1Z0-829 Practice Question: Handling Date, Time, Text, Numeric and Boolean Values
Exhibit
Error: java.time.format.DateTimeParseException: Text '2024-06-30T23:59:60' could not be parsed: Invalid value for SecondOfMinute (valid values 0 - 59): 60
Refer to the exhibit. Which concept does this error relate to?
⚠ Common exam trap
Oracle often tests the distinction between Daylight Saving Time (hour shifts) and leap seconds (second shifts), trapping candidates who confuse the two because both involve 'adjusting time' but at fundamentally different granularities.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Leap seconds
The error relates to leap seconds because the exhibit (not shown here) likely involves a date-time calculation or parsing failure caused by the extra second (23:59:60) that is occasionally inserted into UTC to keep atomic time in sync with astronomical time. Java's `java.time` API, such as `LocalTime.parse()`, does not handle the 60th second, throwing a `DateTimeException` when encountering a leap second value.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ISO week date
Why it's wrong here
Incorrect: ISO week date is unrelated to leap seconds.
- ✗
Time zone offsets
Why it's wrong here
Incorrect: Time zone offsets are represented separately.
- ✗
Daylight Saving Time
Why it's wrong here
Incorrect: DST affects hours, not seconds.
- ✓
Leap seconds
Why this is correct
Correct: 60 seconds is a leap second, which is not valid in java.time parsing.
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