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Oracle 1Z0-809 Exam Dumps

Vendor: Oracle
Exam Code: 1Z0-809
Exam Name: Java SE 8 Programmer II
Certification: Oracle Database
Total Questions: 207 Q&A
Updated on: Nov 13, 2024
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1Z0-809 Online Practice Questions and Answers

Questions 1

Given the definition of the Country class:

public class country {

public enum Continent {ASIA, EUROPE}

String name;

Continent region;

public Country (String na, Continent reg) {

name = na, region = reg;

}

public String getName () {return name;}

public Continent getRegion () {return region;}

}

and the code fragment:

List couList = Arrays.asList (

new Country ("Japan", Country.Continent.ASIA),

new Country ("Italy", Country.Continent.EUROPE),

new Country ("Germany", Country.Continent.EUROPE));

Map> regionNames = couList.stream ()

.collect(Collectors.groupingBy (Country ::getRegion,

Collectors.mapping(Country::getName, Collectors.toList()))));

System.out.println(regionNames);

A. {EUROPE = [Italy, Germany], ASIA = [Japan]}

B. {ASIA = [Japan], EUROPE = [Italy, Germany]}

C. {EUROPE = [Germany, Italy], ASIA = [Japan]}

D. {EUROPE = [Germany], EUROPE = [Italy], ASIA = [Japan]}

Show Answer

Questions 2

Given the code fragment:

Which should be inserted into line n1 to print Average = 2.5?

A. IntStream str = Stream.of (1, 2, 3, 4);

B. IntStream str = IntStream.of (1, 2, 3, 4);

C. DoubleStream str = Stream.of (1.0, 2.0, 3.0, 4.0);

D. Stream str = Stream.of (1, 2, 3, 4);

Show Answer

Questions 3

Given the definition of the Vehicle class:

Which action encapsulates the Vehicle class?

A. Make the Vehicle class private.

B. Make the name variable public.

C. Make the getName() and setName() method public.

D. Make the name variable private.

E. Make the getName() and setName() method private.

Show Answer More Questions

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