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operating system

  operating system :- πŸ‘‰An operating system (OS) is software that manages computer hardware and provides services for computer programs. It acts as an intermediary between applications and the computer hardware, enabling users to interact with the computer and its resources efficiently. Key functions of an operating system include: Process Management : Handling processes, scheduling tasks, and managing resources like memory and CPU time. Memory Management : Allocating memory space to programs and data, and ensuring efficient use of available memory. File System Management : Organizing and managing files and directories on storage devices like hard drives. Device Management : Managing input and output devices such as keyboards, monitors, printers, and network interfaces. Security : Enforcing access control policies to protect data and resources from unauthorized access. User Interface : Providing a user-friendly interface (graphical or command-line) for users to interact with the co...

Type conversation and casting

Type conversation and  type casting  :- (i).  Type Conversion. :- The type conversion is the process of converting a data value from one data type to another data  type automatically by the compiler. Sometimes type conversion is also called implicit type conversion. The implicit type conversion is automatically performed by the compiler. For example, in c programming language, when we assign an integer value to a float variable the  integer value automatically gets converted to float value by adding decimal value 0. And when a  float value is assigned to an integer variable the float value automatically gets converted to an  integer value by removing the decimal value. To understand more about type conversion observe  the following... int i = 10 ; float x = 15.5 ; char ch = 'A' ; i = x ; =======> x value 15.5 is converted as 15 and assigned to variable i x = i ; =======> Here i value 10 is converted as 10.000000 and assigned to variable x i ...

decision making statemant

  What is Decision Making Statement? In the C programming language, the program execution flow is line by line from top to bottom. That means the c program is executed line by line from the main method. But this type of execution flow may not be suitable for all the program solutions. Sometimes, we make some decisions or we may skip the execution of one or more lines of code. Consider a situation, where we write a program to check whether a student has passed or failed in a particular subject. Here, we need to check whether the marks are greater than the pass marks or not. If marks are greater, then we decide that the student has passed otherwise failed. To solve such kind of problems in c we use the statements called decision making statements. Decision-making statements are the statements that are used to verify a given condition and decide whether a block of statements gets executed or not based on the condition result. n the c programming language, there are two decision-making...

Schema in computer science

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Schema  πŸ‘‡     πŸ‘‰πŸ»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. :- πŸ‘‰πŸ»        Student(AGE,ROLL NO.,REG.NO.,CLASS)   Here Student is an entity & other materials are attributes.   πŸ“šπŸ—ƒ️Now 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):- πŸ‘‰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...

Computer science modem

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  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...