The answer is the `Files.copy(source, target, COPY_ATTRIBUTES)` method from the NIO.2 API. This is correct because the `COPY_ATTRIBUTES` standard copy option explicitly instructs the file system to preserve metadata such as last modified time, last access time, and permissions during the copy operation, whereas the default `Files.copy` call only transfers file content. On the Oracle Certified Professional Java SE 17 Developer 1Z0-829 exam, this question tests your understanding of the `java.nio.file.StandardCopyOption` enum and the distinction between content-only copies and attribute-preserving copies. A common trap is confusing `COPY_ATTRIBUTES` with `REPLACE_EXISTING`—remember that `REPLACE_EXISTING` only overwrites the target file, not its attributes. For a quick memory tip, think "C-A-P" for Copy Attributes Preserved: when you need to keep timestamps and permissions, always pass `COPY_ATTRIBUTES` as the third argument to `Files.copy`.
1Z0-829 Java I/O API and Securing Applications Practice Question
This 1Z0-829 practice question tests your understanding of java i/o api and securing applications. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
A developer wants to copy all files from one directory to another, preserving file attributes (e.g., last modified time, permissions). Which NIO.2 method is most appropriate?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Files.copy(source, target, COPY_ATTRIBUTES)
Option A is correct because the `Files.copy(source, target, COPY_ATTRIBUTES)` method from the NIO.2 API copies the content of the file and, when the `COPY_ATTRIBUTES` option is specified, also preserves the file's metadata attributes such as last modified time, last access time, and permissions (where supported by the underlying file system). This option is specifically designed for copying with attribute preservation, making it the most appropriate choice for the developer's requirement.
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.
✓
Files.copy(source, target, COPY_ATTRIBUTES)
Why this is correct
COPY_ATTRIBUTES ensures attributes are preserved during copy.
Related concept
Read the scenario before looking for a memorised answer.
✗
Files.copy(source, target, REPLACE_EXISTING)
Why it's wrong here
This replaces the target but does not preserve attributes.
✗
Files.move(source, target, ATOMIC_MOVE)
Why it's wrong here
Move operation does not necessarily preserve all attributes and is not a copy.
✗
Files.walkFileTree() with a custom FileVisitor that copies files
Why it's wrong here
Possible but not the simplest one-step method for copying with attributes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse `REPLACE_EXISTING` with attribute preservation, assuming that replacing the target file inherently copies all metadata, when in fact `COPY_ATTRIBUTES` must be explicitly specified to preserve attributes.
Detailed technical explanation
How to think about this question
Under the hood, `Files.copy` with `COPY_ATTRIBUTES` delegates to the underlying file system provider (e.g., UnixFileSystemProvider on Linux) which uses system calls like `stat` and `setattr` to read and write metadata such as `BasicFileAttributes` (lastModifiedTime, lastAccessTime, creationTime) and `PosixFileAttributes` (permissions, owner, group). A subtle behavior is that `COPY_ATTRIBUTES` does not guarantee preservation of all attributes across different file systems (e.g., copying from NTFS to ext4 may lose ACLs or extended attributes), and it does not copy the file's security descriptor or alternate data streams on Windows unless additional options are used.
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.
Java I/O API and Securing Applications — This question tests Java I/O API and Securing Applications — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Files.copy(source, target, COPY_ATTRIBUTES) — Option A is correct because the `Files.copy(source, target, COPY_ATTRIBUTES)` method from the NIO.2 API copies the content of the file and, when the `COPY_ATTRIBUTES` option is specified, also preserves the file's metadata attributes such as last modified time, last access time, and permissions (where supported by the underlying file system). This option is specifically designed for copying with attribute preservation, making it the most appropriate choice for the developer's requirement.
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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