Multiple choice

Which of the following statements are true?

  1. A thread has less context compared to a process.
  2. Context switching time would be more in kernel-level threads as compared to the user level threads.
  3. User level threads need a hardware support.
  4. OS can recognise the kernel-level threads definitely.

  1. All of these

  2. Only 1, 2 and 4

  3. Only 1, 3 and 4

  4. Only 2, 3 and 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement 1 is true: threads share address space so have less context. Statement 2 is true: kernel-level threads require mode switches making context switching slower. Statement 3 is false: user-level threads run entirely in user space without hardware support. Statement 4 is true: the OS scheduler directly manages kernel-level threads.

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