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 major difference between logical and physical view of a system in system analysis and design?
The basic difference between Logical and physical address is that
Logical address is generated by CPU in perspective of a program whereas the physical address is a location that exists 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 logical design of a relation?
Logical design
• The aim of logical design is
to construct a relational schema that correctly and efficiently represents all of the information described
by an Entity-Relationship schema produced during the conceptual design phase.
What is difference between logical and physical design?
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 relationship of database?
A logical database must be able to access and identify all files within the storage system to operate correctly, whereas a
physical database manages a much smaller field of information
. Sometimes, a physical database stores only a single file with one value or word in it.
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.
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.
Which is logical design in 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 are the main features of logical database design?
The characteristics of the logical data model include:
Features independent of specific database and data storage structures.
Specific entities and attributes to be implemented. Identification of the business rules and relationships between those entities and attributes.
What is the different between physical and logical entity relationship diagram?
They are used in different stages of development, and are inter-related. Logical ERD models information gathered from business requirements. … Physical ERD represents the
actual design of database
. It deals with conversion from logical design into a schema level design that will be transformed into relational database.
What are the 5 components of a network?
- Twisted pair cable.
- Coaxial cable.
- Fibre-optic cable.
How do you describe a network diagram?
A network diagram is a graphical representation of the project and is composed of a series of connected arrows and boxes to
describe the inter-relationship between the activities involved in the project
. Boxes or nodes represent the description of activities and arrows show the relationship among the activities.
What are the types of logical topology?
The two logical topologies are
broadcast (also known as bus) and sequential (also known as ring)
. In a broadcast topology, all devices on the network receive every message transmitted.
How do you explain logical ERD?
Logical ERD is a detailed version of a Conceptual ERD. A logical ER model is developed to enrich a conceptual
model by defining explicitly the columns in each entity and introducing operational and transactional entities
.
What is the difference between conceptual and logical design?
A conceptual data model is a model that helps to identify the highest-level relationships between
the different entities
, while a logical data model is a model that describes the data as much detail as possible, without regard to how they will be physically implemented in the database.
