GATE CS 2014 Set 1 — Question 30

MCQ+1 / -0.33EasyUser vs Kernel ThreadsProcesses & ThreadsOperating SystemContext Switching

Operating System → Processes & Threads → Context Switching

Last updated 5 September 2026

Question

Which one of the following is FALSE ?

Correct answer (D) Kernel level threads cannot share the code segment. Solution Option (D) is FALSE. Kernel-level threads belonging to the same process share the same code segment, data segment, and open files, just like user-level threads. They only maintain separate stacks and register sets. (A) is True: The kernel is unaware of user-level threads and manages them as a single process. (B) is True: Since the kernel sees the process as a single thread of execution, if one user-level thread makes a blocking system call, the entire process is blocked. (C) is True: User-level thread switching does not require kernel intervention (no mode switch), making it faster. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (D) Kernel level threads cannot share the code segment. Solution Option (D) is FALSE. Kernel-level threads belonging to the same process share the same code segment, data segment, and open files, just like user-level threads. They only maintain separate stacks and register sets. (A) is True: The kernel is unaware of user-level threads and manages them as a single process. (B) is True: Since the kernel sees the process as a single thread of execution, if one user-level thread makes a blocking system call, the entire process is blocked. (C) is True: User-level thread switching does not require kernel intervention (no mode switch), making it faster.

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