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Exam CAS-004 topic 1 question 116 discussion

Actual exam question from CompTIA's CAS-004
Question #: 116
Topic #: 1
[All CAS-004 Questions]

An organization that provides a SaaS solution recently experienced an incident involving customer data loss. The system has a level of self-healing that includes monitoring performance and available resources. When the system detects an issue, the self-healing process is supposed to restart parts of the software.
During the incident, when the self-healing system attempted to restart the services, available disk space on the data drive to restart all the services was inadequate. The self-healing system did not detect that some services did not fully restart and declared the system as fully operational.
Which of the following BEST describes the reason why the silent failure occurred?

  • A. The system logs rotated prematurely.
  • B. The disk utilization alarms are higher than what the service restarts require.
  • C. The number of nodes in the self-healing cluster was healthy.
  • D. Conditional checks prior to the service restart succeeded.
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
by dangerelchulo at Sept. 11, 2022, 2:29 p.m.

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dangerelchulo
Highly Voted 2 years, 7 months ago
Selected Answer: D
you don't base a restart on disk utilization you do prechecks. I had to use it for VMware orchestrator javascript. So best answer is D
upvoted 15 times
deeden
5 months, 2 weeks ago
Afree with D. The silent failure occurred because the **conditional checks**, which the self-healing system used to verify the status of the services, incorrectly indicated that all services were operational. These checks likely succeeded because they were not comprehensive enough to detect incomplete restarts or the lack of adequate disk space. - The system assumed that if the restart process was initiated and no immediate errors were detected, the services were fully restored. This oversight highlights a flaw in the design of the conditional checks.
upvoted 3 times
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BreakOff874
Highly Voted 2 years ago
Selected Answer: B
The silent failure occurred because the disk utilization alarms were set at a threshold that was higher than the actual amount of disk space required for service restarts. This means that the self-healing system didn't recognize the lack of available disk space as a problem, and it didn't trigger an alert or take any corrective action. As a result, some services didn't fully restart, leading to customer data loss. The self-healing system should have been configured with disk utilization alarms that accurately reflect the disk space requirements for service restarts to ensure adequate monitoring and prompt response to potential issues.
upvoted 7 times
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Bright07
Most Recent 6 months ago
Ans is D. The best description for why the silent failure occurred is Conditional checks prior to the service restart succeeded. In this scenario, the self-healing system likely performed checks that indicated conditions were met for a successful restart, such as checking if the service could be restarted without considering available disk space or the actual state of all services. This led the system to incorrectly declare itself as fully operational, despite some services not restarting due to inadequate disk space.
upvoted 2 times
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23169fd
9 months, 3 weeks ago
Selected Answer: D
The main reason for the silent failure is that the conditional checks prior to the service restart succeeded, but they did not include comprehensive verification of resource availability or post-restart service status. This led to the self-healing system incorrectly declaring the system as fully operational
upvoted 3 times
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cyspec
10 months ago
Selected Answer: D
None of the other options make sense.
upvoted 2 times
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ThatGuyOverThere
1 year, 6 months ago
Selected Answer: B
It makes sense to me that the disk alarms could supersede the alarms and processes that monitored service status. D isn't a good option in my opinion because, as others have stated, if the conditions were detected as good prior to the restarts, then the restarts should never have been attempted by the system in the first place.
upvoted 3 times
tefyayaydu
1 year, 5 months ago
D is a valid answer. If the conditional checks 'passed', it means there is an issue with the conditional checks, just like it is also possible that the thresholds for disk utilization are also incorrect. An argument could be made for each other, depending on whether the self-healing is affected by 'alarms'. The 'alarm' could be some type of event that the system recognizes or it could just be informational in nature. More context is needed, can't fault anyone for choosing either.
upvoted 2 times
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CoolCat22
1 year, 7 months ago
Selected Answer: B
D states that the Checks prior to the restart not after the restart, so checks= good restart = good after checks= good (but not really) so if the first checks failed it wouldn't have restarted in the first place BBBBBBBBBBBB
upvoted 4 times
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BiteSize
1 year, 9 months ago
Selected Answer: B
Baseline was above alarms. Alarms didn't go off. Pretty straightforward. Source: Verifying each answer against Chat GPT, my experience, other test banks, a written book, and weighing in the discussion from all users to create a 100% accurate guide for myself before I take the exam. (It isn't easy because of the time needed, but it is doing my diligence)
upvoted 5 times
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javier051977
2 years ago
Selected Answer: B
Therefore, the BEST answer is D. Conditional checks prior to the service restart succeeded, meaning that the system did not detect any issues with the services before attempting to restart them. The conditional checks likely did not include checking for available disk space, which would have prevented the attempted restart of the services if the disk space was inadequate.
upvoted 5 times
Uncle_Lucifer
1 year, 8 months ago
Then why did you select B?
upvoted 2 times
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kycugu
2 years, 4 months ago
B. The disk utilization alarms are higher than what the service restarts require. explaining futher.... The self-healing system attempted to restart the services, but the disk space on the data drive was insufficient to do so. This indicates that the disk utilization alarms were higher than what the service restarts required, indicating that the system was unable to detect the issue and the services did not fully restart. This is the reason why the silent failure occurred.
upvoted 7 times
deeden
5 months, 2 weeks ago
While insufficient disk space contributed to the restart failure, the root cause of the silent failure was the inability of the conditional checks to identify this issue, not the alarm thresholds themselves.
upvoted 1 times
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