[HD-OCP17/21-Fundamentals Pg 0, Sec. 22.7.0 - quiz]

[joaoclopes]

Hello,

There is a typo on the calculated date on Q1:

Code: Select all

z3 is 2024/7/1 14:30:30Zand z4 is 2024/7/1 04:30:30Z.

z4 should be 2024/7/1 05:10:30Z because 10:40:30 - (+5:30) is 05:10:30

Thanks!

[admin]

Your are right. The explanation has been updated to:

To compare them, you need to translate these times into a common UTC time. Since NYC is 4 hours behind UTC, you have to add 4 to NYC time to get UTC time and since Calcutta is 5:30 hours ahead of UTC, you have to subtract 5:30 to get UTC time. (Note that in terms of "offset" values, the offset for NYC is minus 4 and the offset for Calcutta is plus 5:30). Thus, z3 can be computed as 10:30+4 i.e. 14:30, and so z3 is 2024/7/1 14:30Z and z4 is 2024/7/1 05:00Z (10:30-5:30). Since 14:30 is after 5:00, z3.isAfter(z4) will return true.

[joaoclopes]

Glad that I could help!

[Sophia2005]

Oh. I didn't notice that mistake. You are so perceptive.
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