What is the difference between logical design and physical design?

What is the difference between logical design and physical design?

A physical design focuses on specific solutions explaining how they are assembled or configured. A logical design focuses on satisfying the design factors, including risks, requirements, constraints, and assumptions.

What is the difference between logical and physical model?

A logical data model is a model that describes data as much as possible, without regard to how they will be physically implemented in the database. In contrast, a physical data model is a model that represents how the actual database is built. Hence, this is the main difference between logical and physical data model.

What is the difference between logical and physical design network?

Logical design of a network consists of virtual design while the physical design of a network describes the hardware functions of the network. Logical designs determine the flow of data or communication between two networks while physical design is a communication between two computers connected with cables.

What is logical design in DBMS?

Definition. 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 the difference between logical and physical data independence?

Physical data independence is concerned mainly with how a set of data/ info gets stored in a given system. Logical data independence is concerned mainly with the changing definition of the data in a system or its structure as a whole.

What is the difference between logical and physical record?

A physical file can have a keyed sequence access path. This means that data is presented to a program in a sequence based on one or more key fields in the file. Logical files do not contain data. They contain a description of records found in one or more physical files.

What is the difference between physical and logical topology define different physical topologies that are used in network?

The network topology is a structure or the physical arrangement of the network devices, how the components of the network are interconnected with each other….Differences.

Physical Topology	Logical Topology
It is an actual route concerned with transmission.	It is a high level representation of data flow.

Is there a difference between physical and functional topologies?

Physical topology is basically the physical layout of the network media. In contrast, logical topology refers to the way, how data is transmitted throughout the network. The physical topology would not hinder the transmission of the data from one device to the other in a logical topology.

What is physical system design?

Physical Design It focuses on how data is entered into a system, verified, processed, and displayed as output. It produces the working system by defining the design specification that specifies exactly what the candidate system does. It is concerned with user interface design, process design, and data design.

What is logical system design?

Logical Design It is the abstract representation of the data flow, inputs, and outputs of the system. It explains the sources, destinations, data stores, and data flows all in a process that satisfies the user needs.

What is the difference between physical and logical data independence which one do you think is harder to achieve and why?

Logical data independence is more difficult to achieve than physical data independence, since application programs are heavily dependent on the logical structure of the data that they access.

What is logical and physical structure of database?

The logical units of database space allocation are data blocks, extents, segments, and tablespaces. At a physical level, the data is stored in data files on disk (see Chapter 11, “Physical Storage Structures”). The data in the data files is stored in operating system blocks.

What is logical file system in operating system?

The logical file system is the level of the file system at which users can request file operations by system call. This level of the file system provides the kernel with a consistent view of what might be multiple physical file systems and multiple file system implementations.

What is the difference between physical topology diagrams & logical topology diagrams?

A physical network topology diagram shows the structure of how devices are connected physically inside a network. A logical network topology diagram shows the logical method of communication used by the devices inside the network for network communication.

How does the logical topology differ from the physical topology Why can a single physical topology support multiple logical topologies?

What are the logical topologies?

Logical Topologies. 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. Each device is responsible for recognizing messages meant for it.

What is logical design and physical design in SDLC?

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 are system design requirements?

These requirements restrict system design through different system qualities. Performance, modifiability, availability, scalability, reliability, etc. are important quality requirements in system design. These ‘ilities’ are what we need to analyze for a system and determine if our system is designed properly.

What is the difference between physical and logical independence?