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Data Structures – Interview Questions and Answers for Freshers

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by September 12, 2015 Data Structure

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. What is the data structures used to perform recursion?

  •   Stack. Because of its LIFO (Last In First Out) property it remembers its ‘caller’ so knows whom to return when the function has to return. Recursion makes use of system stack for storing the return addresses of the function calls.
  •   Every recursive function has its equivalent iterative (non-recursive) function. Even when such equivalent iterative procedures are written, explicit stack is to be used.

3. What are the methods available in storing sequential files ?

  •  Straight merging,
  •   Natural merging,
  •   Polyphase sort,

         Distribution of Initial runs

4. List out few of the Application of tree data-structure?

  •  The manipulation of Arithmetic expression,
  •   Symbol Table construction,
  •   Syntax analysis.

5. What is a spanning Tree?

            A spanning tree is a tree associated with a network. All the nodes of the graph appear on the tree once. A minimum spanning tree is a spanning tree organized so that the total edge weight between nodes is minimized.

6. Whether Linked List is linear or Non-linear data structure?

   According to Access strategies Linked list is a linear one.
According to Storage Linked List is a Non-linear one.

7. 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

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