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Operating System Concepts Chapter 4: Threads

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Operating System Concepts Chapter 4: Threads

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Questions and Answers

What is the primary difference between user threads and kernel threads?

User threads are used for I/O-bound operations, while kernel threads are used for CPU-bound operations.

User threads are managed by a user-level threads library, while kernel threads are supported by the kernel. (correct)

User threads are supported by the kernel, while kernel threads are managed by a user-level threads library.

User threads are used for parallel processing, while kernel threads are used for sequential processing.

What is the primary advantage of the Many-to-Many multithreading model?

It allows for more concurrency than the One-to-One model.

It allows many user-level threads to be mapped to a single kernel thread.

It allows the operating system to create a sufficient number of kernel threads. (correct)

It is more efficient in terms of memory usage.

What is the primary characteristic of the One-to-One multithreading model?

Each user-level thread maps to multiple kernel threads.

Multiple user-level threads map to a single kernel thread.

Kernel threads are not supported in this model.

Each user-level thread maps to a single kernel thread. (correct)

What is the primary purpose of a thread library?

To provide a programmer with an API for creating and managing threads. Signup and view all the answers

What is the primary difference between Pthreads and Java threads?

Pthreads are a POSIX standard, while Java threads are a Java standard. Signup and view all the answers

What is the primary advantage of implicit threading?

It allows the compiler and run-time libraries to manage threads, making it easier to write correct programs. Signup and view all the answers

What is the primary purpose of thread pools?

To create a pool of threads that await work. Signup and view all the answers

What is the primary advantage of OpenMP?

It provides support for parallel programming in shared-memory environments. Signup and view all the answers

Which operating system uses the Many-to-One multithreading model?

Solaris. Signup and view all the answers

What is the primary difference between a thread library and a kernel-level library?

A thread library is implemented in user space, while a kernel-level library is implemented in kernel space. Signup and view all the answers