Java OCA OCP Practice Question 2900

Question

Assuming the current directory is /data/cute, which are possible results of executing the following code? (Choose all that apply.). 


Files.walk(Paths.get("..").toRealPath().getParent())  // u1 
   .map(p -> p.toAbsolutePath().toString()) // u2 
   .filter(s -> s.endsWith(".java")) // u3 
   .collect(Collectors.toList()) 
   .forEach(System.out::println);
  • A. It compiles but may throw an exception at runtime.
  • B. The code will not compile because of line u1.
  • C. The code will not compile because of line u2.
  • D. The code will not compile because of line u3.
  • E. It prints all .java files in the /data directory tree.
  • F. It prints all .java files in the /data/cute directory tree.
  • G. It prints all .java files in the root directory tree.


A, G.

Note

The code compiles without issue, so B, C, and D are incorrect.

The first line actually resolves to the root path since .. and getParent()are conceptually equivalent.

Therefore, G is correct and E and F are incorrect.

A is also correct since it may encounter a file that it does not have access to read, which is common when trying to read an entire file system.




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