Data Structures Section 1 - Technical Questions and Answers

Data Structures - Section 1

1.	What is data structure?
	Answer: 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. Workspace Report errors ... Name : Email: View Answer

2.	List out the areas in which data structures are applied extensively?
	Answer: Compiler Design, Operating System, Database Management System, Statistical analysis package, Numerical Analysis, Graphics, Artificial Intelligence, Simulation Workspace Report errors ... Name : Email: View Answer

3.	What are the major data structures used in the following areas : RDBMS, Network data model and Hierarchical data model.
	Answer: RDBMS = Array (i.e. Array of structures) Network data model = Graph Hierarchical data model = Trees Workspace Report errors ... Name : Email: View Answer

4.	If you are using C language to implement the heterogeneous linked list, what pointer type will you use?
	Answer: The heterogeneous linked list contains different data types in its nodes and we need a link, pointer to connect them. It is not possible to use ordinary pointers for this. So we go for void pointer. Void pointer is capable of storing pointer to any type as it is a generic pointer type. Workspace Report errors ... Name : Email: View Answer

5.	Minimum number of queues needed to implement the priority queue?
	Answer: Two. One queue is used for actual storing of data and another for storing priorities. Workspace Report errors ... Name : Email: View Answer

6.

What is the data structures used to perform recursion?

7.	What are the notations used in Evaluation of Arithmetic Expressions using prefix and postfix forms?
	Answer: Polish and Reverse Polish notations. Workspace Report errors ... Name : Email: View Answer

8.	Convert the expression ((A + B) * C - (D - E) ^ (F + G)) to equivalent Prefix and Postfix notations.
	Answer: Prefix Notation: - * +ABC ^ - DE + FG Postfix Notation: AB + C * DE - FG + ^ - Workspace Report errors ... Name : Email: View Answer

9.	Sorting is not possible by using which of the following methods? (Insertion, Selection, Exchange, Deletion)
	Answer: Sorting is not possible in Deletion. Using insertion we can perform insertion sort, using selection we can perform selection sort, using exchange we can perform the bubble sort (and other similar sorting methods). But no sorting method can be done just using deletion. Workspace Report errors ... Name : Email: View Answer

10.	What are the methods available in storing sequential files ?
	Answer: Straight merging, Natural merging, Polyphase sort, Distribution of Initial runs. Workspace Report errors ... Name : Email: View Answer

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