Nov-2022 New Version 1Z0-819 Certificate & Helpful Exam Dumps is Online
1Z0-819 Free Certification Exam Material with 225 Q&As
NEW QUESTION 69
Given:
Which three are true? (Choose three.)
- A. f1.foo(c) prints Hello world!
- B. f2.foo(c) prints Bonjour le monde!
- C. f1.foo(c) prints Bonjour le monde!
- D. b1.foo(c) prints Bonjour le monde!
- E. f2.foo(c) prints Hello world!
- F. f2.foo(c) prints Ola Mundo!
- G. b1.foo(c) prints Ola Mundo!
- H. b1.foo(c) prints Hello world!
- I. f1.foo(c) prints Ola Mundo!
Answer: A,B,G
NEW QUESTION 70
Given:
What is the result?
- A. The program prints nothing.
- B. Take extra care
- C. An exception is thrown at runtime
- D. Take extra care
Take extra care
Answer: C
NEW QUESTION 71
Given the code fragment:
List<Integer> list = List.of(11,12,13,12,13);
Which statement causes a compile time error?
- A. Integer a = Integer.valueOf(list.get(0));
- B. Integer b = list.get(0);
- C. Double d = list.get(0);
- D. int c =list.get(0);
- E. Double e = Double.valueOf(list.get(0));
- F. double f = list.get(0);
Answer: A
NEW QUESTION 72
Which declaration of an annotation type is legal?
@interface Author {
- A. String name() default "";
String date();
}
@interface Author extends Serializable { - B. String name() default null;
String date();
}
@interface Author { - C. String name();
String date;
}
@interface Author { - D. String name();
String date default "";
} - E. String name() default "";
String date();
}
@interface Author {
Answer: A
NEW QUESTION 73
Given:
Which three actions implement Java SE security guidelines? (Choose three.)
- A. Change line 2 to protected volatile String[] names;.
- B. Change line 4 to this.names = names.clone();.
- C. Change line 7 to return names.clone();.
- D. Change line 6 to public synchronized String[] getNames() {.
- E. Change the getNames() method name to get$Names().
- F. Change line 3 to private Secret(String[] names) {.
- G. Change line 2 to private final String[] names;.
Answer: A,F,G
NEW QUESTION 74
Given:
What is the output?
- A. :APPLE:ORANGE:BANANA
appleorangebanana - B. :APPLE:ORANGE:BANANA
- C. apple:APPLE orange:ORANGE banana:BANANA
- D. APPLE:apple ORANGE:orange BANANA:banana
- E. appleorangebanana
:APPLE:ORANGE:BANANA
Answer: C
Explanation:
NEW QUESTION 75
A bookstore's sales are represented by a list of Sale objects populated with the name of the customer and the books they purchased.
public class Sale {
private String customer;
private List<Book> items;
// constructor, setters and getters not shown
}
public class Book {
private String name;
private double price;
// constructor, setters and getters not shown
}
Given a list of Sale objects, tList, which code fragment creates a list of total sales for each customer in ascending order?
- A. Option A
- B. Option C
- C. Option D
- D. Option B
Answer: B
NEW QUESTION 76
Which three guidelines are used to protect confidential information? (Choose three.)
- A. Treat user input as normal information.
- B. Transparently handle information to improve diagnostics.
- C. Manage confidential and other information uniformly.
- D. Limit access to objects holding confidential information.
- E. Validate input before storing confidential information.
- F. Encapsulate confidential information.
- G. Clearly identify and label confidential information.
Answer: B,D,E
NEW QUESTION 77
Given:
Which two lines can replace line 1 so that the Y class compiles? (Choose two.)
- A. super.set(List<String> map)
- B. set(map.values());
- C. map.forEach((k, v) -> set(v)));
- D. set(map)
- E. super.set(map.values());
Answer: B,E
NEW QUESTION 78
Which interface in the java.util.function package can return a primitive type?
- A. LongConsumer
- B. ToDoubleFunction
- C. BiFunction
- D. Supplier
Answer: B
NEW QUESTION 79
Given:
Which three classes successfully override printOne()? (Choose three.)
- A. Option A
- B. Option E
- C. Option C
- D. Option F
- E. Option D
- F. Option B
Answer: A,C,E
NEW QUESTION 80
Why does this compilation fail?
- A. The method x. print (object) is not accessible to Y.
- B. The method print (object) and the method print (object...) are duplicates of each other.
- C. The method Y. print (object...) cannot override the final method x.print (object....).
- D. In method x. print (Collection), system. Out :: prints is an invalid Java identifier.
- E. The method Y. print (object) does not call the method super.print (object)
Answer: B
NEW QUESTION 81
Given:
You want to obtain the Stream object on reading the file. Which code inserted on line 1 will accomplish this?
- A. var lines = Files.lines(Paths.get(INPUT_FILE_NAME));
- B. Stream<String> lines = Files.lines(INPUT_FILE_NAME);
- C. Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
- D. var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
Answer: D
NEW QUESTION 82
Given:
Which statement is true?
- A. Tester must import java.time.LocalDate in order to compile.
- B. All classes from the package java.time. are loaded for the class Diary.
- C. Only LocalDate class from java.time package is loaded.
- D. Class Tester does not need to import java.time.LocalDate because it is already visible to members of the package test.
Answer: D
NEW QUESTION 83
Given:
What is the result?
- A. The compilation fails.
- B. Map: 4 Keys: 0 Values: 0
- C. Map: 0 Keys: 4 Values: 4
- D. Map: 4 Keys: 4 Values: 4
- E. Map: 0 Keys: 0 Values: 0
Answer: B
Explanation:
NEW QUESTION 84
Given:
Which statement on line 1 enables this code to compile?
- A. Function<Integer, Integer> f = n > n * 2;
- B. Function<int, int> f = n > n * 2;
- C. Function<Integer> f = n > n * 2;
- D. Function<int> f = n > n * 2;
- E. Function f = n > n * 2;
Answer: A
Explanation:
NEW QUESTION 85
Given the code fragment:
Which two code snippets inserted independently inside print method print Mondial: domainmodal?
- A. prefix + Main, name
- B. prefix + name
- C. Main.prefix + Main.name
- D. new Main (} .prefix + new Main().name
- E. Main.prefix + Main.getName()
- F. prefix + getName
Answer: A,D
NEW QUESTION 86
How many Thing objects are eligible for garbage collection in line 1?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
Answer: E
NEW QUESTION 87
......
Understanding functional and technical aspects of Java SE 11 Developer Exam Number: 1Z0-819
The following will be discussed in the ORACLE 1Z0-006 exam dumps:
- Use local variable type inference, including as lambda parameters
- Handle text using String and StringBuilder classes
- Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting
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