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[General] 100% Pass Quiz Oracle - Accurate Valid 1z0-809 Exam Cost

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【General】 100% Pass Quiz Oracle - Accurate Valid 1z0-809 Exam Cost

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Oracle Java SE 8 Programmer II Sample Questions (Q56-Q61):NEW QUESTION # 56
Which statement is true about java byte code?
  • A. It can run on any platform only If it was compiled for that platform.
  • B. It can run on any platform that has the Java Runtime Environment.
  • C. It can run on any platform.
  • D. It can run on any platform only if that platform has both the Java Runtime Environment and a Java compiler.
  • E. It can run on any platform that has a Java compiler.
Answer: B

NEW QUESTION # 57
Given:
public class Emp {
String fName;
String lName;
public Emp (String fn, String ln) {
fName = fn;
lName = ln;
}
public String getfName() { return fName; }
public String getlName() { return lName; }
}
and the code fragment:
List<Emp> emp = Arrays.asList (
new Emp ("John", "Smith"),
new Emp ("Peter", "Sam"),
new Emp ("Thomas", "Wale"));
emp.stream()
//line n1
.collect(Collectors.toList());
Which code fragment, when inserted at line n1, sorts the employees list in descending order of fName and then ascending order of lName?
  • A. .map(Emp::getfName).sorted(Comparator.reserveOrder())
  • B. .map(Emp::getfName).sorted(Comparator.reserveOrder().map(Emp::getlName).reserved
  • C. .sorted (Comparator.comparing(Emp::getfName).thenComparing(Emp::getlName))
  • D. .sorted
    (Comparator.comparing(Emp::getfName).reserved().thenComparing(Emp::getlName))
Answer: D

NEW QUESTION # 58
Given:

and

Which interface from the java.util.function package should you use to refactor the class Txt?
  • A. Supplier
  • B. Predicate
  • C. Consumer
  • D. Function
Answer: A

NEW QUESTION # 59
Given:
public class Foo<K, V> {
private K key;
private V value;
public Foo (K key, V value) (this.key = key; this value = value;)
public static <T> Foo<T, T> twice (T value) (return new Foo<T, T> (value, value); )
public K getKey () (return key;)
public V getValue () (return value;)
}
Which option fails?
  • A. Foo<String, String> grade = new Foo <> ("John", "A");
  • B. Foo<String, String> pair = Foo.<String>twice ("Hello World!");
  • C. Foo<?, ?> percentage = new Foo <> (97, 32););
  • D. Foo<String, Integer> mark = new Foo<String, Integer> ("Steve", 100););
Answer: C

NEW QUESTION # 60
Which three statements are benefits of encapsulation?
  • A. Enables multiple instances of the same class to be created safely
  • B. Enables the class implementation to protect its invariants
  • C. Protects confidential data from leaking out of the objects
  • D. Permits classes to be combined into the same package
  • E. Prevents code from causing exceptions
  • F. Allows a class implementation to change without changing t he clients
Answer: B,C,F

NEW QUESTION # 61
......
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