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[General] 1z1-809 Pass4sure Exam Prep - 1z1-809 Valid Test Pdf

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【General】 1z1-809 Pass4sure Exam Prep - 1z1-809 Valid Test Pdf

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Oracle Java SE 8 Programmer II Sample Questions (Q46-Q51):NEW QUESTION # 46
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?
  • A. Velocity with new speed
  • B. A compilation error occurs at line n1.
  • C. A compilation error occurs at line n2.
  • D. A compilation error occurs at line n3.
Answer: A

NEW QUESTION # 47
Given the code fragment:
List<Integer> nums = Arrays.asList (10, 20, 8):
System.out.println (
//line n1
);
Which code fragment must be inserted at line n1 to enable the code to print the maximum number in the nums
list?
  • A. nums.stream().max(Comparator.comparing(a -> a)).get()
  • B. nums.stream().map(a -> a).max()
  • C. nums.stream().max()
  • D. nums.stream().max(Integer : : max).get()
Answer: A

NEW QUESTION # 48
Given the definition of the Emp class:
public class Emp
private String eName;
private Integer eAge;
Emp(String eN, Integer eA) {
this.eName = eN;
this.eAge = eA;
}
public Integer getEAge () {return eAge;}
public String getEName () {return eName;}
}
and code fragment:
List<Emp>li = Arrays.asList(new Emp("Sam", 20), New Emp("John", 60), New Emp("Jim", 51));
Predicate<Emp> agVal = s -> s.getEAge() > 50;//line n1
li = li.stream().filter(agVal).collect(Collectors.toList());
Stream<String> names = li.stream()map.(Emp::getEName);//line n2
names.forEach(n -> System.out.print(n + " "));
What is the result?
  • A. A compilation error occurs at line n1.
  • B. A compilation error occurs at line n2.
  • C. John Jim
  • D. Sam John Jim
Answer: C

NEW QUESTION # 49
Given the definition of the Vehicle class:
class Vehicle {
String name;
void setName (String name) {
this.name = name;
}
String getName() {
return name;
}
}
Which action encapsulates the Vehicle class?
  • A. Make the getName method private.
  • B. Make the Vehicle class public.
  • C. Make the setName method private.
  • D. Make the setName method public.
  • E. Make the name variable private.
  • F. Make the name variable public.
Answer: F

NEW QUESTION # 50
Given the code fragments:

and

What is the result?
  • A. DogCatMouse
  • B. A compilation error occurs.
  • C. null
  • D. [Dog, Cat, Mouse]
Answer: D

NEW QUESTION # 51
......
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