
OS quiz 9/9/2025
Authored by Bhargavi Cherlopalli
Other
Professional Development

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6 questions
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1.
MULTIPLE CHOICE QUESTION
10 mins • 5 pts
FCFS Scheduling Algorithm:
Processes -
P1(AT=0, BT=5),
P2(AT=0, BT=9),
P3(AT=0,BT= 6)
CT: P1=5, P2=14, P3=20
TAT : P1=5, P2=14, P3=20
ATAT: 13.00
WT: P1=0, P2=5, P3=14
AWT: 6.33
CT: P1=6, P2=11, P3=20
TAT : P1=3, P2=14, P3=19
ATAT: 12.00
WT: P1=0, P2=4, P3=11
AWT: 5.33
CT: P1=5, P2=12, P3=17
TAT : P1=6, P2=13, P3=18
ATAT: 11.00
WT: P1=0, P2=14, P3=13
AWT: 6.24
CT: P1=4, P2=15, P3=15
TAT : P1=3, P2=13, P3=17
ATAT: 10.00
WT: P1=0, P2=3, P3=11
AWT: 6.23
2.
MULTIPLE CHOICE QUESTION
10 mins • 5 pts
SJF (non-preemptive) :
Processes:
P1(AT=0,BT=7),
P2(AT=0,BT=2),
P3(AT=0,BT=5)
CT: P2=1, P3=5, P1=12
TAT: P2=3, P3=8, P1=11
ATAT: 7.07
WT: P2=3, P3=5, P1=7
AWT: 3.10
CT: P2=2, P3=7, P1=14
TAT: P2=2, P3=7, P1=14
ATAT: 7.67
WT: P2=0, P3=2, P1=7
AWT: 3.00
CT: P2=2, P3=8, P1=11
TAT: P2=3, P3=3, P1=13
ATAT: 7.52
WT: P2=0, P3=5, P1=7
AWT: 3.25
CT: P2=2, P3=7, P1=14
TAT: P2=2, P3=8, P1=15
ATAT: 7.61
WT: P2=1, P3=5, P1=7
AWT: 3.20
3.
MULTIPLE CHOICE QUESTION
10 mins • 5 pts
SJF (preemptive / SRTF) :
Processes:
P1(0,3),
P2(1,5),
P3(2,2),
P4(3,6)
CT: P1=1, P3=5, P2=12, P4=10
TAT: P1=3, P2=4, P3=5, P4=13
ATAT: 7.17
WT: P1=2, P2=5, P3=1, P4=7
AWT: 3.27
CT: P1=1, P3=5, P2=16, P4=14
TAT: P1=3, P2=8, P3=5, P4=15
ATAT: 7.15
WT: P1=2, P2=5, P3=1, P4=8
AWT: 3.15
CT: P1=2, P3=5, P2=11, P4=15
TAT: P1=2, P2=8, P3=4, P4=13
ATAT: 7.12
WT: P1=2, P2=5, P3=1, P4=7
AWT: 3.42
CT: P1=3, P3=5, P2=10, P4=16
TAT: P1=3, P2=9, P3=3, P4=13
ATAT: 7.00
WT: P1=0, P2=4, P3=1, P4=7
AWT: 3.00
4.
MULTIPLE CHOICE QUESTION
10 mins • 5 pts
Priority (non-preemptive) :
Processes:
P1(0,4) priority=2,
P2(1,3) priority=1,
P3(2,1) priority=4,
P4(3,2) priority=3
CT: P1=3, P2=7, P4=8, P3=11
TAT: P1=2, P2=3, P3=5, P4=8
ATAT: 6.28
WT: P1=0, P2=3, P3=7, P4=5
AWT: 4.55
CT: P1=3, P2=7, P4=8, P3=14
TAT: P1=3, P2=4, P3=8, P4=5
ATAT: 6.12
WT: P1=0, P2=2, P3=8, P4=5
AWT: 3.55
CT: P1=4, P2=7, P4=9, P3=10
TAT: P1=4, P2=6, P3=8, P4=6
ATAT: 6.00
WT: P1=0, P2=3, P3=7, P4=4
AWT: 3.50
CT: P1=2, P2=5, P4=8, P3=11
TAT: P1=2, P2=3, P3=5, P4=8
ATAT: 6.20
WT: P1=0, P2=3, P3=7, P4=5
AWT: 4.15
5.
MULTIPLE CHOICE QUESTION
10 mins • 5 pts
Priority (preemptive) :
Processes:
P1(0,4) priority=3,
P2(1,3) priority=1,
P3(2,5) priority=2
CT: P2=2, P1=5, P3=8
TAT: P1=4, P2=7, P3=14
ATAT: 6.45
WT: P1=3, P2=0, P3=5
AWT: 2.15
CT: P2=4, P1=5, P3=11
TAT: P1=5, P2=8, P3=15
ATAT: 6.23
WT: P1=2, P2=0, P3=7
AWT: 2.45
CT: P2=4, P1=12, P3=9
TAT: P1=12, P2=3, P3=7
ATAT: 7.33
WT: P1=8, P2=0, P3=2
AWT: 3.33
CT: P2=4, P1=5, P3=11
TAT: P1=4, P2=5, P3=13
ATAT: 7.23
WT: P1=3, P2=0, P3=5
AWT: 3.13
6.
MULTIPLE CHOICE QUESTION
10 mins • 5 pts
Round Robin (quantum = 2):
Processes:
P1(0,7),
P2(2,4),
P3(4,1)
CT: P1=9, P2=12, P3=5
TAT: P1=11, P2=15, P3=1
ATAT: 10.27
WT: P1=9, P2=7, P3=5
AWT: 6.67
CT: P1=12, P2=11, P3=7
TAT: P1=12, P2=9, P3=3
ATAT: 8
WT: P1=5, P2=5, P3=2
AWT: 4
CT: P1=11, P2=15, P3=8
TAT: P1=15, P2=13, P3=2
ATAT: 11.67
WT: P1=10, P2=8, P3=6
AWT: 5.67
CT: P1=11, P2=14, P3=9
TAT: P1=13, P2=16, P3=1
ATAT: 11.07
WT: P1=11, P2=8, P3=5
AWT: 4.65
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