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Object Oriented Concepts Questions and Answers

11.

When a programming Language has the capacity to produce new datatype, it is called as,

Exam Year(s)

UGC NET - 2012,

Answer: B

A programming language that can produce new data types is called an extensible language. Overloading means giving one name several meanings, encapsulation means hiding the data with the operations that use it, and abstraction means leaving out detail, so none of these is the property of creating new types. The keyed answer is Extensible Language.

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12.

Which of the following concepts means adding new concepts to a program as it runs ?

Exam Year(s)

UGC NET - 2013,

Answer: B

Adding new concepts to a program as it runs is dynamic loading: new classes or modules are loaded and linked while the program executes. Data hiding is about restricting access to data, dynamic typing is deciding the type of a value at run time, and dynamic binding is choosing which method is called at run time.

Dynamic typing and dynamic binding change how existing items behave but do not bring new concepts into a running program, so dynamic loading is the one described.

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13.

C++ actually supports the following two complete dynamic systems :

Exam Year(s)

UGC NET - 2013,

Answer: B

C++ supports two complete dynamic allocation systems: one defined by C (malloc and free) and one specific to C++ (new and delete). The statement that one is defined by C++ and the other not defined by C is not accurate, since the C system is defined by C.

Saying both are specific to C++ ignores malloc and free, and saying both are improvements of C is wrong because one of them is simply inherited from C.

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