1Z0-829 Practice Question: Handling Date, Time, Text, Numeric and Boolean Values
This 1Z0-829 practice question tests your understanding of handling date, time, text, numeric and boolean values. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which two statements about the java.time.Duration class are true? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Duration can be negative.
Option B is correct because the java.time.Duration class can represent negative durations, such as when the end instant is before the start instant in a Duration.between() call. Option C is correct because all classes in the java.time package, including Duration, are immutable and thread-safe by design, ensuring safe concurrent access without synchronization.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Duration supports units like months and years.
Why it's wrong here
Incorrect: Duration only supports days, hours, minutes, seconds, and nanoseconds.
✓
Duration can be negative.
Why this is correct
Correct: Duration can represent a negative amount of time.
Related concept
Read the scenario before looking for a memorised answer.
✓
Duration is immutable and thread-safe.
Why this is correct
Correct: All java.time classes are immutable and thread-safe.
Related concept
Read the scenario before looking for a memorised answer.
✗
Duration.between(LocalDate.now(), LocalDate.now()) returns a Duration.
Why it's wrong here
Incorrect: Duration.between requires temporals with seconds; use between LocalDateTimes.
✗
Duration uses a days-based representation.
Why it's wrong here
Incorrect: Duration uses seconds and nanoseconds; days are converted to seconds.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Duration with Period, assuming Duration supports months/years, or incorrectly think Duration.between() works with any date-time type like LocalDate, when it actually requires time-based temporals such as LocalTime, LocalDateTime, or Instant.
Detailed technical explanation
How to think about this question
Under the hood, Duration stores a long for seconds and an int for nanoseconds, allowing a range of ±9,223,372,036,854,775,807 seconds (over 292 years). A subtle behavior is that Duration.between() throws DateTimeException if the temporals do not support the SECONDS field, which is why LocalDate fails. In real-world scenarios, Duration is ideal for measuring elapsed time in operations like timeout intervals or performance benchmarks, where precision down to nanoseconds is needed.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 1Z0-829 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Handling Date, Time, Text, Numeric and Boolean Values — This question tests Handling Date, Time, Text, Numeric and Boolean Values — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Duration can be negative. — Option B is correct because the java.time.Duration class can represent negative durations, such as when the end instant is before the start instant in a Duration.between() call. Option C is correct because all classes in the java.time package, including Duration, are immutable and thread-safe by design, ensuring safe concurrent access without synchronization.
What should I do if I get this 1Z0-829 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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