Free quiz app for Upgrade to Java SE 7 Programmer certification exam.

[Prasad Saya]

Java Quiz Player is a desktop app. This app is a quiz (or mock test) for Upgrade to Java SE 7 Programmer certification exam (OCPJP).

The quiz question topics are specific to the upgrade exam and has 80 questions. The quiz is useful for this certification preparation.

Visit www.javaquizplayer.com to get the app. The website also has pages with the app screenshots and sample questions.


Prasad Saya.

[sarvesh dikonda]

can someone explain the Question 6 in detail-

Consider the code:

String pattern = "glob:d**/f?";
PathMatcher pm = FileSystems.getDefault().getPathMatcher(pattern);
Path path = Paths.get(pathString); // statement (1)
pm.matches(path); // statement (2)

Assume the code compiles without errors and runs.

Which of the following pathString values when used in the above code at statement (1), individually, returns a true value at statement (2):

(a) "dir1/test1/test2/test3/f1"
(b) "dir1/test1/test2/test3/f"
(c) "dir12/f"
(d) "dir/f2"
 

The output is -

Answer Details:
(a) and (d) are correct.
(b) and (c) are incorrect.

Can someone explain why a and d are correct ?

[Prasad Saya]

import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.Files;
import java.nio.file.FileSystems;
import java.nio.file.FileSystem;
import java.nio.file.PathMatcher;

class PathMatcherExample {
	public static void main (String [] args)
			throws Exception {
		String syntaxPattern = "glob:dir**/f?";
		FileSystem fs = FileSystems.getDefault();
		PathMatcher pm = fs.getPathMatcher(syntaxPattern);
		String str = "dir/f";	// STATEMENT A
		Path path = Paths.get(str);
		boolean bool = pm.matches(path);
		System.out.println("bool: " + bool);
	}
}

1. Create the PathMatcherExample.java source code and compile.
2. Run the code and verify the console output as: false
3. Substitute the code at STATEMENT A with: String str = "dir/f2";
4. Compile and run the code and verify the console output as: true

Please see the Java SE 7 API documents, for the import classes in the PathMatcherExample.java for details.