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Software & Coding Articles
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What is the computing environment?
A computing environment refers to the platform or framework where computer programs are developed, deployed, and executed. It encompasses the hardware, software, network infrastructure, and operational procedures that support computing activities. Different computing environments are designed to meet specific requirements for performance, scalability, mobility, and resource sharing. The computing environment determines how resources like CPU, memory, storage, and network are allocated and managed. Modern operating systems support multiple computing environments to accommodate diverse user needs and technological requirements. Types of Computing Environments Traditional Computing Traditional computing involves standalone desktop or server systems where applications run locally ...
Read MoreWhat are advantages and disadvantages of object based distributed OS?
A Distributed Operating System is a type of system where applications run across multiple interconnected computers, functioning as a single unified platform. It extends network operating system capabilities by supporting higher levels of communication and integration between machines. For end-users, it appears as an ordinary centralized operating system while leveraging multiple CPUs and distributed resources. The system can share all resources including CPU, memory, disk storage, network interfaces, and computational nodes across different sites, effectively increasing the data and processing power available to the entire network. All processors connect through high-speed communication media like buses and network lines, with ...
Read MoreDifferentiate between 5 state and 7 state process models.
A process is a program in execution that consists of more than just program code (text section). Process management is fundamental to operating systems as all tasks require processes to execute. The process changes state as it progresses through different phases of execution. The state of a process is defined by its current activity. Only one process can run on a processor at any given instant, while many processes may be ready and waiting for CPU time. Five State Process Model The 5-state model represents the basic lifecycle of a process with the following states − ...
Read MoreWhat is a process control block?
A Process Control Block (PCB) is a data structure in the operating system that contains all the information needed to manage a specific process. Also known as a Task Control Block, the PCB serves as the repository for process-specific data that the OS needs to switch between processes efficiently. Components of a Process Control Block The PCB contains several critical pieces of information associated with each process − Process state − Current state of the process (new, ready, running, waiting, terminated) Program counter − Address of the next instruction to be executed CPU registers − Contents ...
Read MoreWhat is a hierarchical naming system?
A hierarchical naming system is a tree-structured organization where names are organized in levels, with each level representing a more specific subdivision of the previous level. In this system, objects are identified using path names that traverse from a root node down through intermediate nodes to reach the target object. The namespace can be organized as either a directed acyclic graph (DAG) or a tree structure. In a tree structure, each node has exactly one incoming edge (one parent), while in a DAG, nodes can have multiple incoming edges (multiple parents). How It Works A hierarchical naming ...
Read MoreWhat are the Process Management System Calls?
System calls provide an interface between user programs and the operating system. When a user program needs to request services from the kernel, it uses system calls as a programmatic way to access OS functionality. System Call Interface User Program System Call System Call Interface Kernel Mode Operating System Kernel ...
Read MoreHow is IPC implemented in the Android, MAC, Windows Operating systems?
Inter-process communication (IPC) is a technique of exchanging data between two or more processes for performing some action on that data. These processes may be present on the same computer or at remote locations. The reasons for Inter-process communication are as follows − Sharing information between processes Speed up computation through parallel processing Increasing modularity in application design Resource sharing and coordination between processes Now, let us learn about the IPC mechanisms implemented in different operating systems. Android IPC Mechanisms Android OS uses several methods for sharing data between processes, with Binders being ...
Read MoreHow to implement thread in kernel space?
Kernel-level threads are threads that are created and managed directly by the operating system kernel. Unlike user-level threads, which are managed by thread libraries in user space, kernel threads are scheduled by the kernel's thread scheduler and have direct access to system resources. Functions of Kernel The kernel performs several critical functions in the operating system − Memory management − Allocating and deallocating memory for processes and threads Process and thread scheduling − Determining which processes/threads get CPU time File system management − Managing file operations and storage Interrupt handling − Processing hardware and software interrupts ...
Read MoreWhat are thread libraries?
A thread is a lightweight subprocess and the basic unit of CPU utilization, consisting of a program counter, a stack, and a set of registers. Threads enable concurrent execution within a single process, allowing multiple sequences of instructions to run simultaneously. Given below is the structure of threads within a process − Thread Structure in Process Process Shared: Code, Data, Files Thread 1 Registers Stack Program Counter ...
Read MoreWhat are the merits and demerits of a distributed system?
A Distributed Operating System is a type of operating system that manages multiple computers connected through a network as a single coherent system. Unlike traditional centralized systems, distributed OS coordinates resources across multiple machines while presenting a unified interface to users. It extends beyond network operating systems by providing higher levels of integration and transparency. In a distributed system, multiple CPUs work together but appear as a single system to end users. Resources like CPU cycles, memory, storage, and network interfaces can be shared seamlessly across different sites. All processors communicate through high-speed networks such as LANs or WANs, ...
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