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1z0-819 – Java SE 11 Developer

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Showing 13–15 of 15 questions

Question 13

Given the code fragment:

You want to examine whether path is a directory. Which code inserted on line 1 will accomplish this?

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    BasicFileAttributes attributes = Files isDirectory (path);
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    BasicFileAttributes attributes =Files.getAttribute (path, ‘’insdirectory’’);
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    BasicFileAttributes attributes = Files.readAttributes(path, BasicFileAttributes.class
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    BasicFileAttributes attributes = Files, readAttributes (path, FileAttributes, class);
Question 14

Given:

When is the readObject method called?

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    before this object is deserialized
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    after this object is deserialized
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    before this object Is serialized
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    The method is never called.
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    after this object is serialized
Question 15

Given these declarations:

and these two code fragments:

Fragment 1:

Fragment 2:

Which code fragment is preferred and why?

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    Fragment 1 because it is shorter.
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    Fragment 2 because it prevents SQL injection.
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    Fragment 2 because it explicitly specifies the SQL types of the column values.
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    Fragment 1 because it is more performant.