Operating Systems Quiz

What is an operating system?

• interface between the hardware and application programs

• collection of programs that manages hardware resources

• system service provider to the application programs

• all of the mentioned

External fragmentation exists when?

• enough total memory exists to satisfy a request but it is not contiguous

• the total memory is insufficient to satisfy a request

• a request cannot be satisfied even when the total memory is free

• none of the mentioned

Which one of the following is not true?

• kernel remains in the memory during the entire computer session

• kernel is made of various modules which can not be loaded in running operating system

• kernel is the first part of the operating system to load into memory during booting

• kernel is the program that constitutes the central core of the operating system

In a timeshare operating system, when the time slot assigned to a process is completed, the process switches from the current state to?

• Suspended state

• Terminated state

• Ready state

• Blocked state

The operating system maintains a ______ table that keeps track of how many frames have been allocated, how many are there, and how many are available.

• memory

• mapping

• page

• frame

Whenever a process needs I/O to or from a disk it issues a ______________

• system call to the operating system

• a special procedure

• system call to the CPU

• all of the mentioned

In Unix, which system call creates the new process?

• create

• fork

• new

• none of the mentioned

In real time operating system ____________

• process scheduling can be done only once

• all processes have the same priority

• kernel is not required

• a task must be serviced by its deadline period

Deadlock prevention is a set of methods ____________

• to ensure that at least one of the necessary conditions cannot hold

• to ensure that all of the necessary conditions do not hold

• to decide if the requested resources for a process have to be given or not

• to recover from a deadlock

Where are placed the list of processes that are prepared to be executed and waiting?

• Job queue

• Ready queue

• Execution queue

• Process queue