What is an explicit constructor? C++

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A conversion constructor declared with the explicit keyword. The compiler does not use an explicit constructor to implement an implied conversion of types. It’s purpose is reserved explicitly for construction.

2012-03-21, 2920👍, 0💬

Will the following program execute? C++
Will the following program execute? C++ Will the following program execute? void main() { void *vptr = (void *) malloc(sizeof(void)); vptr++; } Answer1 It will throw an error, as arithmetic operations cannot be performed on void pointers. Answer2 It will not build as sizeof cannot be applied to void... 2012-03-23, 3254👍, 0💬

Explain the ISA and HASA class relationships. How would you implement each in a class design?
Explain the ISA and HASA class relationships. How would you implement each in a class design? A specialized class "is" a specialization of another class and, therefore, has the ISA relationship with the other class. An Employee ISA Person. This relationship is best implemented with inheritance. Empl... 2012-03-19, 3180👍, 0💬

Are there any new intrinsic (built-in) data types?
Are there any new intrinsic (built-in) data types? Yes. The ANSI committee added the bool intrinsic type and its true and false value keywords. 2012-03-23, 2935👍, 0💬

What is an explicit constructor? C++
What is an explicit constructor? C++ A conversion constructor declared with the explicit keyword. The compiler does not use an explicit constructor to implement an implied conversion of types. It’s purpose is reserved explicitly for construction. 2012-03-21, 2921👍, 0💬

What is the Standard Template Library (STL)?
What is the Standard Template Library (STL)? A library of container templates approved by the ANSI committee for inclusion in the standard C++ specification. A programmer who then launches into a discussion of the generic programming model, iterators, allocators, algorithms, and such, has a higher t... 2012-03-21, 2907👍, 0💬

What is a mutable member? C++
What is a mutable member? C++ One that can be modified by the class even when the object of the class or the member function doing the modification is const. 2012-03-20, 2898👍, 0💬

When should you use multiple inheritance?
When should you use multiple inheritance? There are three acceptable answers: "Never," "Rarely," and "When the problem domain cannot be accurately modeled any other way." 2012-03-19, 2877👍, 0💬

What problem does the namespace feature solve?
What problem does the namespace feature solve? 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 library’s external declarations with a unique namespace tha... 2012-03-22, 2854👍, 0💬

When is a template a better solution than a base class?
When is a template a better solution than a base class? When you are designing a generic class to contain or otherwise manage objects of other types, when the format and behavior of those other types are unimportant to their containment or management, and particularly when those other types are unkn... 2012-03-20, 2732👍, 0💬

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