Uniprocessor Scheduling

Introduction:

Uniprocessor Scheduling gives you more focusing for processes in operating system, so you have to understand all tasks of processes.

In a multiprogramming system, multiple processes exist concurrently in main memory. Each process alternates between using a processor and waiting for some event to occur, such as the completion of an I/O operation. The processor or processors are kept busy by executing one process while the others wait.

Security

Introduction :

This topic is talking about security of operating system and classification of three key objectives with more details about kinds of malware and viruses.

Three key objectives are at the heart of computer security :

•        Confidentiality
•        Integrity
•        Availability

Interrupts

Introduction:

Interrupt can stop job and start another more important job, and every part of information below support you to understand how interrupts work.

What is an interrupt?

Definition : an event external to the currently executing process that causes a change in the normal flow of instruction execution. Usually generated by hardware devices external to the CPU.