Operating system revision quiz1(semaphores)

Which of the following is not an operating system?

• Linux

• Unix

• windows

• microsoft office

Concurrent access to shared data may result in _

• data consistency

• data insecurity

• data inconsistency

• None

A situation where several processes access and manipulate the same data concurrently and the outcome of the execution depends on the particular order in which access takes place is called ____________

• data consistency

• race condition

• aging

• starvation

Semaphore is a/an _______ to solve the critical section problem.

• hardware for a system

• special program for a system

• integer variable

• none of the mentioned

What is atomic operations permissible on semaphores?

• wait

• stop

• hold

• none

What are the two kinds of semaphores?

• mutex & counting

• binary & counting

• counting & decimal

• decimal & binary

What is a mutex?

• is a binary mutex

• must be accessed from only one process

• can be accessed from multiple processes

• none of the mentioned

A binary semaphore is a semaphore with integer values

The bounded buffer problem is also known as ____________

• Readers – Writers problem

• Dining – Philosophers problem

• Producer – Consumer problem

• none

To ensure difficulties do not arise in the readers – writers problem _______ are given exclusive access to the shared object.

• readers

• writers

• readers and writers

• None