OPERATING SYSTEM OBEJECTIVE2

OPERATING SYSTEM CONCEPT


Job Control Language (JCL) are used to Specify, to the operating system, the beginning and end of a job in a batch.

Boundary registers   track the beginning and ending of programs

Round-robin scheduling gives each task the same chance at the processor

Four necessary conditions for deadlock to exist are: mutual exclusion, no-preemption, circular wait and hold and wait

Page-map table is used for address translation

Dispatcher assigning ready process to the CPU

The table created by lexical analysis to describe all literals used in the source program, is Literal table

The term 'polling' in a computer means a process by which a computer system  inquires to see if a terminal has any transaction to send

File record length should be chosen to match the data characteristics

Terminal Table a permanent table which lists all key words and special symbols of the language in symbolic form

Round-robin  is a pre-emptive scheduling algorithm.

Paging  is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.

Scheduling is allowing jobs to use the processor.

Semaphores  synchronize critical resources to prevent deadlock