Page 437 - Computer_Science_F5

Computer Science Gantt chart (visual representation of
process execution), and calculate the
turnaround time for each process.
Step 5: Analyse FCFS
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(a) How do processes with shorter
burst times fare in this algorithm?
(b) Observe the waiting time for each
process. Does it seem fair?
Step 6: Experiment with SJF
Click on “Algorithms” and select
“Shortest Job First (SJF).”
Step 7: Run the simulation again
Use the same processes you created
earlier. Observe the execution order,
Gantt chart, and turnaround times.
Step 8: Compare and analyse
(a) How does the turnaround time for
each process differ between FCFS
and SJF?
(b) Which algorithm seems to favor
shorter processes?
(c) Discuss the advantages and
disadvantages of each algorithm
based on the simulation results.
Step 9: Change the burst times
Modify the burst times of some
processes and rerun both simulations.
Does it alter the scheduling outcomes?
Step 10: Explore more algorithms
The website offers other scheduling
algorithms like Round Robin (RR) and
Priority Scheduling. Experiment with
them and see how they impact process
execution and turnaround time.
428
Computer Science Form 5.indd 428
Write a report that document the key
Deliverable:
experimental procedures, including
the screenshots of the setup in each
step and the results. Document them in
your portifolio.
Exercise 7.3:
1. How does CPU scheduling impact
a digital workflow of a computer
user?
2. Research and compare different
CPU scheduling algorithms used
by three operating systems of your
choice. Work with a colleague
to create a table or infographic
summarizing the strengths and
weaknesses of each algorithm.
3. Imagine you are part of a
development team creating a new
operating system for a self-driving
car. Explain how CPU scheduling
algorithms play a critical role in
ensuring real-time response for
critical tasks like braking or sensor
data processing.
Memory management
In addition to CPU scheduling, the OS is
also responsible for allocating memory
space to different processes when
needed. Main memory is the physical
RAM available in a computer. The OS
performs main memory management
through different memory allocation
strategies, including the following:
(a) First-Fit: A memory block is
allocated to the first process that fits
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23/07/2024 12:34