22 Questions
What is a key difference between user threads and kernel threads?
User threads are managed by the user-level threads library, while kernel threads are supported by the kernel.
Which multithreading model maps multiple user-level threads to a single kernel thread?
Many-to-One
What is the primary advantage of the One-to-One multithreading model?
It allows for more concurrency than the Many-to-One model.
What is the purpose of a thread library?
To provide an API for creating and managing threads.
Which of the following is an example of a thread library?
Pthreads
What is the primary advantage of implicit threading?
It is easier to implement than explicit threading.
What is the primary limitation of the Many-to-One multithreading model?
One thread blocking causes all to block.
What is the role of the kernel in kernel threads?
The kernel supports kernel threads.
What is the primary benefit of Amdahl's Law?
It predicts the maximum theoretical speedup that can be achieved by parallel processing.
Which of the following is an example of implicit threading?
All of the above
What is the primary advantage of thread creation over process creation?
It is a lighter-weight operation
What is the primary objective of thread cancellation?
To terminate a thread before it has finished
What is a key benefit of using multiple threads in a single process?
Threads share resources of the process
What determines when a thread cancellation occurs?
The thread's state
What is a major challenge in programming multicore systems?
Dividing tasks into threads
What is the term for a system that can perform multiple tasks simultaneously?
Parallelism
What is the purpose of thread-local storage (TLS)?
To allow each thread to have its own copy of data
What is the benefit of multithreading in terms of responsiveness?
Better user interface responsiveness
What is the default type of cancellation in pthreads?
Deferred cancellation
How is thread cancellation handled on Linux systems?
Through signals
What is the primary difference between kernels and user-level threads?
Kernel threads are managed by the kernel
What happens when a thread has cancellation disabled?
Cancellation remains pending until the thread enables it
Learn about Amdahl's Law and the different types of threads in operating systems, including user threads and kernel threads. Understand the role of thread libraries and examples of operating systems that support kernel threads.
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