Microsoft Visual C++ Master's

Explain Polymorphism and Flavors of Polymorphism...

noreply@blogger.com (Siebel Expert) — Mon, 31 Aug 2009 23:01:00 PDT

Polymorphism is the ability of different objects to react in an individual manner to the same message. This notion was imported from natural languages. For example, the verb "to close" means...

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Explain using static class member ..

noreply@blogger.com (Siebel Expert) — Sun, 30 Aug 2009 23:00:01 PDT

A class member declared static is a single instance of that member shared by all instances of this class (that's why it is sometimes termed a class variable, as opposed to object variable). This...

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Explain keyword friend...

noreply@blogger.com (Siebel Expert) — Sat, 29 Aug 2009 22:59:00 PDT

for A class can declare external functions or other classes as friends. Friendship grants full access to all of the grantor's members, even private and protected ones: void encrypt (string & rep)...

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Explain Mutable Object Member or data member

noreply@blogger.com (Siebel Expert) — Fri, 28 Aug 2009 22:59:00 PDT

When a data member is declared mutable, then it is legal to assign a value to it from a const member function. The following example may demonstrate when it is needed: class Buffer { void * data; ...

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Explain Calling an object's member function from its constructor

noreply@blogger.com (Siebel Expert) — Thu, 27 Aug 2009 22:58:00 PDT

An object's member functions (both virtual and non-virtual) can be called from its constructor. The invoked virtual is guaranteed to be the one defined in the current object (or higher, if it has not...

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explain Static member function

noreply@blogger.com (Siebel Expert) — Wed, 26 Aug 2009 22:58:00 PDT

A static member function in a class can access only other static members of a class or variables which are not members of its class. It can be invoked even without an object instance, unlike any...

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When is virtual inheritance needed?

noreply@blogger.com (Siebel Expert) — Tue, 25 Aug 2009 22:57:00 PDT

Multiple inheritance is a powerful and useful feature in C++, but it can lead to a problem known as the DDD or "Deadly Diamond of Derivation", as in this case: class ElectricAppliance{ int voltage,...

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IsA or HasA?

noreply@blogger.com (Siebel Expert) — Mon, 24 Aug 2009 22:56:00 PDT

When designing a class hierarchy, you may face a decision between inheritance (aka IsA ) vs. containment (aka HasA) relation. For instance, if you are designing a Radio class, and you already have...

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Why qsort is Still Useful in C++

noreply@blogger.com (Siebel Expert) — Sun, 23 Aug 2009 22:56:00 PDT

C++ defines a set of generic algorithms such as sort and find. However, the corresponding C algorithms, qsort and bsearch, are still useful in C++ programs for at least three reasons: • Legacy code....

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What is Early Binding and Dynamic Binding?

noreply@blogger.com (Siebel Expert) — Sat, 22 Aug 2009 02:00:02 PDT

The term binding refers to the connection between a function call and the actual code executed as a result of the call. Early Binding: If which function is to be called is known at the compile-time...

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What is the disadvantage of a template function?

noreply@blogger.com (Siebel Expert) — Fri, 21 Aug 2009 02:00:00 PDT

A template function cannot be distributed in the obj form. This is because, fuction with which parameters the template function is going to be called is decided at the run time only. Therefore an obj...

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Can we declare a static function as virtual?

noreply@blogger.com (Siebel Expert) — Thu, 20 Aug 2009 01:58:00 PDT

No. The virtual function mechanism is used on the specific object that determines which virtual function to call. Since the static functions are not any way related to objects, they cannot be...

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: Are there any new intrinsic (built-in) data types?

noreply@blogger.com (Siebel Expert) — Wed, 19 Aug 2009 01:57:00 PDT

Yes. The ANSI committee added the bool intrinsic type and its true and false value keywords. Other apparent new types (string, complex, and so on) are implemented as classes in the Standard C++...

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What problem does the namespace feature solve?

noreply@blogger.com (Siebel Expert) — Tue, 18 Aug 2009 01:57:00 PDT

Multiple providers of libraries might use common global identifiers causing a name collision when an application tries to link with two or more such libraries. The namespace feature surrounds a...

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How I can make sure that a single instance of my app should be executing at a time?

noreply@blogger.com (Siebel Expert) — Mon, 17 Aug 2009 04:28:00 PDT

Answers: Create one Mutex object with a unique name. Since Mutex is a Kernel object that can be identified uniquely and will be availble for all applications to check. ex. hMutex = CreateMutex (...

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When can you tell that a memory leak will occur?

noreply@blogger.com (Siebel Expert) — Sun, 16 Aug 2009 05:56:00 PDT