Which one of the following is FALSE?
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GATE CSE 2014 Set 1 · Q20
MCQ1 markEasy
Time
Which one of the following is FALSE?
Select one answerSingle correct
Pick an option to check
Solution
Step-by-step verified solution
Official answer: D) Kernel level threads cannot share the code segment.
Processes, Threads and IPCLet us evaluate each statement:
(A) User level threads are not scheduled by the kernel: This is TRUE. User-level threads are managed and scheduled entirely by user-space thread libraries without kernel awareness.
(B) When a user level thread is blocked, all other threads of its process are blocked: This is TRUE. Because the kernel sees the entire process as a single thread of execution, a blocking system call by one user-level thread blocks the whole process.
(C) Context switching between user level threads is faster than context switching between kernel level threads: This is TRUE. Switching user-level threads does not require a mode switch from user mode to kernel mode.
(D) Kernel level threads cannot share the code segment: This is FALSE. Threads belonging to the same process (whether user-level or kernel-level) share the same address space, which includes the code (text), data, and heap segments.
Therefore, the statement in option (D) is false.
Try the question first, then check your work.
Examiner trap
The misconception this question tests
Recall which resources (such as code, data, open files) are shared among all threads of the same process.
This Processes, Threads and IPC previous year question is Q20 of the GATE CSE 2014 Set 1 paper. Find more GATE CSE PYQs on Processes, Threads and IPC in Operating Systems, or browse all GATE CSE PYQs.
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Processes, Threads and IPC in GATE CSE
Processes, Threads and IPC has 15 GATE CSE PYQs across 13 papers from 2011 to 2026. 7 of them are 1-mark MCQs like this one, and it is the only one in GATE CSE 2014 Set 1.
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Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.