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Data Structure Question and Anwers

1. What is data structure? A data structure is a way of organizing data that considers not only the items stored, but also their relationship to each other. Advance knowledge about the relationship between data items allows designing of efficient algorithms for the manipulation of data. 2. List out the areas in which data structures are applied extensively? Compiler Design, Operating System, Database Management System, Statistical analysis package, Numerical Analysis, Graphics, Artificial Intelligence, Simulation 3. What are the major data structures used in the following areas : RDBMS, Network data model & Hierarchical data model. RDBMS – Array (i.e. Array of structures) Network data model – Graph Hierarchical data model – Trees 4. If you are using C language to implement the heterogeneous linked list, what pointer type will you use? The heterogeneous linked list contains different data types in its nodes and we need a link, pointer
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C and C++ Program important questions

C, C++ Interview Questions   1) What is virtual Constructors/Destructors Virtual destructors:  If an object (with a non-virtual destructor) is destroyed explicitly by applying the delete operator to a base-class pointer to the object, the base-class destructor function(matching the pointer type) is called on the object. There is a simple solution to this problem – declare a virtual base-class destructor. This makes all derived-class destructors virtual even though they don’t have the same name as the base-class destructor. Now, if the object in the hierarchy is destroyed explicitly by applying the delete operator to a base-class pointer to a derived-class object, the destructor for the appropriate class is called. Virtual constructor: Constructors cannot be virtual. Declaring a constructor as a virtual function is a syntax error.  2) Does c++ support multilevel and multiple inheritance?  Yes.  3) What are the advantages of inheritance?  • It permits code reusability. • Reusability save
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