Found 23 Articles for Software Engineering

What are the phases of Software Development Life Cycle (SDLC)?

Jaya P
Updated on 30-Jul-2019 22:30:24
Software Development Life Cycle (SDLC) describes the phases in the life cycle of a software application development. The entire process which starts from analysis and needs to develop software and finally after completion, implementation of the software and maintenance and support.The phases of SDLC are as followsRequirement gathering and analysis.Design.Coding and Implementation.Testing.Deployment.Maintenance.

Public Switched Telephone Network

karthikeya Boyini
Updated on 30-Jul-2019 22:30:23
Public Switched Telephone Network (PSTN) is an agglomeration of an interconnected network of telephone lines owned by both governments as well as commercial organizations. Properties of PSTN It is also known as Plain Old Telephone Service (POTS) It has evolved from the invention of telephone by Alexander Graham Bell. The individual networks can be owned by national government, regional government or private telephone operators. Its main objective is to transmit human voice in a recognizable form. It is an aggregation of circuit-switched networks of the world. Originally, it was an entirely analog network laid with copper cables ... Read More

Various Types of Keys in DBMS

David Meador
Updated on 30-Dec-2020 16:08:21
The different types of keys in DBMS are −Candidate Key - The candidate keys in a table are defined as the set of keys that is minimal and can uniquely identify any data row in the table.Primary Key - The primary key is selected from one of the candidate keys and becomes the identifying key of a table. It can uniquely identify any data row of the table.Super Key - Super Key is the superset of primary key. The super key contains a set of attributes, including the primary key, which can uniquely identify any data row in the table.Composite Key -  If ... Read More