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[General] New Exam 1z0-809 Braindumps, Latest Braindumps 1z0-809 Ebook

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【General】 New Exam 1z0-809 Braindumps, Latest Braindumps 1z0-809 Ebook

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Oracle Java SE 8 Programmer II Sample Questions (Q189-Q194):NEW QUESTION # 189
Which two reasons should you use interfaces instead of abstract classes? (Choose two.)
  • A. You want to declare non-static on non-final fields.
  • B. You expect that unrelated classes would implement your interfaces.
  • C. You expect that classes that implement your interfaces have many common methods or fields, or require access modifiers other than public.
  • D. You want to take advantage of multiple inheritance of type.
  • E. You want to share code among several closely related classes.
Answer: B,D
Explanation:
References:

NEW QUESTION # 190
Given:

Your design requires that:
fuelLevel of Engine must be greater than zero when the start()method is invoked.

The code must terminate if fuelLevelof Engineis less than or equal to zero.

Which code fragment should be added at line n1to express this invariant condition?
  • A. assert fuelLevel > 0: "Impossible fuel" ;
  • B. assert (fuelLevel) : "Terminating...";
  • C. assert (fuelLevel > 0) : System.out.println ("Impossible fuel");
  • D. assert fuelLevel < 0: System.exit(0);
Answer: D

NEW QUESTION # 191
Given the code fragment:
public static void main (String [ ] args) throws IOException {
BufferedReader br = new BufferedReader (new InputStremReader
(System.in));
System.out.print ("Enter GDP: ");
//line 1
}
Which code fragment, when inserted at line 1, enables the code to read the GDP from the user?
  • A. int GDP = Integer.parseInt (br.readline());
  • B. int GDP = Integer.parseInt (br.next());
  • C. int GDP = br.read();
  • D. int GDP = br.nextInt();
Answer: A

NEW QUESTION # 192
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 ( o1); } } );
treeMap.putAll (unsortMap);
for (Map.Entry<Integer, String> entry : treeMap.entrySet () ) {
System.out.print (entry.getValue () + " ");
}
}
}
What is the result?
  • A. z b d e j
  • B. j z e b d
  • C. d b e z j
  • D. A compilation error occurs.
Answer: B

NEW QUESTION # 193
Given the code fragments:

and

What is the result?
  • A. France
    Not Found
  • B. Optional [France]
    Optional [NotFound]
  • C. Optional[France]
    Not Found
  • D. France
    Optional[NotFound]
Answer: A

NEW QUESTION # 194
......
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