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

Actual exam question for Dell EMC's D-ISM-FN-23 exam
Question #: 16
Topic #: 4
[All D-ISM-FN-23 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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Annamae
9 months ago
Wait, I've got a better joke for this one. What do you call a switch with a broken port? A Switch-and-a-half! Anyway, I think the answer is B. 37 hours seems about right to me.
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Billye
8 months ago
Well, I guess we'll have to calculate it to be sure. Let's see if it's 37 hours.
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Nan
8 months ago
I see where you're coming from, but I still think it's B) 37 hours.
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Paris
8 months ago
I'm not sure about that, I'm leaning towards D) 40 hours.
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Marvel
9 months ago
Haha, that joke is funny! But I think the answer is C) 30 hours.
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Frederick
9 months ago
Ha! This question is a real brain-teaser. Let me think this through... Okay, I've got it. The total downtime is 15 hours, which means the uptime is 105 hours. That's a MTBF of 30 hours, so the answer is C.
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Elden
8 months ago
That was a tricky one, but you figured it out!
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Layla
8 months ago
Yes, you're right. The MTBF of Port 6 is 30 hours.
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Luis
8 months ago
I think the answer is C) 30 hours.
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Staci
9 months 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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Julene
8 months ago
Yes, the failures overlap on Friday, so the MTBF of Port 6 is 30 hours.
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Gaynell
9 months ago
I agree, the downtime is 15 hours and the uptime is 105 hours, so the MTBF is 30 hours.
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Rima
9 months ago
I think the answer is C) 30 hours.
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Fletcher
10 months 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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Brandon
9 months ago
Great, thanks for the explanation!
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Catalina
9 months ago
So, the correct answer is B) 37 hours.
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Helaine
9 months ago
I agree with you, the MTBF of Port 6 is indeed 37 hours.
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Deandrea
9 months 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
10 months 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
10 months 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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Gayla
9 months ago
Great job! You got it right. The MTBF of Port 6 is 40 hours.
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Nguyet
9 months ago
That's right. The MTBF is calculated as the total time period divided by the total downtime, which in this case is 40 hours.
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Luis
9 months ago
Yes, you're correct. The MTBF is indeed 40 hours.
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Sue
9 months ago
D) 40 hours
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Nadine
9 months ago
C) 30 hours
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Brittni
9 months ago
B) 37 hours
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Cheryll
9 months ago
A) 32 hours
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Laticia
10 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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Allene
9 months ago
Great job on figuring out the MTBF of Port 6, it's 37 hours.
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Helga
9 months ago
Exactly, the MTBF is calculated based on the total uptime and downtime.
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Serina
9 months ago
That makes sense, the total downtime is 9 hours, so the MTBF is 37 hours.
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Dorethea
10 months ago
Yes, you got it right! The MTBF of Port 6 is indeed 37 hours.
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Lacey
10 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
10 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
10 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
10 months ago
C) 30 hours
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Pearlene
10 months ago
A) 32 hours
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Shawnda
10 months ago
I think the MTBF of Port 6 is 32 hours.
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