Given the code fragment:

Which code fragment, when inserted at line n1, enables the code to print /First.txt?

Given the Greetings.propertiesfile, containing:

and given:

What is the result?

Given the code fragment:
List<String> str = Arrays.asList ("my", "pen", "is", "your', "pen"); Predicate<String> test = s -> {
int i = 0;
boolean result = s.contains ("pen");
System.out.print(i++) + ":");
return result;
};
str.stream()
.filter(test)
.findFirst()
.ifPresent(System.out ::print);
What is the result?

Given the code fragment:
List<Integer> codes = Arrays.asList (10, 20);
UnaryOperator<Double> uo = s -> s +10.0;
codes.replaceAll(uo);
codes.forEach(c -> System.out.println(c));
What is the result?

Given the code fragment:
public void recDelete (String dirName) throws IOException {
File [ ] listOfFiles = new File (dirName) .listFiles();
if (listOfFiles ! = null && listOfFiles.length >0) {
for (File aFile : listOfFiles) {
if (aFile.isDirectory ()) {
recDelete (aFile.getAbsolutePath ());
} else { if (aFile.getName ().endsWith (".class")) aFile.delete (); } } } }
Assume that Projects contains subdirectories that contain .class files and is passed as an argument to the recDelete () method when it is invoked.
What is the result?