The logical design is
more conceptual and abstract than the physical design
. In the logical design, you look at the logical relationships among the objects. In the physical design, you look at the most effective way of storing and retrieving the objects. Your design should be oriented toward the needs of the end users.
What is the difference between logical and physical design in SDLC?
Logical design maps the conceptual model to a particular DBMS model or a representation of the software. Physical design is
concerned with technical specifications
.
What is the difference between physical and logical?
The logical address is used like a reference, to access the physical address. The fundamental difference between logical and physical address is that
logical address is generated by CPU during a program execution whereas
, the physical address refers to a location in the memory unit.
What is logical and physical design in database?
Physical database design
represents the materialization of a database into an actual system
. While logical design can be performed independently of the eventual database platform, many physical database attributes depend on the specifics and semantics of the target DBMS.
What is the difference between logical model and physical model?
Logical data model defines the structure of the data elements and set the
relationships
between them. A Physical Data Model describes the database specific implementation of the data model.
Is IP address logical or physical?
An IP address is
a logical address
that is assigned by software residing in the router or server, and that logical address can change from time to time. For example, a laptop is likely to be assigned a new IP when it starts up in a different hotspot (see DHCP).
What is physical and logical network diagram?
Logical network diagrams
focus in on how traffic flows across the
network
, IP addresses, admin domains, how domains are routed, control points, and so on. … A
physical network diagram
will, ideally, show the
network
topology exactly as it is: with all of the devices and the connections between them.
Which is the logical design of database?
Logical database design is the
process of transforming (or mapping) a conceptual schema of the application domain into a schema for the data model underlying a
particular DBMS, such as the relational or object-oriented data model.
What is a logical design diagram?
The logical DFD
describes the business events that take place and the data required for each event
. It provides a solid basis for the physical DFD, which depicts how the data system will work, such as the hardware, software, paper files and people involved.
What is the logical design of database called?
This first task of designing a database is called logical design. … Data modeling. Logical data modeling is the process of documenting the comprehensive business information requirements in an accurate and consistent format.
What is physical design in database?
The physical design of your database
optimizes performance while ensuring data integrity by avoiding unnecessary data redundancies
. During physical design, you transform the entities into tables, the instances into rows, and the attributes into columns.
What are the three types of database design?
Types of database models
Relational model
.
Network model
.
Object-oriented database model
.
Entity-relationship model
.
What is the difference between physical and logical standby database?
The logical standby database is a database that does not have the schema structure exactly similar to the source database. In contrast, a physical standby database is a
database that replicates the exact contents of its primary database
across the Oracle Net Network layer.
What are examples of physical models?
- Model airplane.
- Model car.
- Model railway.
- Model rocket.
- Model house.
What are the three main types of models?
Contemporary scientific practice employs at least three major categories of models:
concrete models, mathematical models, and computational models
.
What are the two components of a logical data model?
The components of a logical data model include
Entities, Relationships, and Attributes
. Each Entity represents a set of persons, things, or concepts about which the business needs information. Each Relationship represents an association between two entities.
