"Basic Introduction Of Programming Language:"

Basic Introduction Of Programming Language:

Definition Of Computer:-Computer Is an electronic device,which takes input user, process them and generate output accordingly requirements.

Difference Between Computer And Calculator;-using calculator we can perform only arithmetic operation and using computer we can perform arithmetic operation as well as logical operations.

Logical Operations Like: (20>10) T/F

O.S :-(Operating System)

     OS is a system software.it is a interface between user and computer hardware and computer HW does every work using OS, first of all OS perform booting process(means check all connected H/W)and provide one interface (Eg.Dos Prompt/Desktop).OS Opeartes Application SW(word,excel,IE,Windows Media Player)Software

System Software: Which is used to operate any hardware(system)

Application Software;Which is developed as per customer requirement.

EX: Banking S/W, Gaming , IRCTC S/W , Mobile App Etc.

FUNCTION OF OS

• Process Management
• Memory Management
• File Management
• Device Management
• Security
• System Performance

Process Management : In multitasking OS , we can execute more than one task simultaneously , and OS also support synchronization B/W all these processes.

Memory Management : In multitasking OS , this is the responsibility of OS to allocate memory(in ram)for their execution.

File Management : OS also support different functionlity related to file / directory like open a file, close file , create file / directory , copy, paste , rename , etc.

Device Management : Computer uses different input Output devices (sound card, graphics card , wifi , printer , kb etc ) and all devices work using drives. OS track all devices and assign task.

Security : OS prevent your computer by unauthorized access using passwords

System Performance : OS always watch system performance (its speed ) and record it and also improve its performance using some tools.

Computer Language :-It's a way of communication between user and computer.

 There are three categories of computer language

Low Level Language ;-It's a computer language , through which can directly interact with hardware , and it does not require compiler because through low level lang.We direct access registers.It is tough in learning due to its complex systaxes, and its use to implement assembly programming or SYSTEM SOFTWARE .

Example: assembly lang.and machine lang.(1,0)

Middle Level Language :- In middle level computer lang.we can make the programming of both levels , Low Level as well  as High Level .

Example : C and C++

High Level :- In High Level programming language , we always write programs in  ENGLISH , so it require compiler to convert High Level Lang. to Low Level  Lang.It is easy in learning due to its easy syntaxes and used to implement application software.

Example : Basic , Cobol , Pascal , Fortran , Java , PL/SQL , Python .....Etc

                                                                             _SHAHRUKH KHAN(SRK)