Techy Drift

 An operating system is a program that manages the computer hardware.      It also provides a basis for application programs and acts as a intermediary between computer user and computer hardware. The operating system is large and complex. It is divided into separate subsystems, each with carefully defined functions, input, output and function. This arrangement and relationship between subsystems or components of a complex system is called operating system structure. Simple Structure      Some systems do not have a well defined structure. such system does not break the system into subsystems, and has no distinction between user and kernel modes. this system allows all programs direct access to the underlying hardware.     MS DOS  is the best example of such a system. A few people  was originally designed and implemented it. And gradually DOS became popular and important.     This simple layered approach is used by the original UNIX operating system. Almost all OS is in one large layer,

variables,the name itself implies that a variable is something which can change.  Variables are like containers for storing  our data values in memory. we can change the data in variables, in python everything is an object and variables are like names given to the object, by labeling them we can easily access them. In other high level languages like C programming language, c++ programming language, and java programming language. etc.,   we need to declare the datatype of the variable , but in python it will automatically recognize the type of data you are storing in a variable. ** Remember that a variable is a name which is given to a value not to the memory. Declaring a variable is very easy you need to assign a value or a string using '=' operator. >>> p=9 >>> print(p) 9 Assigning a single value to multiple variables We can assign a single value to multiple variables.  >>> a=b=c=56 >>> a 56 >>> b 56 >>> c 56 Assigning diff

1. To Check if the given number is even or odd If a number is completely divided by 2 then it is even number. When the number is divided by 2, we use the remainder operator %  to calculate the remainder. If the remainder is not zero, the number is odd. SOURCE CODE:- n= int ( input ( "enter any number:- " )) if (n% 2 == 0 ): print (n , 'is even number' ) else : print (n , 'is odd number' ) OUTPUT 1st Run enter any number:- 2 2 is even number 2nd Run enter any number:- 3 3 is odd number In the above code we use "Simple if" statement.  In the above program, we ask the user for input and check if the number is odd or even. 2.Factorial number Factorial of a number defined as the product of all numbers from 1 to given number. For example  5!(5 factorial)=5*4*3*2*1 is 120. Note = factorial of 0 is 1 SOURCE CODE n= int ( input ( "Enter any number:- " )) fact= 1 for i in range ( 1 , n+ 1 ): fact=fact*i print ( 'factorial of' ,

 Based on number of general purpose processors computer systems are classified into three types.They are: Single Processor Systems. Multiprocessor Systems. Clustered Systems. Single Processor Systems From the name it is very clear that it has only single processor. A major central processing unit that can execute a set of general utility instructions, including user process instructions. There are some other special purpose processors present that performs device specific task. In the single processor system apart from the main central processing unit(CPU) there are also other processors which are present which does not do the general purpose task but it performs some device specific task. It means that we have a certain devices in our computers like keyboard, disk, etc. for all this they may be some microprocessor  which is specified to do a specific task related to that device like for example keyboard, when we press a key on our keyboard the keystroke has to be converted to some kin

 Types of Operating System Batch Operating system Time sharing Operating system Distributed Operating system Network Operating system Real Time Operating system Multi programming/Processing/Tasking Operating system Mobile Operating System Batch Operating System               In a Batch operating system the similar jobs are grouped together into batches with the help of some operators and these batches are executed one by one. For example, suppose we have ten programs, some are written in c++ programming language, Some are written in c programming language and the rest are written java programming language. Now, every time we run these programs one by one, we have to load the compiler of that particular language and then run the code. But if we do a batch of these ten programs, The advantage with this approach is that for the c++ batch, you only need to load the compiler once. Similarly, for Java and C , the compiler only needs to load once and the entire batch is executed. The followin

 Operating System is an interface between the user and the hardware and enables the interaction of a computer's hardware and software.          Also, an operating system is software that performs all the basic functions of file management, storage management, process management, managing input and output, and controlling peripherals such as disk, drivers and printers. Functions of Operating System Device Management  File Management Memory Management Process Management Mastermind Storage Management Handling input/output operations Security Functions of Operating System Device Management          Operating system manages device communication via their respective drivers. It does the following activities for device management: Keeps tracks of all devices, input/output controller is responsible for this task. Decides which process gets the device when and for how much time Allocates the device in an efficient way. De-allocates devices. File Management           The operating system al