data structure notes bcs bca computer science
data structure notes bcs bca computer science
A data structure is a storage that is used to store and organize data.
It is a way of arranging data on a computer so that it can be accessed and updated efficiently.
A data structure is not only used for organizing the data. It is also used for processing, retrieving, and storing data. There are different basic and advanced types of data structures that are used in almost every program or software system that has been developed
Depending on your requirement and project, it is important to choose the right data structure for your project. For example, if you want to store data sequentially in the memory, then you can go for the Array data structure.
Data :
Data are simply values or sets of values.
Data items:
Data items refers to a single unit of values. Data items that are divided into sub-items are called Group items. Ex: An Employee Name
may be divided into three subitems- first name, middle name, and last name.
Data items that are not able to divide into sub-items are called Elementary
items. Ex: SSN.
Entity:
An entity is something that has certain attributes or properties which may be
assigned values. The values may be either numeric or non-numeric.
Ex: Attributes- Names, Age, Sex, SSN
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