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Dell EMC Exam D-ISM-FN-23 Topic 4 Question 16 Discussion

Actual exam question for Dell EMC's Dell Information Storage and Management Foundations 2023 exam
Question #: 16
Topic #: 4
[All Dell Information Storage and Management Foundations 2023 Questions]

An Ethernet switch has eight ports and all ports must be operational for 24hours from Monday through Friday. However, failures of Port 6 occur within the week as follows:

Tuesday = 6AM to 8AM

Thursday = 5PM to 10PM

Friday = 7AM to 9AM

What is the MTBF of Port 6?

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Suggested Answer: B

by Han at Sep 12, 2024, 11:03 PM

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Staci
10 days ago
Hmm, I'm not so sure. The downtime is actually 15 hours, not 14 hours, since the failures overlap on Friday. So the uptime is 105 hours, which means the MTBF is 30 hours. I think the answer is C.
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Fletcher
14 days ago
I think the answer is B. 37 hours. The downtime of Port 6 is 7 hours on Tuesday, 5 hours on Thursday, and 2 hours on Friday, which adds up to 14 hours. Subtracting that from the total 120 hours (24 hours x 5 days) gives us 106 hours of uptime, which means the MTBF is 37 hours.
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Deandrea
2 days ago
I think the answer is B. 37 hours. The downtime of Port 6 is 7 hours on Tuesday, 5 hours on Thursday, and 2 hours on Friday, which adds up to 14 hours. Subtracting that from the total 120 hours (24 hours x 5 days) gives us 106 hours of uptime, which means the MTBF is 37 hours.
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Rocco
22 days ago
This is a classic case of 'when in doubt, choose the longest option.' So I'm going with D) 40 hours. Who needs to actually do the math when you can just guess, am I right?
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Viola
26 days ago
Okay, I got this. The total downtime is 9 hours, and the total time period is 5 days (Monday-Friday). So the MTBF must be 40 hours. Wait, is that right? I need more coffee.
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Cheryll
5 days ago
A) 32 hours
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Laticia
1 months ago
Hmm, let me think this through. Okay, so the total downtime for Port 6 is 9 hours, and the uptime is the rest of the time. That means the MTBF must be 37 hours, right? Easy peasy.
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Serina
3 days ago
That makes sense, the total downtime is 9 hours, so the MTBF is 37 hours.
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Dorethea
21 days ago
Yes, you got it right! The MTBF of Port 6 is indeed 37 hours.
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Lacey
1 months ago
I agree with Lili, the correct answer is 37 hours. The MTBF is calculated by dividing the total operational time by the number of failures.
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Lili
1 months ago
I disagree, I believe it's 37 hours because it failed for a total of 10 hours during the week.
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Kaycee
1 months ago
Wait, so the switch has to be up for 24 hours every weekday, but Port 6 keeps failing? That's like having a car that only works on Tuesdays and Thursdays.
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Madalyn
30 days ago
C) 30 hours
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Pearlene
1 months ago
A) 32 hours
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Shawnda
1 months ago
I think the MTBF of Port 6 is 32 hours.
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