1. CSEN5322
Quiz-5

2. 1. An instruction that executes atomically ____.
Multiple Choices
1. An instruction that executes atomically ____.
A) must consist of only one machine instruction
B) executes as a single, uninterruptible unit
C) cannot be used to solve the critical section problem
D) All of the above
2. _____ can be used to prevent busy waiting when implementing a semaphore.
A) Spinlocks C) Mutex lock
B) Waiting queues D) Allowing the wait() operation to succeed
3. Windows XP, when accessing a global variable on a uniprocessor system, ____.
A) masks interrupts for all interrupt handlers that may also access the variable
B) uses spinlocks
C) uses an adaptive mutex scheme
D) uses mutex locks
T/F
4. Mutex locks and binary semaphores are essentially the same thing.
5. If a resource-allocation graph has a cycle, the system must be in a deadlocked state.

3. 1. An instruction that executes atomically ____.
Multiple Choices
1. An instruction that executes atomically ____.
A) must consist of only one machine instruction
B) executes as a single, uninterruptible unit
C) cannot be used to solve the critical section problem
D) All of the above
2. _____ can be used to prevent busy waiting when implementing a semaphore.
A) Spinlocks C) Mutex lock
B) Waiting queues D) Allowing the wait() operation to succeed
3. Windows XP, when accessing a global variable on a uniprocessor system, ____.
A) masks interrupts for all interrupt handlers that may also access the variable
B) uses spinlocks
C) uses an adaptive mutex scheme
D) uses mutex locks
T/F
4. Mutex locks and binary semaphores are essentially the same thing. T
5. If a resource-allocation graph has a cycle, the system must be in a deadlocked state F