1
GATE CSE 2008
MCQ (Single Correct Answer)
+2
-0.6
Which of the following is/are true of the auto-increment addressing mode?
$${\rm I}.\,\,\,$$ It is useful in creating self-relocating code
$${\rm II}.\,\,\,$$ If it is included in an Instruction Set Architecture, then an additional $$ALU$$ is required for effective address calculation.
$${\rm III}.\,\,\,$$ The amount of increment depends on the size of the data item accessed
A
$${\rm I}$$ only
B
$${\rm II}$$ only
C
$${\rm III}$$ only
D
$${\rm II}$$ & $${\rm III}$$ only
2
GATE CSE 2008
MCQ (Single Correct Answer)
+2
-0.6
A process executes the following code
for (i = 0; i < n; i + +) fork ( ); 
The total number of child processes created is
A
$$n$$
B
$${2^n} - 1$$
C
$${2^n}$$
D
$${2^{n + 1}} - 1$$
3
GATE CSE 2007
MCQ (Single Correct Answer)
+2
-0.6
An operating system uses Shortest Remaining Time first $$(SRT)$$ process scheduling algorithm. Consider the arrival times and execution times for the following processes: GATE CSE 2007 Operating Systems - Process Concepts and Cpu Scheduling Question 28 English

What is the total waiting time for process $$P2?$$

A
$$5$$
B
$$15$$
C
$$40$$
D
$$55$$
4
GATE CSE 2006
MCQ (Single Correct Answer)
+2
-0.6
Consider three processes, all arriving at time zero, with total execution time of $$10,20,$$ and $$30$$ units, respectively. Each process spends the first $$20$$% of execution time doing $${\rm I}/O$$, the next $$70$$% of time doing computation, and the last $$10$$% of time doing $${\rm I}/O$$ again. The operating system uses a shortest remaining compute time first scheduling algorithm and scheduling a new process either when the running processes gets blocked on $${\rm I}/O$$ or when the running process finishes its compute burst. Assume that all $${\rm I}/O$$ operations can be overlapped as much as possible. For what percentage of time does the $$CPU$$ remain idle?
A
$$0$$%
B
$$10.6$$%
C
$$30.0$$%
D
$$89.4$$%
GATE CSE Subjects
Software Engineering
Web Technologies
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