Operating Systems Questions

Mutual exclusion

Hold and wait

No preemption

Circular wait

Deadlock is a situation where a group of processes are all blocked and none of them can become unblocked until one of the other becomes unblocked. The simplest deadlock is two processes each of which is waiting for a message from the other.

Absolute path-- Exact path from root directory.

Relative path-- Relative to the current path.

Hard real-time systems required to complete a critical task within a guaranteed amount of time.
Soft real-time computing requires that critical processes receive priority over less fortunate ones.

• Responsiveness


• Resources sharing


• Economy


• Utilization of multiprocessor architectures.

System calls provide the interface between a process and the operating system. System calls for modern Microsoft windows platforms are part of the win32 API, which is available for all the compilers written for Microsoft windows.

SCSI - Small computer systems interface is a type of interface used for computer components such as hard drives, optical drives, scanners and tape drives. It is a competing technology to standard IDE (Integrated Drive Electronics).

User thread

Kernel thread