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What is physical data structure and logical data structure?

Anonymous

∙ 11y ago

Updated: 8/11/2023

Physical data structure: This is the physical equipment involved in the network eg router, cabling etc).

Logical data structure: This is how the information flows internally and externally (the transfer of information from one node to another on the network).

Wiki User

∙ 11y ago

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Q: What is physical data structure and logical data structure?

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Is a linked list a physical data structure?

Physical data structures are how data is organized on a hardware storage device, and therefore how they appear to the computer. Logical or virtual data structures are software-based objects, and how the user or program sees it. Although many file systems use a type of linked list format for storing information, a linked list is used for both hardware and software purposes, and therefore it cannot fall under either the physical or virtual data structure classification.

Which one is a physical data structure?

tables

What is the Difference between physical DFD and logical DFD?

For a physical Data Flow Diagram you explore into the logical DFD. for example, if you have a data flow arrow declared as "customer information" now the physical DFD would include in that data flow arrow "customer information = customer_name + customer_address". something along these lines Physical DFD shows how various functions are performed and who does them but Logical DFD strips away all physical constraints but does not restrict physical happenings from taking place.

Distinguish between logical data independence and physical data independence?

logical data : refer to the immunity of the external scheme towards changes in the conceptual scheme.physical data: refer to the immunity of the conceptual scheme towards changes in the internal scheme.

What is physical dfd?

A Physical Data Flow Diagram is a diagram showing howparticular functions are performed within the data flow as opposed to a Logical DFD which only shows what functions are performed.

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Related Questions

Which data structure convert logical to physical address?

Linear data structure is used to convert the logical address to physical address .Stack is used in this and the various conversion such as postfix,prefix and infix notation are come in this

Is it harder to achieve logical data independence or physical data independence?

It is generally considered more difficult to achieve logical data independence compared to physical data independence. Logical data independence involves separating the conceptual structure of the data from the physical storage aspects, which can be complex depending on the database design. Physical data independence primarily deals with shielding the application from changes in the storage structure, which is usually more straightforward to achieve.

What is the difference between physical structure and logical structure of a disk?

Physical structure refers to the actual layout of data on the disk, including sectors, tracks, and cylinders. Logical structure refers to how the operating system organizes and accesses data on the disk, such as partitions, file systems, and directories.

Which data structure is used to convert logical address to physical addresss?

tgk dalam nota

How are the internal external and conceptual schemas related to concept of logical and physical data independence?

The internal schema represents the physical storage structure of data, the external schema represents how different users view the data, and the conceptual schema defines the logical structure of the entire database. Logical data independence means that the conceptual schema can change without affecting the external schemas, while physical data independence means that changes in the physical storage structures do not affect the conceptual or external schemas.

Is a logical unit of data and is a physical unit of data?

A logical unit of data is a virtual representation of data while a physical unit of data is the actual storage of data on a physical device. The logical unit of data is how data is organized and manipulated from a software perspective, while the physical unit of data is how data is stored on hardware such as disks or memory.

Which one between logical and physical data independent is harder to achieve and why?

the logical data independence is hard to achieve because all the manipulation is belonging in logical data independence but in physical data independence only show the physical view .

Is schema a logical structure or physical structure in oracle database?

the schema can be termed either conceptual or logical or physical. But mostly speaking, the term schema is used to refer to a logical structure.

What separates the physical aspect of data storage from the logical aspects of data representation?

A schema separates the physical aspect of data storagefrom the logical aspects of data representation.

What is logical file?

Logical file is a type of file that provides a view of the data stored into the Physical file. It does not contain data. A logical file contains only an index to the data stored into the physical file.

Difference between physical and logical DFD?

difference between physical and logical data flow diagrams.

What is the difference between logical database and physical database?

A logical database refers to the way data is organized, modeled, and accessed by users, focusing on the structure and relationships of data. In contrast, a physical database relates to how data is actually stored on disks, including indexes, partitions, and access paths designed for efficient data retrieval and storage.

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