well, the software and the memory.....to fix the problems automatically...there are settings on automatic software settings that allow you to make adjustments automatically on your computer
disk scanner
True.
difference between physical and logical data flow diagrams.
Yes, a physical topology can support multiple logical topologies.
* 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.
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 a proper reason.
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.
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.
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 .
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.
logical plan