Exam DEA-1TT4 topic 1 question 3 discussion

Actual exam question from Dell's DEA-1TT4

Question #: 3
Topic #: 1

An Ethernet switch has eight ports and all ports must be operational for 24 hours, from Monday through Friday. However, a failure of Port4 occurs as follows:
"¢ Monday = 8 PM to 9 PM
"¢ Wednesday 7 PM to 9 PM
"¢ Thursday = 6 AM to 9 AM
"¢ Saturday = 4 PM to 7 PM
What is the MTTR of Port 4?

A. 2 hours
B. 3 hours
C. 28 hours
D. 38 hours

Show Suggested Answer

Suggested Answer: A 🗳️

by madmax67 at Oct. 19, 2020, 10:34 a.m.

Comments

Submit Cancel

Varunraj

Highly Voted 4 years, 7 months ago

No need to consider the downtime for Saturday since the question mentioned about Monday to Friday. So MTTR will be 6h downtime/3 incidents = 2

upvoted 18 times

...

SupremeND

Most Recent 2 years, 10 months ago

Selected Answer: A

MTTR=total time to repair/number of incidents=6/3=2

upvoted 1 times

...

zahidhkhader

3 years, 5 months ago

Selected Answer: A

Monday to Friday. So MTTR will be 6h downtime/3 incidents = 2

upvoted 1 times

...

Mahrizou

4 years, 2 months ago

MTBF: Average time available for a system or component to perform its normal operations between failures  MTBF= Total uptime / Number of failures MTTR: Average time required to repair a failed component  MTTR = Total downtime / Number of failures

upvoted 2 times

...

madmax67

4 years, 8 months ago

MTTR = Meantime to Repair. ISMv4 PArticipant Guide: MTTR: Average time required to repair a failed component MTTR = Total downtime / Number of failures Given downtimes per failure: 8 to 9 PM = 1h 7 to 9 PM = 2h 6 to 9 AM = 3h 4 to 7 PM = 3h Calculation: 9h downtime / 4 incidents = 2,25h MTTR Conclusion: 2 h 15 m should be the correct answer.

upvoted 3 times

bobbyzee

4 years ago

Downtime between Mon - Fri only. So only 6 hours /3 failures = 2 hours

upvoted 4 times

...

nicefella

4 years, 7 months ago

Kindly send me a copy of the ISMv4 Participant Guide.Thanks.

upvoted 1 times

...

hizohizo15

3 years, 5 months ago

its monday to friday...so only 6hrs downtime..dont include saturday..

upvoted 1 times

...