Certain working programs can even have size of 4.Regards
ajrobb
- Sep 22nd, 2010
It isn't.#include <iostream>void f() {}int main() { std::cout << sizeof f() << 'n'; // fails to compile on g++ because return is void std::cout << sizeo...
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Classes
How many parameters are there in a binary operator implemented as a friend?Choose one answer. a. 2 b. 0 c. 1 d. as many as you need
Oleg Alexandrov
- Jun 25th, 2011
Since it is a friend, it is not a member. So the syntax has to be operator myOperator(s1, s2). So there are two arguments.
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What is the difference between user defined object and Standard object?
Oleg Alexandrov
- Jun 25th, 2011
The difference pointed by the previous poster is very superficial. A "standard" object may have been defined by a "user", e.g., creator of a library.In C++ there is no discrimination against user-defi...
bornToLose
- Sep 22nd, 2007
Standard object is?that which is defined in header file which is develoved by C++ developer and contain in library of C++. It remain fix we cant make?different use. It is developed for specific purp...
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What are Virtual Functions? How to implement virtual functions in "C"
kamranahmad
- May 26th, 2008
Hi here i have more simplified example Hope this will give you clear view and check this linkhttp://www.codersource.net/published/view/325/virtual_functions_in.aspx#include <stdio.h>#include <...
SomGollakota
- Apr 21st, 2008
Sukesh, Your response is essentially correct if we are talking about pure virtual functions. However, when we talk about virtual functions, then we perhaps need to make a distinction between regu...
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What are the things contains in .obj file ? ( compiled result of .cpp file )
smart_coder
- Jan 25th, 2007
Object file is the representation of code that a compiler generates by processing a source code file. Object files contain compact code, often called "binaries". A linker is used to generate an execut...
divya
- Dec 22nd, 2006
I guess it contain stsrtup code assembly instruction which used by compiler to compile the code
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Inheritance
Which one of the following statements regarding C++ class inheritance is FALSE?
a. Inheritance promotes generic design and code reuse.b. Struct cannot be inherited in C++.
c. C++ supports multiple inheritance. d. Inheritance is a mechanism through which a subclass inherits the properties and behavior of its superclass.abhimanipal
- Feb 21st, 2010
The above answers are wrong. structs can be inherited in C++ . The only point to note is that for structs the defualt mode of inheritance for structs is public but for classes its private
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What is the difference between "overloading" and "overriding"?
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Editorial / Best Answer
Answered by: Richa
- Sep 28th, 2005
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.
swarn kant
- Mar 14th, 2006
All the above answers are right this is one more refinement.overridding is runtime polymorphism while overloading is compile time polymorphism.
priya
- Mar 5th, 2006
Overloading: the same function can perform different operations.overridding: the derived class can rewrite the content of the base class.
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C++ Interview Questions
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