Pass Guaranteed Quiz 2023 Realistic Verified Free 1Z0-819 Exam Dumps
Free Oracle Java SE 1Z0-819 Ultimate Study Guide (Updated 262 Questions)
Oracle 1Z0-819 is a certification exam designed for Java developers who want to validate their expertise in Java SE 11. 1Z0-819 exam covers a wide range of topics, including Java fundamentals, object-oriented programming concepts, functional programming, JDBC, and more. Passing the 1Z0-819 exam is a prerequisite for earning the Oracle Certified Professional: Java SE 11 Developer certification.
Exam Topic for Java SE 11 Developer Exam Number: 1Z0-819
The following will be discussed in ORACLE 1Z0-006 exam dumps:
- Annotations
- Working with Java data types
- Java Object-Oriented Approach
- Java Platform Module System
NEW QUESTION # 17
Given:
executed using command:
java Hello "Hello World" Hello World
What is the output?
- A. An exception is thrown at runtime.
- B. Hello WorldHello World
- C. Hello World Hello World
- D. Hello WorldHelloWorld
- E. HelloHello WorldHelloWorld
Answer: C
NEW QUESTION # 18
Given:
String originalPath = "data\\projects\\a-project\\..\\..\\another-project"; Path path = Paths.get(originalPath); System.out.print(path.normalize()); What is the result?
- A. data\another-project
- B. data\projects\a-project\another-project
- C. data\\projects\\a-project\\..\\..\\another-project
- D. data\projects\a-project\..\..\another-project
Answer: D
Explanation:
NEW QUESTION # 19
Given the code fragment:
What is the result?
- A. false true false
- B. false false true
- C. false true true
- D. true false false
Answer: A
Explanation:
NEW QUESTION # 20
Given:
You wants to make the reduction operation parallelized.
Which two modifications will accomplish this?
- A. Replace line 1with int sum = number.stream. parallel ( ). Reduce (0, (n, m) -> n + m);
- B. Replace line 1 with int sum = numbers. Stream (). Interate (0, a -> a+1. Reduce (0, (n m) -> n+m);
- C. Replace line 1 with int sum = numbers. Parallel ( ). Stream ( ). Reduce (0, (n, m ) -> n + m);
- D. Replace line 1with int sum = numbers. ParallelStream ( ). Reduce (0, (n, m ) -> n + m);
- E. Replace line 1with int sum = number. Stream ( ) . flatMap (a -> a) .reduce (0, (n, m) -> n +m );
Answer: B,E
NEW QUESTION # 21
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
Answer: D
NEW QUESTION # 22
A company has an existing sales application using a Java 8 jar file containing packages:
com.company.customer;
com.company.customer.orders;
com.company.customer.info;
com.company.sales;
com.company.sales.leads;
com.company.sales.closed;
com.company.orders;
com.company.orders.pending;
com.company.orders.shipped.
To modularize this jar file into three modules, customer, sales, and orders, which module-info.java would be correct?
A)
B)
C)
D)
- A. Option C
- B. Option A
- C. Option D
- D. Option B
Answer: A
NEW QUESTION # 23 
What change will cause the code to compile successfully?
- A. Insert PriceChecker <Electronics> prod on line 1.
- B. Insert PriceChecker <> prod on line 1.
- C. Insert PriceChecker <Plushy extends Products> prod on line 1.
- D. Insert PriceChecker (?) prod on line 1.
Answer: D
NEW QUESTION # 24
Given the code fragment:
You must make the countvariable thread safe.
Which two modifications meet your requirement? (Choose two.)
- A. replace line 2 with public static synchronized void main(String[] args) {
- B. replace line 3 with
synchronized(test.count) {
test.count++;
} - C. replace line 1 with private volatile int count = 0;
- D. replace line 3 with
synchronized(test) {
test.count++;
} - E. replace line 1 with private AtomicInteger count = new AtomicInteger(0);and replace line 3 with test.count.incrementAndGet();
Answer: B,E
Explanation:
Explanation/Reference: https://stackoverflow.com/questions/15852123/java-thread-safe-counter/15852164
NEW QUESTION # 25
Given:
What is the result?
- A. java.lang.ArrayIndexOutOfBoundsException thrown
- B. [0,0] = Red[1,0] = Black[2,0] = Blue
- C. [0,0] = Red[0,1] = White[1,0] = Black[2,0] = Blue[2,1] = Yellow[2,2] = Green[2,3] = Violet
- D. [0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet
Answer: C
Explanation:
NEW QUESTION # 26
Given:
What is the result?
- A. 0
- B. The compilation fails due to an error in line 4.
- C. 1
- D. The compilation fails due to an error in line 2.
- E. The compilation fails due to an error in line 3.
- F. The compilation fails due to an error in line 1.
- G. The compilation fails due to an error in line 5.
Answer: C
NEW QUESTION # 27
Given:
List<String> list1 = new ArrayList<>();
list1.add("A");
list1.add("B");
List list2 = List.copyOf(list1);
list2.add("C");
List<List<String>> list3 = List.of(list1, list2);
System.out.println(list3);
What is the result?
- A. [[A, B],[A, B]]
- B. [[A, B], [A, B, C]]
- C. [[A, B, C], [A, B, C]]
- D. An exception is thrown at run time.
Answer: D
Explanation:
NEW QUESTION # 28
Given:
Which two statements are true if the method is added to Bar? (Choose two.)
- A. public <T> Collection<T> foo(Stream<T> arg) { ... } overloads Foo.foo.
- B. public <T> Iterable<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
- C. public <T> Collection<T> bar(Collection<T> arg) { ... } overloads Foo.foo.
- D. public <T> List<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
- E. public <T> Collection<T> foo(Collection<T> arg) { ... } overloads Foo.foo.
- F. public Collection<String> foo(Collection<String> arg) { ... } overrides Foo.foo.
Answer: B,D
NEW QUESTION # 29
Given:
Which two lines cause compilation errors? (Choose two.)
- A. line 9
- B. line 7
- C. line 12
- D. line 8
- E. line 6
Answer: B,E
NEW QUESTION # 30
Given:
What is the result?
- A. 0
- B. The compilation fails due to an error in line 4.
- C. 1
- D. The compilation fails due to an error in line 2.
- E. The compilation fails due to an error in line 3.
- F. The compilation fails due to an error in line 1.
- G. The compilation fails due to an error in line 5.
Answer: C
NEW QUESTION # 31
Given the code fragment:
Which statement at line 1 will print Ping Pong?
- A.
- B.
- C.
- D.
Answer: C
NEW QUESTION # 32
Given:
A) An exception is thrown at run time.
B)
C) The compilation fails due to an error on line 2.
D) The compilation fails due to an error on line 1.
E)
F)
The compilation fails due to an error on line 3.
- A. Option D
- B. Option B
- C. Option A
- D. Option F
- E. Option C
- F. Option E
Answer: C
NEW QUESTION # 33
Given:
Which two lines inserted in line 1 will allow this code to compile? (Choose two.)
- A. abstract void walk();
- B. void walk(){}
- C. private void walk(){}
- D. protected void walk(){}
- E. public abstract void walk();
Answer: D,E
NEW QUESTION # 34
Given the code fragment:
What is the result?
- A. false true false
- B. false false true
- C. false true true
- D. true false false
Answer: A
Explanation:
NEW QUESTION # 35
Given:
Which two statements can be added at line 1 in Bar to successfully compile it? (Choose two.)
- A. public List<Integer> foo(Set<CharSequence> m) { ... }
- B. public List<Integer> foo(Set<String> m) { ... }
- C. public List<Integer> foo(TreeSet<String> m) { ... }
- D. public ArrayList<Number> foo(Set<CharSequence> m) { ... }
- E. public List<Object> foo(Set<CharSequence> m) { ... }
- F. public ArrayList<Integer> foo(Set<String> m) { ... }
Answer: C,D
NEW QUESTION # 36
Given:
Which two lines inserted in line 1 will allow this code to compile? (Choose two.)
- A. abstract void walk();
- B. void walk(){}
- C. private void walk(){}
- D. protected void walk(){}
- E. public abstract void walk();
Answer: D,E
NEW QUESTION # 37
Given this enum declaration:
Examine this code:
System.out.println(Alphabet.getFirstLetter());
What code should be written at line 3 to make this code print A?
- A. static String getFirstLetter() { return Alphabet.values()[1].toString(); }
- B. final String getFirstLetter() { return A.toString(); }
- C. String getFirstLetter() { return A.toString(); }
- D. static String getFirstLetter() { return A.toString(); }
Answer: D
NEW QUESTION # 38
Given:
This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?
- A. Consumer consumer = msg -> { return System.out.print(msg); };
- B. Consumer consumer = System.out::print;
- C. Consumer consumer = var arg > {System.out.print(arg);};
- D. Consumer consumer = (String args) > System.out.print(args);
Answer: B
Explanation:
NEW QUESTION # 39
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Oracle 1Z0-819 exam is a challenging exam that requires a thorough understanding of Java programming concepts and techniques. Candidates who pass 1Z0-819 exam can demonstrate their expertise in Java SE 11 and open up new career opportunities in the field of Java development. To succeed in 1Z0-819 exam, candidates should have a strong work ethic, a dedication to learning, and a passion for programming. With the right preparation and mindset, candidates can pass 1Z0-819 exam and become certified Java SE 11 developers.
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