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+11 votes

System calls are usually invoked by using

  1. a software interrupt
  2. polling

  3. an indirect jump

  4. a privileged instruction

asked in Operating System by Veteran (69k points) | 2.2k views
Ans A

2 Answers

+22 votes
Best answer
Software interrupt is the answer.

Privileged instruction cannot be the answer as system call is done from user mode and privileged instruction cannot be done from user mode.
answered by Veteran (346k points)
selected by
what about polling and indirect jump?
+14 votes
answered by Boss (5k points)

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