Breaking News
You are here: Home / Notes / SEM-5 / Operating System-2

Category Archives: Operating System-2

Feed Subscription

this is a subcategory of sem-5

The Evaluation of Operating System

The Evaluation of Operating System

The Evaluation of Operating System:-   Serial Processing:- With the earliest computers, from the late 1940’s to the mid. 1950’s, the programmer interacted directly with the computer hardware; there was no operating system. These machines were run from a console consisting of display lights, toggle switches, some form of input device, and a printer. Programs in machine code were loaded ... Read More »

Elements of an Operating System

Elements of an Operating System

Elements of an Operating System:-   System Call:- User programs communicate with the o.s. and request services from o.s. by making system calls corresponding to each system call is a library procedure that user programs can call. This procedure puts the parameters of the system call in a specified place, such as the machine registers and then issues a TRAP ... Read More »

Process Management

Process Management

What is a Process?   A process is a sequential program in execution. The components of a process are the following: The object program to be executed ( called the program text in UNIX) The data on which the program will execute (obtained from a file or interactively from the process’s user) Resources required by the program ( for example, files containing requisite information) The status of ... Read More »

Memory Management

swepping

Swapping:   A process needs to be in memory to be executed. A process, however, can be swapped temporarily out of memory to a backing store and then brought back into memory for continued execution.   Ideally, the memory manager can swap processes fast enough that there are always processes in memory ready to execute when the CPU scheduler wants ... Read More »

File Management

file system software architecture

Field:- A field is the basic element of data. It is characterized by its length and data type. The content of a field is provided by a user or a program. Depending on the file design, fields may be of fixed or variable length, case, the field often consists of two or three subfields: the actual vale to be stored, the name ... Read More »

Distributed Systems

process controll block

Distributed Systems:   In this type of system, each processor has its own local memory. The processors communicate with one another through various communication lines, such as high-speed buses or telephone lines. These systems are usually referred toas loosely coupled systems, or distributed systems.   The processors in a distributed system may vary in size and function. They may include small ... Read More »

Short Questions Ansawers

Short Questions Ansawers

1. Differentiate between Process and Thread. Ans. A process is defined as program in execution. A process needs certain resources including CPU time, memory, files and I/O devices to accomplish a task. A thread is called a light weight process and is a basic unit of CPU utilization. One process may have multiple threads.   2. List Memory management functions. Ans. It keeps track of memory ... Read More »

Scroll To Top