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1Z0-809 Practice Questions

Java SE 8 Programmer II Exam Practice Test


Total 42 Pages
Total 208 Questions

1Z0-809 Practice Questions

Question# 1

Given the definition of the Vehicle class: Class Vehhicle { int distance;//line n1 Vehicle (int x) { this distance = x; } public void increSpeed(int time) {//line n2 int timeTravel = time;//line n3 class Car { int value = 0; public void speed () { value = distance /timeTravel; System.out.println (“Velocity with new speed”+value+”kmph”); } } new Car().speed(); } } and this code fragment: Vehicle v = new Vehicle (100); v.increSpeed(60); What is the result?
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Question# 2

Given: IntStream stream = IntStream.of (1,2,3); IntFunction<Integer> inFu= x - > y - > x*y;//line n1 IntStream newStream = stream.map(inFu.apply(10));//line n2 newStream.forEach(System.out::print); Which modification enables the code fragment to compile?
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Question# 3

Given the code fragment: List<Integer> values = Arrays.asList (1, 2, 3); values.stream () .map(n - > n*2)//line n1 .peek(System.out::print)//line n2 .count(); What is the result?
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Question# 4

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?
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Question# 5

Which two reasons should you use interfaces instead of abstract classes? (Choose two.)
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