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Recent questions tagged os-protection

40 votes

6 answers

1

GATE IT 2005 | Question: 19, UGCNET-June2012-III: 57
A user level process in Unix traps the signal sent on a Ctrl-C input, and has a signal handling routine that saves appropriate files before terminating the process. When a Ctrl-C input is given to this process, what is the mode in which the signal handling routine executes? User mode Kernel mode Superuser mode Privileged mode

Ishrat Jahan asked in Operating System Nov 3, 2014

by Ishrat Jahan

8.3k views

22 votes

2 answers

2

GATE CSE 1999 | Question: 1.11, UGCNET-Dec2015-II: 44
System calls are usually invoked by using a software interrupt polling an indirect jump a privileged instruction

Kathleen asked in Operating System Sep 23, 2014

10.0k views

61 votes

5 answers

3

GATE CSE 2001 | Question: 1.13
A CPU has two modes -- privileged and non-privileged. In order to change the mode from privileged to non-privileged a hardware interrupt is needed a software interrupt is needed a privileged instruction (which does not generate an interrupt) is needed a non-privileged instruction (which does not generate an interrupt) is needed

Kathleen asked in Operating System Sep 14, 2014

17.5k views

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Recent questions tagged os-protection