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The Oracle 1z0-809 exam consists of 85 multiple-choice and drag-and-drop questions, which you must complete within 150 minutes. 1z0-809 exam covers a range of topics, including Java Class Design, Generics and Collections, Lambda Built-in Functional Interfaces, Java Stream API, Java I/O Fundamentals, Java Concurrency, Building Database Applications with JDBC, and Localization. Passing the Oracle 1z0-809 Exam is a great way to demonstrate your advanced Java programming skills and enhance your career opportunities in the field of software development.
Real Oracle 1z0-809 Question - 1z0-809 Exam TopicOnce you get the Oracle 1z0-809 certificate, you can quickly quit your current job and then change a desirable job. The Oracle 1z0-809 certificate can prove that you are a competent person. So it is easy for you to pass the interview and get the job. The assistance of our 1z0-809 practice quiz will change your life a lot. Oracle Java SE 8 Programmer II Sample Questions (Q93-Q98):NEW QUESTION # 93
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<Country> couList = Arrays.asList (
new Country ("Japan", Country.Continent.ASIA),
new Country ("Italy", Country.Continent.EUROPE),
new Country ("Germany", Country.Continent.EUROPE));
Map<Country.Continent, List<String>> regionNames = couList.stream ()
.collect(Collectors.groupingBy (Country ::getRegion,
Collectors.mapping(Country::getName, Collectors.toList()))));
System.out.println(regionNames);
What is the output?
A. {EUROPE = [Germany, Italy], ASIA = [Japan]}
B. {EUROPE = [Italy, Germany], ASIA = [Japan]}
C. {EUROPE = [Germany], EUROPE = [Italy], ASIA = [Japan]}
D. {ASIA = [Japan], EUROPE = [Italy, Germany]}
Answer: B
NEW QUESTION # 94
Given:
public class Canvas implements Drawable {
public void draw () { }
}
public abstract class Board extends Canvas { }
public class Paper extends Canvas {
protected void draw (int color) { }
}
public class Frame extends Canvas implements Drawable {
public void resize () { }
}
public interface Drawable {
public abstract void draw ();
}
Which statement is true?
A. Framedoes not compile.
B. Paperdoes not compile.
C. Drawabledoes not compile.
D. Boarddoes not compile.
E. All classes compile successfully.
Answer: E
NEW QUESTION # 95
Which two statements are true about localizing an application? (Choose two.)
A. Support for new regional languages does not require recompilation of the code.
B. Textual elements (messages and GUI labels) are hard-coded in the code.
C. Resource bundle files include data and currency information.
D. Language codes use lowercase letters and region codes use uppercase letters.
E. Language and region-specific programs are created using localized data.
NEW QUESTION # 96
Given:
Which two interfaces can you use to create lambda expressions? (Choose two.)
A. Q
B. R
C. S
D. T
E. P
F. U
Answer: C,E
NEW QUESTION # 97
Given the code fragment:
Which code fragment, when inserted at line 9, enables the code to print true?
A. String str2 = sb1.toString ( );
B. String str2 = "Duke";
C. String str2 = str1;
D. String str2 = new String (str1);
Answer: C
Explanation:
StringBuilder sb1 = new StringBuilder("Duke");
String str1 = sb1.toString();
String str2 = str1;
//String str2 = "Duke";
//String str2 = new String(str1);
System.out.println(str1 == str2);
}}
NEW QUESTION # 98
......
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