Midterm - Quiz 2
12 Questions
| Attempts: 52
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For thread scynchronization outside the kernel, Windows provides ________ . Using it, threads synchronize according to several different mechanisms, including mutex locks, semaphores, events, and timers. The system protects shared data by requiring a thread to gain ownership of a mutex to access the data and to release ownership when it is finished.
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- 2.
A spinlock is a type of mutex lock because the process loops while waiting for the lock to become available.
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True
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False
Correct Answer
A. True -
- 3.
What is the term for describing the situation where shared data may be manipulated concurrently and the outcome of the execution depends upon the order of access? ________
Correct Answer
RACE CONDITION - 4.
How many writers may concurrently open the database with the readers-writers problem? ________ (answer in numeric form)
Correct Answer
1 - 5.
There are no guarantees Peterson's solution works correctly on modern computer architectures.
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True
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False
Correct Answer
A. True -
- 6.
A counting semaphore is functionally equivalent to a mutex lock because it provides a 0 or a 1 value to indicate mutual exclusion.
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True
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False
Correct Answer
A. False -
- 7.
A nonpreemptive kernel is essentially free from race conditions.
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True
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False
Correct Answer
A. True -
- 8.
What is the term used to describe the segment of code where shared data is accessed and possibly manipulated? ________
Correct Answer
CRITICAL SECTION - 9.
Linux uses spinlocks for both single and multiple processor systems.
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True
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False
Correct Answer
A. False -
- 10.
The only operations that can be invoked on a condition variable are ________ and ________. (answer in correct order of operation)
Correct Answer
WAIT()
SIGNAL() - 11.
Many modern computer systems therefore provide special hardware instructions that provides the solution to synchronization problem. The ________ operates on a single variable while the ________ on three variables.
Correct Answer
TEST AND SET()
COMPARE AND SWAP() - 12.
What are the two functions used when mutex locks? ________ and ________ (answer in according to the order of execution.)
Correct Answer
ACQUIRE
RELEASE
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Current Version
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Mar 14, 2022Quiz Edited by
ProProfs Editorial Team -
Aug 21, 2019Quiz Created by
Carlo B.
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