What is a Real-Time System?

Correct Answer: Throughput : number of processes that complete their execution per time unit Turnaround time : amount of time to execute a particular process Waiting time : amount of time a process has been waiting in the ready queue Response time : amount of time it takes from when a request was submitted until the firstresponse is produced, not output (for time-sharing environment)

Correct Answer: In batched operating system the users gives their jobs to the operator who sorts the programs according to their requirements and executes them This is time consuming but makes the CPU busy all the time

Correct Answer: Paging is solution to external fragmentation problem which is to permit the logical address space of a process to be noncontiguous, thus allowing a process to be allocating physical memory wherever the latter is available

Correct Answer: It is a fault tolerance disk driver for Windows NT

Correct Answer: The special thread a dispatcher will execute when no ready thread is found

Correct Answer: 1The hardware 2The operating system 3The application programs 4The users

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: Job queue Ready queue Device queue

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: User thread Kernel thread