Netfilter is a framework provided by the Linux kernel that allows various networking-related tasks to be performed within the kernel. These tasks include packet filtering, network address translation, and port forwarding. Netfilter is implemented as a set of kernel hooks that can be invoked by kernel code or by user-space applications. What is difference between … Read more
Thrashing is a condition where the CPU is spending most of its time doing nothing useful because it is constantly swapping data between memory and the disk. Thrashing occurs when the system is trying to run too many programs at the same time or when a program is trying to do too much. What is … Read more
Mac OS X Lion is a Unix-based operating system developed and marketed by Apple Inc. It is the successor to Mac OS X Snow Leopard and is the eighth major release of the Mac OS X line of operating systems. It was released on July 20, 2011 and made available for purchase and download through … Read more
The Darwin operating system is the core of the macOS, iOS, tvOS, and watchOS operating systems from Apple. It is based on the Unix operating system and provides a stable, secure, and powerful platform for developing and running applications. Darwin is open source and available for free. It can be downloaded from the Apple Developer … Read more
The Power-On Self-Test (POST) is a process that happens every time you turn on your computer. The purpose of POST is to check if your computer’s hardware is working properly. If any hardware component is not working properly, POST will display an error message on your screen. POST is divided into two parts: the first … Read more
MULTOS is a multiple operating system designed to provide a high degree of security for smart cards and other devices. It is based on a microkernel architecture, which allows it to be easily ported to different hardware platforms. MULTOS is approved by the major payment schemes for use in their payment cards, and is used … Read more
Google Chrome Enterprise is a software package that includes the Google Chrome web browser and a set of management tools. It is designed for organizations that want to deploy the Chrome browser on a large number of computers. The management tools allow administrators to centrally manage settings and preferences, deploy updates, and track usage. What … Read more
Interprocess communication (IPC) is a mechanism that allows processes to communicate with each other. IPC can be used to allow processes to share data, synchronize with each other, or exchange messages. There are many different types of IPC mechanisms, including pipes, message queues, shared memory, and semaphores. Each type of IPC has its own advantages … Read more
In computer science, a deadlock is a state in which two or more competing actions are each waiting for the other to finish, and thus neither can ever proceed. Deadlock is a common problem in concurrent programming, and can be difficult to debug and diagnose. There are four conditions that must be met for a … Read more
A motif is a recurring image, concept, or structure in a work of art. Motifs can be literal, such as a flower in a painting, or symbolic, such as a lion in a medieval tapestry. A work of art may have multiple motifs, which can be combined or used in different ways throughout the work. … Read more
