Computer Science experts

Schema  👇     👉🏻Schema is logical representation of a data base.It is also known as entity type. Schema like a structure in which one or many tables lie.  E.g. :- 👉🏻        Student(AGE,ROLL NO.,REG.NO.,CLASS)   Here Student is an entity & other materials are attributes.   📚🗃️Now talking about   How many types of schema :-   There are three types of schema:- (i) View  Schema (ii) Conceptual Schema  (iii) Physical Schema  View schema :-( External level schema):- 👉It is also known as View level. View schema defines the design of database at the view level of data abstraction. It defines how an end user will intract with the database system. (There are many view schemas for database system .Every schema defines a specific group of data.  In other words we say like a Student entity represent specific attributes and other entities like Faculty, Infrastructure and so on represents specifi...

  Modem:- modem is stands for modulation and demodulation.It converts the digital signals into analouge data signals.It can be installed within computer development slot applicable for it.   Frequently types of modem  :- Frequently there are two types of modem which follows as  (i)Standard modem (ii)window modem Standard modem:-   standard modem is used generic device drivers  . Standard modem has of two types internal and external. Internal modem do not need much standard structure.But external modem is connected through one of the Com port to the computer through a cable and this cable is called null cable. Window modem :- window modem is a secret plug or plays tool. It requires a perticular device driver.  Generally types of modem:-  (i)Optical modem (ii) Digital modem (iii) Acoustic modem (iv)Smart modem (v) Short haul modem  Optical modem :-   optical modem uses optical cables instead of other metalic media.It converts dig...