by Dinesh Thakur Category: Operating System

Cache definition : The Cache Memory (Pronounced as "cash") is the volatile computer memory which is very nearest to the CPU so also called CPU memory, all the Recent Instructions are Stored into the Cache Memory. It is the fastest memory that provides high-speed data access to a computer microprocessor. Cache meaning is that it is used for storing the input which is given by the user and which is necessary for the computer microprocessor to Perform a Task. But the Capacity of the Cache Memory is too low in compare to Memory (random access memory (RAM)) and Hard Disk.



 
by Dinesh Thakur Category: Operating System

Operating System Definition: It is a software that works as an interface between a user and the computer hardware. The primary objective of an operating system is to make computer system convenient to use and to utilize computer hardware in an efficient manner. The operating system performs the basic tasks such as receiving input from the keyboard, processing instructions and sending output to the screen.



 
by Dinesh Thakur Category: Operating System

Inter-Process Communication : Cooperating processes can communicate in a shared-memory environment. Cooperating processes communicate with each other via an Inter-Process-Communication (IPC) facility.

 
by Dinesh Thakur Category: Operating System

Both the Shell and the Kernel are the Parts of this Operating System. These Both Parts are used for performing any Operation on the System. When a user gives his Command for Performing Any Operation, then the Request Will goes to the Shell Parts, The Shell Parts is also called as the Interpreter which translate the Human Program into the Machine Language and then the Request will be transferred to the Kernel. So that Shell is just called as the interpreter of the Commands which Converts the Request of the User into the Machine Language. 

 
by Dinesh Thakur Category: Operating System

As we know that for performing any Operation as user must have to specify the Operation which he wants to Operate on the Computer. We can say that For Performing any Operation a user must have to Request for a Service from the System. For Making any Request a user will prepare a Special call which is also known as the System Call.

 
by Dinesh Thakur Category: Operating System

Multi programming: Multiprogramming is the technique of running several programs at a time using timesharing. It allows a computer to do several things at the same time. Multiprogramming creates logical parallelism. The concept of multiprogramming is that the operating system keeps several jobs in memory simultaneously.



 
by Dinesh Thakur Category: Operating System

There are Many Functions those are Performed by the Operating System But the Main Goal of Operating System is to Provide the Interface between the user and the hardware Means Provides the Interface for Working on the System by the user. The various Functions those are Performed by the Operating System are as Explained below:-

 
by Dinesh Thakur Category: Operating System

There are Many Operating Systems those have be Developed for Performing the Operations those are requested by the user. There are Many Operating Systems which have the Capability to Perform the Requests those are received from the System. The Operating system can perform a Single Operation and also Multiple Operations at a Time. So there are many types of Operating systems those are organized by using their Working Techniques.

 
by Dinesh Thakur Category: Operating System

It termed as First Come First Serve (FCFS) Scheduling. As its name implies, the process which arrives first in front of CPU for processing, then that process executed first. It is a non-preemptive scheduling algorithm which means in this priority of processing does not matter, i.e., whatever the priority may be the process executed in the manner they arrived.

It is also known as FIFO, i.e. first in first out. We can also write C/C++ program for first come first serve scheduling algorithm.

 
by Dinesh Thakur Category: Operating System

In this Technique The Operating System will Search for the Shortest time means this will search which job will takes a Less Time of CPU for Running. And After Examining all the jobs, all the Jobs are arranged in the Sequence wise or they are Organized into the Priority Order.

 
by Dinesh Thakur Category: Operating System

Definition: Round robin scheduling is the preemptive scheduling in which every process get executed in a cyclic way, i.e. in this a particular time slice is allotted to each process which is known as time quantum. Every process, which is present in the queue for processing, CPU is assigned to that process for that time quantum. Now, if the execution of the process gets completed in that time quantum, then the process will get terminate otherwise the process will again go to the ready queue, and the previous process will wait for the turn to complete its execution.

 
by Dinesh Thakur Category: Operating System

In the C-Scan all the Processes are Arranged by using Some Circular List. Circular List is that in which there is no start and end point of the list means the End of the List is the Starting Point of the list. In the C-Scan Scheduling the CPU will search for the Process from Start to end and if an End has Found then this again start from the Starting Process.

 
by Dinesh Thakur Category: Operating System

Mutex is a program object that allows multiple program threads to share the same resource, such as file access, but not simultaneously. When a program is started a mutex is created with a unique name. After this stage, any thread that needs the resource must lock the mutex from other threads while it is using the resource. The mutex is set to unlock when the data is no longer needed or the routine is finished.

 
by Dinesh Thakur Category: Operating System

Fragmentation occurs in a dynamic memory allocation system when many of the free blocks are too small to satisfy any request.

 
by Dinesh Thakur Category: Operating System

Semaphores are often used to restrict the number of threads than can access some (physical or logical) resource.

 
by Dinesh Thakur Category: Operating System

A Single Process may also contain sub Processes those are also known as the Child Process. So that we can say that a Process which is given to the System is also known as the Parent Process and all the other Parts of the Single Process are known as the Child Process. So that Every Process may also Contains Some Child process.

 
by Dinesh Thakur Category: Operating System

A process which is Executed by the Process have various States, the State of the Process is also called as the Status of the process, The Status includes whether the Process has Executed or Whether the process is Waiting for Some input and output from the user and whether the Process is Waiting for the CPU to Run the Program after the Completion of the Process.

 
by Dinesh Thakur Category: Operating System

Process: Process is the job which is the under Execution. Process is also known as the Running Job. For Execution there must be a System call which call the Processor or CPU for Performing any Operation. Process includes reading data from a File, Writing a Data from a File, Printing a document means to Say any Type of Operation is known as the Process. Every Process has some Attributes Like

 
by Dinesh Thakur Category: Operating System

After Detecting the Deadlock, we must have to Apply Some Conditions for Removing a Deadlock. After Examining the Four Conditions which Occurs deadlock. Means Detect how and why a deadlock has occurred. Avoidance and Prevention means handle the Deadlock or Remove the Deadlock. Or Make a Program to handle the Deadlock. Various Ways for handing a deadlock.

 
by Dinesh Thakur Category: Operating System

Dead-Lock is occurred in multiple users Computing Environment. As we know that there is Many Number of users those are going to perform their Transactions. Dead-Lock has occurred when two or More Users are requesting for data item or for a Resource of System for example two or more users Request for the Printers at a Same Time and When Dead-Lock has occurred.

 

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About Dinesh Thakur

Dinesh ThakurDinesh Thakur holds an B.C.A, MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.