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31-07-2017, 11:50 PM

I love this book
And author write this book in very simple language
So all students learning easily

jaseela123d · 02-08-2017, 12:00 PM

In computing a data structure is a particular way of organizing the data into a computer so that it can be used efficiently. Data structures can implement one or more specific abstract data types (ADTs), which specify the operations that can be performed on a data structure and the computational complexity of those operations. In comparison, a data structure is a concrete implementation of the specification provided by an ADT.

Different types of data structures fit different types of applications, and some are highly specialized for specific tasks. For example, relational databases often use B-tree indexes for data retrieval, while compiler implementations typically use hash tables to search for identifiers.

Data structures provide a means for efficiently managing large amounts of data for uses such as large databases and Internet indexing services. Efficient data structures are typically key to designing efficient algorithms. Some formal design methods and programming languages emphasize data structures, rather than algorithms, as the key organizing factor in software design. Data structures can be used to organize the storage and retrieval of stored information in both main memory and secondary memory.

Data structures are generally based on the ability of a computer to search and store data anywhere in its memory, specified by a pointer-a bit string, representing a memory address, which can be stored in memory and Manipulated by the program. Therefore, the matrix and register data structures are based on calculating the addresses of data elements with arithmetic operations; While linked data structures are based on storing addresses of data elements within the structure itself. Many data structures use both principles, sometimes combined in non-trivial ways (as in XOR binding).

The implementation of a data structure usually requires writing a set of procedures that create and manipulate instances of that structure. The efficiency of a data structure can not be analyzed separately from those operations. This observation motivates the theoretical concept of a type of abstract data, a data structure that is defined indirectly by the operations that can be performed on it, and the mathematical properties of those operations (including their space and time cost).

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