1z1-809 무료 덤프문제 온라인 액세스

Given the code fragment:
public class Foo {
public static void main (String [ ] args) {
Map<Integer, String> unsortMap = new HashMap< > ( );
unsortMap.put (10, "z");
unsortMap.put (5, "b");
unsortMap.put (1, "d");
unsortMap.put (7, "e");
unsortMap.put (50, "j");
Map<Integer, String> treeMap = new TreeMap <Integer, String> (new
Comparator<Integer> ( ) {
@Override public int compare (Integer o1, Integer o2) {return o2.compareTo (o2); } } ); treeMap.putAll (unsortMap); for (Map.Entry<Integer, String> entry : treeMap.entrySet () ) { System.out.print (entry.getValue () + " ");
}
}
}
What is the result?

• A.A compilation error occurs.
• B.j z e b d
• C.z b d e j
• D.d b e z j

Given the code fragment:
List<String> nL = Arrays.asList("Jim", "John", "Jeff");
Function<String, String> funVal = s -> "Hello : ".concat(s);
nL.Stream()
.map(funVal)
.forEach(s-> System.out.print (s));
What is the result?

• A.A compilation error occurs.
• B.Jim John Jeff
• C.Hello : Jim Hello : John Hello : Jeff
• D.The program prints nothing.

Which two are elements of a singleton class? (Choose two.)

• A.a public static method to return a copy of the singleton reference
• B.a private constructor to the class
• C.a transient reference to point to the single instance
• D.a public method to instantiate the single instance
• E.a public reference to point to the single instance

Given the Greetings.properties file, containing:

and given:

What is the result?

• A.Hello, everyone!
• B.HELLO_MSG
• C.Compilation fails.
• D.Goodbye everyone!
• E.GOODBY_MSG

Given the code fragments:

and

What is the result?

• A.Optional[France]Not Found
• B.Optional [France]Optional [NotFound]
• C.FranceNot Found
• D.FranceOptional[NotFound]