What is mutex?

Correct Answer: 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

Correct Answer: User thread Kernel thread

Correct Answer: Java is one of the small number of languages that support at the language level for the creation and management of threads However, because threads are managed by the java virtual machine (JVM), not by a user-level library or kernel, it is difficult to classify Java threads as either user- or kernel-level

Correct Answer: Job queue Ready queue Device queue

Correct Answer: 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

Correct Answer: The process of packaging and sending interface method parameters across thread or process boundaries

Correct Answer: In order to protect the operating systems and the system programs from the malfunctioning programs the two mode operations were evolved System mode User mode

Correct Answer: 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

Correct Answer: Absolute path-- Exact path from root directory Relative path-- Relative to the current path

Correct Answer: Fragmentation occurs in a dynamic memory allocation system when many of the free blocks are too small to satisfy any request