Found 700 Articles for Computer Science

Difference between Traditional and Reactive Computer System

Pradeep Kumar
Updated on 12-Jul-2023 12:06:40

124 Views

The terms "traditional computer system" and "reactive computer system" are not widely used or well−defined in the field of computer science. However, based on their general meanings, we can discuss the possible differences between these two concepts. What is Traditional Computer System? A traditional computer system refers to a standard computing model that follows a sequential execution flow. It typically operates on a set of predefined instructions or programs and performs computations in a deterministic manner. In a traditional computer system, the processing of tasks is usually initiated by the user or by a scheduled program, and the system responds ... Read More

Difference between Turn Around Time (TAT) and Waiting Time (WT) in CPU Scheduling

Pradeep Kumar
Updated on 12-Jul-2023 12:15:34

509 Views

CPU scheduling is a crucial aspect of operating systems that determines the order in which processes are executed on the central processing unit (CPU). Two important metrics used to evaluate the efficiency of CPU scheduling algorithms are Turn Around Time (TAT) and Waiting Time (WT). Understanding the difference between these two metrics can provide insights into the performance and responsiveness of a CPU scheduling algorithm. What is Turn Around Time (TAT)? Turn Around Time (TAT) is the total time taken for a process to complete its execution from the moment it enters the system until it finishes. It includes both ... Read More

Difference between Transfer Time and Disk Access Time in Disk Scheduling

Pradeep Kumar
Updated on 12-Jul-2023 12:01:23

367 Views

Disk scheduling is a crucial component of operating systems that manages the order in which disk requests are serviced. When analyzing disk performance, two important metrics to consider are Transfer Time and Disk Access Time. Understanding the difference between these metrics can provide insights into the efficiency and responsiveness of disk scheduling algorithms. What is Transfer Time in Disk Scheduling? Transfer time, also known as data transfer time, is the time required to move a block of data between the disk and the main memory. It is primarily determined by the speed at which the disk can transfer data. The ... Read More

Difference between Swapping and Context Switching

Pradeep Kumar
Updated on 12-Jul-2023 11:53:04

232 Views

In computer systems, there are various techniques and mechanisms employed to manage and optimize the execution of processes and tasks. Two such techniques are swapping and context switching. Although they both play a role in improving system performance and multitasking capabilities, they serve different purposes and operate at different levels within the system. Let's delve into the difference between swapping and context switching. What is Swapping? Swapping is a technique used in operating systems to manage memory resources efficiently. It involves moving an entire process or a part of it from main memory (RAM) to secondary storage (such as a ... Read More

Difference between System Call and Library Call

Pradeep Kumar
Updated on 12-Jul-2023 11:50:12

346 Views

In computer programming, system calls and library calls are essential mechanisms used to interact with the underlying operating system and perform various operations. While they both involve invoking functions or routines, there are distinct differences between system calls and library calls. Understanding these differences is crucial for developers to efficiently utilize these mechanisms in their applications. This article explores the dissimilarities between system calls and library calls, shedding light on their respective characteristics and functionalities. What is System Call? A system call is a mechanism provided by the operating system that allows user-level programs to request services from the operating ... Read More

Difference between Thread Context Switch and Process Context Switch

Pradeep Kumar
Updated on 12-Jul-2023 11:43:19

760 Views

Context switching is a fundamental operation performed by an operating system to manage multiple threads or processes in a multitasking environment. It involves saving the current execution context of a thread or process and restoring the execution context of another thread or process. This allows the operating system to quickly switch between different threads or processes, giving the illusion of concurrent execution. There are two types of context switches: "thread context switch" and "process context switch". Let's explore the differences between them. What is Thread Context Switch? A thread context switch refers to the process of saving the current ... Read More

Difference between system() and execl() Call

Pradeep Kumar
Updated on 12-Jul-2023 11:40:28

182 Views

In programming, system−level calls are used to interact with the operating system and perform various tasks. Two commonly used system−level calls are system() and execl(). While both these calls allow executing external programs, they differ in their functionality and usage. What is system() Call? The system() call is a higher−level function that allows the execution of shell commands or scripts. When system() is invoked with a command as its argument, it starts a new shell process, which then interprets and executes the specified command. The system() call provides a simple way to interact with the command line and execute external ... Read More

Difference between User-CPU-Time and System-CPU-Time in UNIX

Pradeep Kumar
Updated on 12-Jul-2023 11:32:29

196 Views

In UNIX−based operating systems, such as Linux, there are two types of CPU time that are commonly measured: user CPU time and system CPU time. These metrics provide insights into how the CPU resources are being utilized by different components of a system or process. Understanding the difference between user CPU time and system CPU time is essential for performance analysis and troubleshooting. What is User−CPU−Time in UNIX? User CPU time represents the amount of CPU time spent executing in user mode, which is the mode where application code runs. It includes the time spent executing the user's program ... Read More

Difference between Virtualization and Hypervisor

Pradeep Kumar
Updated on 12-Jul-2023 11:00:14

805 Views

Virtualization and hypervisor are closely related concepts in the field of computer science, specifically in the domain of system virtualization. While they are interconnected, they represent different aspects of the virtualization technology. What is Virtualization? Virtualization is a technique that allows the creation and operation of multiple virtual environments or virtual machines (VMs) on a single physical computer or server. It enables the sharing of hardware resources, such as processing power, memory, and storage, among multiple operating systems or applications. Each virtual machine functions as an independent and isolated entity, running its own operating system and applications. There are 4 ... Read More

Time Based Access-List

Satish Kumar
Updated on 12-Jul-2023 10:06:13

278 Views

Introduction A time−based access list is a feature in network security tools that enables network administrators to control the traffic through a network based on the time of day, week or month. This type of access list allows administrators to increase security by only permitting specific users or devices to access the network during certain times, while blocking others. Definition of Time−Based Access-List A Time-Based Access−List (ACL) is a set of rules used to filter traffic passing through a router or switch based on date and time parameters. It is an extended version of an Access Control List ... Read More

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