Attested 1Z0-819 Dumps PDF Resource [2021]
Latest 1Z0-819 Actual Free Exam Questions Updated 215 Questions
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What is Java SE 11 Developer Exam Number: 1Z0-819 Certification Exam and Retake policy
Oracle Cloud Certification credentials are only valid for a period of 18 months from the date you earn the credential. The certification will become inactive at the end of 18 months. However, for Oracle candidates, it is necessary to hold an active certification in order to have access to various certification benefits including, using Oracle certification logos, certificates, scoring reports, digital badges, and certification verification.
To stay current, candidates have to re-certify themselves with the latest version of the exam. Oracle Cloud Certifications include various titles with levels that are Oracle Certified Associate, Specialist, and Professional. Moreover, the Oracle Cloud Certifications are updated continuously throughout the year for keeping current with major product and service releases and re-released on an annual basis with a new title.
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NEW QUESTION 109
Which two statements are correct about modules in Java? (Choose two.)
- A. java.base exports all of the Java platforms core packages.
- B. module-info.java can be placed in any folder inside module-path.
- C. A module must be declared in module-info.java file.
- D. By default, modules can access each other as long as they run in the same folder.
- E. module-info.java cannot be empty.
Answer: A,C
NEW QUESTION 110
Which describes a characteristic of setting up the Java development environment?
- A. The Java development environment is set up for all operating systems by default.
- B. Setting up the Java development environment occurs when you install an IDE before the JDK.
- C. Setting up the Java development environment requires that you also install the JRE.
- D. You set up the Java development environment for a specific operating system when you install the JDK.
Answer: B
NEW QUESTION 111
Given:
Which three actions implement Java SE security guidelines? (Choose three.)
- A. Change line 6 to public synchronized String[] getNames() {.
- B. Change line 4 to this.names = names.clone();.
- C. Change line 7 to return names.clone();.
- D. Change line 2 to private final String[] names;.
- E. Change line 3 to private Secret(String[] names) {.
- F. Change the getNames() method name to get$Names().
- G. Change line 2 to protected volatile String[] names;.
Answer: D,E,G
NEW QUESTION 112
Given:
What is the type of x?
- A. List<String>
- B. char
- C. String
- D. List<Character>
Answer: C
NEW QUESTION 113
Consider this method declaration:
A) "SET SESSION AUTHORIZATION " + user
B) "SET SESSION AUTHORIZATION " + stmt.enquoteIdentifier(user)
Is A or B the correct replacement for <EXPRESSION> and why?
- A. A and B are functionally equivalent.
- B. A, because it sends exactly the value of user provided by the calling code.
- C. A, because it is unnecessary to enclose identifiers in quotes.
- D. B, because enquoting values provided by the calling code prevents SQL injection.
- E. B, because all values provided by the calling code should be enquoted.
Answer: B
NEW QUESTION 114
Which two interfaces are considered to be functional interfaces? (Choose two.)
@FunctionalInterface
- A. int GERM = 13;
public default int getGERM() { return GERM; }
}
interface InterfaceB { - B. interface InterfaceC {
public boolean equals(Object o);
int breed(int x);
int calculate(int x, int y);
}
@FunctionalInterface - C. int GERM = 13;
public default int getGERM() { return get(); }
private int get() { return GERM; }
public boolean equals(Object o);
int breed(int x);
} - D. interface InterfaceD {
int breed(int x);
}
@FunctionalInterface - E. interface InterfaceE {
public boolean equals(int i);
int breed(int x);
}
interface InterfaceA {
Answer: B,E
Explanation:
Explanation/Reference:
NEW QUESTION 115
Given:
Which two lines inserted in line 1 will allow this code to compile? (Choose two.)
- A. private void walk(){}
- B. abstract void walk();
- C. protected void walk(){}
- D. void walk(){}
- E. public abstract void walk();
Answer: C,E
NEW QUESTION 116
Given:
What is the result?
- A. 1.99,2.99,0
- B. 1.99,2.99
- C. The compilation fails.
- D. 1.99,2.99,0.0
Answer: C
Explanation:
NEW QUESTION 117
Given:
Which code fragment on line 1 makes the m map contain the employee with the highest salary for each neighborhood?
A)
B)
C)
D)
- A. Option D
- B. Option B
- C. Option A
- D. Option C
Answer: A
NEW QUESTION 118
Given:
What is the output?
- A. :APPLE:ORANGE:BANANA
appleorangebanana - B. appleorangebanana
:APPLE:ORANGE:BANANA - C. apple:APPLE orange:ORANGE banana:BANANA
- D. :APPLE:ORANGE:BANANA
- E. APPLE:apple ORANGE:orange BANANA:banana
Answer: C
Explanation:
NEW QUESTION 119
Given:
What is the output?
banana orange apple lemon
- A. -----
banana orange apple lemon apple banana lemon orange
banana orange apple lemon apple banana lemon orange - B. -----
----- - C. -----
----- - D. banana orange apple lemon
-----
apple banana lemon orange
----- - E. -----
apple banana lemon orange
-----
-----
Answer: A
Explanation:
NEW QUESTION 120
Given:
and omitting the throws FooException clause results in a compilation error.
Which statement is true about FooException?
- A. The body of foo can throw FooException or one of its subclasses.
- B. The body of foo can only throw FooException.
- C. FooException is a subclass of RuntimeError.
- D. FooException is unchecked.
Answer: A
NEW QUESTION 121
Given:
What is the result?
- A. abcd
- B. abdf
- C. adf
- D. The compilation fails.
- E. abd
Answer: A
NEW QUESTION 122
Given:
Which is true?
- A. System.in is the standard input stream. The stream is already open.
- B. System.in cannot reassign the other stream.
- C. System.out is the standard output stream. The stream is open only when System.out is called.
- D. System.out is an instance of java.io.OutputStream by default.
Answer: A
NEW QUESTION 123
Given:
Which statement on line 1 enables this code fragment to compile?
- A. Function<String> function = m > m.toUpperCase();
- B. Function function = String::toUpperCase;
- C. UnaryOperator<String> function = String::toUpperCase;
- D. UnaryOperator function = s > s.toUpperCase();
Answer: C
Explanation:
NEW QUESTION 124
Given the code fragment:
What is the result?
- A. false true false
- B. true false false
- C. false false true
- D. false true true
Answer: A
Explanation:
NEW QUESTION 125
Which code fragment compiles?
- A. Option D
- B. Option B
- C. Option A
- D. Option C
Answer: A
Explanation:
NEW QUESTION 126
Given:
What is the expected result of javac?
- A. javac compiles Mycar.java without errors or warnings.
- B. javac fails to compile the class and prints the error message, Error: Could not find or load main class Mycar.class
- C. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: expected import java.lang
- D. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: package java does not exist
Answer: A
NEW QUESTION 127
Examine these module declarations:
Which two statements are correct? (Choose two.)
- A. The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the
- B. The Consumer module should require the ServiceProvider module.
- C. The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.
- D. The ServiceProvider module should export the com.myimpl package.
- E. The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.
Answer: B,E
Explanation:
com.example.api API.
NEW QUESTION 128
Given the code fragment:
What is the result?
- A. gh ij kl
- B. ghi jkl
- C. The compilation fails.
- D. gj hk il
- E. An ArrayIndexOutofBoundsException is thrown at runtime.
Answer: E
NEW QUESTION 129
Given:
var fruits = List.of("apple", "orange", "banana", "lemon");
You want to examine the first element that contains the character n. Which statement will accomplish this?
- A. Optional<String> result = fruits.stream().anyMatch(f > f.contains("n"));
- B. fruits.stream().filter(f > f.contains("n")).forEachOrdered(System.out::print);
- C. String result = fruits.stream().filter(f > f.contains("n")).findAny();
- D. Optional<String> result = fruits.stream().filter(f > f.contains ("n")).findFirst ();
Answer: B
Explanation:
NEW QUESTION 130
Given:
What prevents this code from compiling?
- A. Cylinderrequires an implementation of calculateSurfaceAreawith two parameters.
- B. The calculateSurfaceAreamethod within Cylinder must be declared default.
- C. The calculateSurfaceAreamethod within Rectangle and Ellipserequires a publicaccess modifier.
- D. Cylinderis not properly calling the Rectangle and Ellipseinterfaces' calculateSurfaceArea methods.
Answer: D
NEW QUESTION 131
......
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