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Certification Path for Java SE 11 Developer Exam Number: 1Z0-819
Java SE 11 Developer Exam Number: 1Z0-819 is a fundamental exam. Successful completion by candidates will allow them to achieve Oracle Certified Professional: Java SE 11 Developer.
Oracle 1z1-819 Exam Syllabus Topics:
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How to book the Java SE 11 Developer Exam Number: 1Z0-819
You register with an Oracle partner pearsonvue.com, tie your Oracle account, choose whether you want to pass in the center or from home. If you choose the option from home, you will be followed through the camera and microphone throughout the exam, there should be no one in the room, you can not talk to anyone and look only at the screen, the Internet must be stable, without troubles, otherwise, the result will be canceled.
NEW QUESTION 126
Which statement about a functional interface is true?
- A. It must be annotated with @FunctionalInterface.
- B. It cannot have any private methods and static methods.
- C. It is declared with a single abstract method.
- D. It must be defined with the public access modifier.
- E. It is declared with a single default method.
Answer: C
NEW QUESTION 127
Given the code fragment:
What is the result?
- A. 2 : 3
- B. -1 : 2
- C. 3 : 0
- D. 2 : -1
Answer: D
NEW QUESTION 128
Given:
Which loop incurs a compile time error?
- A. the loop starting line 3
- B. the loop starting line 14
- C. the loop starting line 11
- D. the loop starting line 7
Answer: B
NEW QUESTION 129
Given:
Which three are true? (Choose three.)
- A. f2.foo(c) prints Bonjour le monde!
- B. f2.foo(c) prints Ola Mundo!
- C. b1.foo(c) prints Bonjour le monde!
- D. f2.foo(c) prints Hello world!
- E. b1.foo(c) prints Ola Mundo!
- F. b1.foo(c) prints Hello world!
- G. f1.foo(c) prints Bonjour le monde!
- H. f1.foo(c) prints Hello world!
- I. f1.foo(c) prints Ola Mundo!
Answer: A,E,H
NEW QUESTION 130
Given the code fragment:
What is the output?
- A. A runtime exception is thrown.
- B. [-1, -2, -3]
- C. [-3, -2, -1]
- D. The compilation fails.
Answer: A
NEW QUESTION 131
Given an application with a main module that has this module-info.java file:
Which two are true? (Choose two.)
- A. A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.
- B. An implementation of country.countryDetails can be added to the main module.
- C. To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.
- D. A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.
- E. To compile without an error, the application must have at least one module in the module source path that provides an implementation of country.CountryDetails.
Answer: D,E
Explanation:
Reference:
/java-9-error-not-in-a-module-on-the-module-source- path
NEW QUESTION 132
Given the code fragment:
You want to examine whether path is a directory.
Which code inserted on line 1 will accomplish this?
- A. BasicFileAttributes attributes = Files isDirectory (path);
- B. BasicFileAttributes attributes =Files.getAttribute (path, ''insdirectory'');
- C. BasicFileAttributes attributes = Files, readAttributes (path, FileAttributes, class);
- D. BasicFileAttributes attributes = Files.readAttributes(path, BasicFileAttributes.class
Answer: C
NEW QUESTION 133
Given:
Which would cause s to be AQCD?
- A. s.replace(s.indexOf("B"), s.indexOf("B"), "Q");
- B. s.replace(s.indexOf("B"), s.indexOf("C"), "Q");
- C. s.replace(s.indexOf("A"), s.indexOf("C"), "Q");
- D. s.replace(s.indexOf("A"), s.indexOf("B"), "Q");
Answer: B
NEW QUESTION 134
Given:
What is known about the Sportscar class?
- A. The Sportscar class is a superclass that has more functionality than the Automobile class.
- B. The Sportscar class is a subclass of Automobile and inherits its methods.
- C. The Sportscar subclass cannot override setTurbo method from the superclass Automobile.
- D. The Sportscar class inherits the setTurbo method from the superclass Automobile.
Answer: B
NEW QUESTION 135
Given the code fragment:
What is the result?
- A. false false true
- B. false true false
- C. false true true
- D. true false false
Answer: B
Explanation:
NEW QUESTION 136
Given:
and
Which code fragment on line 1 makes the s1 set contain the names of all employees born before January 1,
1989?
- A. Option B
- B. Option D
- C. Option C
- D. Option A
Answer: A
NEW QUESTION 137
Given:
Which two lines can replace line 1 so that the Y class compiles? (Choose two.)
- A. set(map)
- B. super.set(List<String> map)
- C. map.forEach((k, v) -> set(v)));
- D. super.set(map.values());
- E. set(map.values());
Answer: D,E
NEW QUESTION 138
Given:
Which two method implementations are correct, when inserted independently in line 1? (Choose two.)
- A. Option E
- B. Option D
- C. Option C
- D. Option B
- E. Option A
Answer: A,E
NEW QUESTION 139
Given the code fragment:
public void foo(Function<Integer, String> fun) {...}
Which two compile? (Choose two.)
- A. foo( (int n) -> Integer.toHexString(n) )
- B. foo( Integer::toHexString )
- C. foo( n -> Integer::toHexString )
- D. foo( n -> n + 1 )
- E. foo( n::toHexString )
- F. foo( n -> Integer.toHexString(n) )
- G. foo( int n -> Integer.toHexString(n) )
- H. foo( toHexString )
Answer: D,F
Explanation:
Explanation/Reference:
NEW QUESTION 140
Given:
/code/a/Test.java
containing:
and
/code/b/Best.java
containing:
package b;
public class Best { }
Which is the valid way to generate bytecode for all classes?
- A. javac -d /code /code/a/Test.java
- B. java /code/a/Test.java /code/b/Best.java
- C. javac -d /code /code/a/Test.java /code/b/Best.java
- D. javac -d /code /code/a/Test
- E. java /code/a/Test.java
- F. java -cp /code a.Test
Answer: C
NEW QUESTION 141
Given the code fragment:
What is the result?
- A. ab cd ef
- B. abc def
- C. An ArrayIndexOutOfBoundsException is thrown at runtime.
- D. ad be cf
- E. The compilation fails.
Answer: D
NEW QUESTION 142
Given:
What is the result?
- A. The program prints nothing.
- B. Orange Juice Apple Pie Lemmon Ice Raspberry Tart
- C. The compilation fails.
- D. Orange Juice
Answer: B
Explanation:
NEW QUESTION 143
Given:
Which two are secure serialization of these objects? (Choose two.)
- A. Define the serialPersistentFields array field.
- B. Make the class abstract.
- C. Implement only writeReplace to replace the instance with a serial proxy and not readResolve.
- D. Declare fields transient.
- E. Implement only readResolve to replace the instance with a serial proxy and not writeReplace.
Answer: A,E
NEW QUESTION 144
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