The IT department of a bank provides customers the access to the currency conver

Question

The IT department of a bank provides customers the access to the currency conversion rate table between 9:00 a.m. and 4:00 p.m. from Monday through Friday. It updates the table every day at 8:00 a.m. with a feed from the mainframe system. The update process takes 35 minutes to complete. On Thursday, due to a database corruption, the rate table could not be updated. At 9:05 a.m., it was identified that the table had errors. A rerun of the update was done, and the table was re-created at 9:45 a.m. Verification was run for 15 minutes, and the rate table became available to the bank branches. What was the availability of the rate table for the week in which this incident took place, assuming there were no other issues?

Explanation / Answer

Availability = total uptime/total scheduled time
Total scheduled time = 7 hrs * 5 = 35 hrs

Total up time = 34 hrs (as on Thursday rate table was made available at 10:00 am instead of 9:00 am)

Therefore, availability of the rate table for the week = 34/35

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