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In record design we distinguish between logical and physical records. LOGICAL RECORDS: A logical record maintains a logical relationship among all the data items in the records.It is the way the programmer or user sees the data.IN CONTRAST, A PHYSICAL RECORD is the way data are recorded on a storage medium.The programmer doesnt know about the physical map on the disk.The software presents the logical record in the required sequence.The capability is unique to the data base design. This question is answered by Silpa Sonali Sahoo.I request all the User if you can give some extra knoweldge/idea based on the discussed topic then you are most welcome.
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How can one calculate the physical address from a given logical address?
To calculate the physical address from a logical address, you can use the base address and offset. Add the base address to the offset to get the physical address. This process is commonly used in computer systems to translate logical addresses to physical addresses for memory access.
What is a physical port?
A physical port, as opposed to a virtual or logical port is an interface on a computer into which you can insert a connector for a device.
Physical address and logical address?
A logical (or virtual) address is a reference to a memory location independent of the current assignment of data to memory; a translation must be made to a physical address before the memory access can be achieved. A relative address is the address expressed as a location relative to some known point, usually the beginning of the program. A physical address, or absolute address, is an actual location in main memory.
Which OSI layer addresses data messages translates logical addresses into actual physical addresses and routes data to addresses on the networks?
Network layer
What is logical link control and medium access control?
Logical link control manages traffic in the Open Systems Interconnection and identifies line protocols including NetBIOS or NetWare. Medium Access Control is responsible for sharing physical connection to the network amongst numerous computers via Ethernet.
What is difference between logical file and physical file?
* Physical file (PF) contains the data and have only one record format. Logical file (LF) is a view of the physical file which does not contain any data may be based on one physical file or more then one physical file. Logical file can have more then one record format. Logical can be non join or join logical file. Performance becomes better if you use the logical file in the program.
Where WRITE statement will always place a record in the next physical position?
The WRITE statement in a programming language like COBOL will always place a record in the next logical position for sequential files. This means that the next record will be written at the end of the file, regardless of the physical location of the record.
What is the Logical drive and physical drive?
* Physical file (PF) contains the data and have only one record format. Logical file (LF) is a view of the physical file which does not contain any data may be based on one physical file or more then one physical file. Logical file can have more then one record format. Logical can be non join or join logical file. Performance becomes better if you use the logical file in the program.
Difference between physical and logical DFD?
difference between physical and logical data flow diagrams.
Can a single physical topology support multiple logical topology?
Yes, a physical topology can support multiple logical topologies.
Which technologies use token passing method and a physical star but logical ring topology?
token ring uses a physical star and a logical ring ,while FDDI uses a physical star/ring and a logical ring.
Can a single physical topology support multiple logical topologies give the reason?
Can a single physical topology support multiple logical topologies give a proper reason.
What is the difference between virtual logical and physical address spaces?
The concept of a logical address space is simply involved the process of mapping the Logical addresses to their Physical Addresses . Logical addresses are generated by the CPU; also referred to as virtual addresses.while Physical Address is the actual address of the data stored on the physical device and mapped by MMU.
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.
Is an instant message session a logical connection or a physical connection?
Meh, it's Logical.
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 .
What are the difference between logical and physical tag?
While physical tags are also referred to as presentational mark-up, logical tags are useless for appearances. Physical tags are newer versions while logical tags are old and concentrate on content.
