Loading previous year questions
Operating Systems · System Calls
Official IIT answer key · IIT Kanpur · Audited Aug 2026
GATE CSE 2023 Q23 · MSQ · 1 mark
Key concept
No account needed
Sit 4 related System CallsPYQs as a guest. We'll score the set and show which traps cost marks — sign in only if you want to save the run.
Topic notes
GATE tests System Calls through two primary angles: conceptual understanding of dual-mode operation (distinguishing user-level library routines and mode switches from true kernel-level traps and process switches) and algorithmic tracing of process control system calls like fork() and wait(). Recent papers feature multi-select questions (MSQs) probing which events or C standard library functions strictly trigger kernel transitions, alongside numerical answer type (NAT) questions involving state-tree tracing over loops of system calls.
Full System Calls guide →Which one or more of the following options guarantee that a computer system will transition from user mode to kernel mode?
Topic-wise GATE CS PYQs with verified steps
Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.