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User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?
(a)
(i) The Many - to - one model maps many user threads to one kernel thread
(ii) The one - to - one model maps one user thread to one kernel thread
(iii) The many - to - many model maps many user threads to smaller or equal kernel threads
(b)
(i) Many - to - one model maps many kernel threads to one user thread
(ii) One - to - one model maps one kernel thread to one user thread
(iii) Many - to - many model maps many kernel threads to smaller or equal user threads
- a)(a) is true; (b) is false
- b)(a) is false; (b) is true
- c)Both (a) and (b) are true
- d)Both (a) and (b) are false
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
User level threads are threads that are visible to the programmer and ...
(a) (i) The Many - to - one model maps many user threads to one kernel thread (ii) The one - to - one model maps one user thread to one kernel thread (iii) The many - to - many model maps many user threads to smaller or equal kernel threads
(b) (i) Many - to - one model maps many kernel threads to one user thread (ii) One - to - one model maps one kernel thread to one user thread (iii) Many - to - many model maps many kernel threads to smaller or equal user threads All satement are correct. So, option (A) is correct.
Most Upvoted Answer
User level threads are threads that are visible to the programmer and ...
(a) (i) The Many - to - one model maps many user threads to one kernel thread (ii) The one - to - one model maps one user thread to one kernel thread (iii) The many - to - many model maps many user threads to smaller or equal kernel threads
(b) (i) Many - to - one model maps many kernel threads to one user thread (ii) One - to - one model maps one kernel thread to one user thread (iii) Many - to - many model maps many kernel threads to smaller or equal user threads All satement are correct. So, option (A) is correct.
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Community Answer
User level threads are threads that are visible to the programmer and ...
Explanation:
User-level threads and kernel-level threads are two different types of threads used in operating systems. The operating system kernel supports and manages kernel-level threads, while user-level threads are managed by the programmer.
User-Level Threads:
- User-level threads are threads that are visible to the programmer and are unknown to the kernel.
- These threads are created and managed by the application or programming language without any intervention from the operating system.
- User-level threads are lightweight and have low overhead since they do not require kernel involvement for thread management.
- However, user-level threads are limited by the fact that if one thread blocks or performs a system call, all other threads in the process are also blocked.
Kernel-Level Threads:
- Kernel-level threads are threads that are managed and supported by the operating system kernel.
- The kernel provides system calls and services for creating, scheduling, and managing kernel-level threads.
- Kernel-level threads have the advantage of being able to run in parallel on multiple processors or cores.
- However, they have higher overhead compared to user-level threads due to the involvement of the kernel in thread management.
Models of User and Kernel Level Threads:
There are three different models that relate user-level threads to kernel-level threads:
1. Many-to-One Model:
- In this model, many user threads are mapped to a single kernel thread.
- All user-level threads of a process share the same kernel-level thread.
- This model has low overhead and is easy to implement but lacks the ability to run threads in parallel on multiple processors or cores.
2. One-to-One Model:
- In this model, each user thread is mapped to a separate kernel thread.
- Each user-level thread has a corresponding kernel-level thread.
- This model allows threads to run in parallel on multiple processors or cores, but it has higher overhead compared to the many-to-one model.
3. Many-to-Many Model:
- In this model, many user threads are mapped to smaller or equal kernel threads.
- The mapping between user and kernel threads can be dynamic and change over time.
- This model provides a balance between the flexibility of the one-to-one model and the efficiency of the many-to-one model.
Correct Answer:
The correct answer is option (a) - (a) is true; (b) is false.
- The many-to-one model maps many user threads to one kernel thread.
- The one-to-one model maps one user thread to one kernel thread.
- The many-to-many model maps many user threads to smaller or equal kernel threads.
User-level threads and kernel-level threads are two different types of threads used in operating systems. The operating system kernel supports and manages kernel-level threads, while user-level threads are managed by the programmer.
User-Level Threads:
- User-level threads are threads that are visible to the programmer and are unknown to the kernel.
- These threads are created and managed by the application or programming language without any intervention from the operating system.
- User-level threads are lightweight and have low overhead since they do not require kernel involvement for thread management.
- However, user-level threads are limited by the fact that if one thread blocks or performs a system call, all other threads in the process are also blocked.
Kernel-Level Threads:
- Kernel-level threads are threads that are managed and supported by the operating system kernel.
- The kernel provides system calls and services for creating, scheduling, and managing kernel-level threads.
- Kernel-level threads have the advantage of being able to run in parallel on multiple processors or cores.
- However, they have higher overhead compared to user-level threads due to the involvement of the kernel in thread management.
Models of User and Kernel Level Threads:
There are three different models that relate user-level threads to kernel-level threads:
1. Many-to-One Model:
- In this model, many user threads are mapped to a single kernel thread.
- All user-level threads of a process share the same kernel-level thread.
- This model has low overhead and is easy to implement but lacks the ability to run threads in parallel on multiple processors or cores.
2. One-to-One Model:
- In this model, each user thread is mapped to a separate kernel thread.
- Each user-level thread has a corresponding kernel-level thread.
- This model allows threads to run in parallel on multiple processors or cores, but it has higher overhead compared to the many-to-one model.
3. Many-to-Many Model:
- In this model, many user threads are mapped to smaller or equal kernel threads.
- The mapping between user and kernel threads can be dynamic and change over time.
- This model provides a balance between the flexibility of the one-to-one model and the efficiency of the many-to-one model.
Correct Answer:
The correct answer is option (a) - (a) is true; (b) is false.
- The many-to-one model maps many user threads to one kernel thread.
- The one-to-one model maps one user thread to one kernel thread.
- The many-to-many model maps many user threads to smaller or equal kernel threads.
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User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer?
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User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer?.
User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer?.
Solutions for User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE).
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Here you can find the meaning of User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ?(a)(i) The Many - to - one model maps many user threads to one kernel thread(ii) The one - to - one model maps one user thread to one kernel thread(iii) The many - to - many model maps many user threads to smaller or equal kernel threads(b)(i) Many - to - one model maps many kernel threads to one user thread(ii) One - to - one model maps one kernel thread to one user thread(iii) Many - to - many model maps many kernel threads to smaller or equal user threadsa)(a) is true; (b) is falseb)(a) is false; (b) is truec)Both (a) and (b) are trued)Both (a) and (b) are falseCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Computer Science Engineering (CSE) tests.
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