DATABASE: WHAT IS DATABASE: WHAT IS RDBMS • Relational data base management system • Used to manage the database • Introduced by codd . What is table ...
Home (PCB) or Task Control Block (TCB) • As the operating system supports multi-programmin g , it needs to keep track of all the processes • T he process control block (PCB) is used to track the proces s ’s execution status. • Each block of memory contains information about the process state, program counter, stack pointe r , status of opened files, scheduling algorithms, etc. • All these information is required and must be saved when the process is switched from one state to...
Think Global...... Act Local....... Basic of Operating System system software & utility software Device Management & Device Drivers Buffering, Polling & Spooling Types of Operating Systems Loosely and tightly coupled systems What does Kernel mean? Multitasking,Multi programming & Multiprocessing Scheduling algorithms
Home Buffering Kernels provide many services related to I/O. Several services—scheduling, buffering, caching, spooling, device reservation, and error handling—are provided by the kernel’s I/O subsystem and build on the hardware and device-driver infrastructure. A buffer, of course, is a memory area that stores data being transferred between two devices or between a device and an application. Caching: A cache is a region of fast memory that holds copies of data or cache is a temporary storage area where frequently accessed data can be stored for rapid access. What does Buffer mean? A buffer is a temporary holding area for data while it's waiting to be transferred to another location. It is usually located in the RAM. The concept of the buffer has developed in order to prevent data congestion from an incoming to an outgoing port of transfer. Computers have many different devices that all operate at varying speeds, and a buffer is needed to act as a ...
Thank you sir
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