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1Z0-819 Dumps Questions Study Exam Guide
Oracle 1Z0-819 (Java SE 11 Developer) Exam is a certification exam designed for Java developers who want to validate their skills and knowledge in Java programming language. 1Z0-819 exam is ideal for developers who have experience in Java SE 11 and are looking to enhance their skills and become certified in the latest version. 1Z0-819 exam covers a wide range of topics such as Java data types, flow control, classes and objects, inheritance, exception handling, and more.
Oracle 1z1-819 exam consists of 60 multiple-choice questions and has a time limit of 150 minutes. 1Z0-819 exam is available in English and Japanese and can be taken either in-person or online. To pass the exam, you need to score at least 63% or higher. If you fail the exam, you can retake it after a waiting period of 14 days.
NEW QUESTION # 129
Given:
What is the result?
- A. At once 0
- B. At once 1
- C. An indexOutofBoundsException is thrown at runtime.
- D. Hat at store 4
- E. Hat at store 1
Answer: E
NEW QUESTION # 130
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. var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
- C. Stream<String> lines = Files.lines(INPUT_FILE_NAME);
- D. Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
Answer: B
NEW QUESTION # 131
Given the code fragment:
var pool = Executors.newFixedThreadPool(5);
Future outcome = pool.submit(() > 1);
Which type of lambda expression is passed into submit()?
- A. java.util.concurrent.Callable
- B. java.lang.Runnable
- C. java.util.function.Function
- D. java.util.function.Predicate
Answer: A
NEW QUESTION # 132
Which module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI module?
- A. module PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi;
} - B. module PrintServiceProvider {
requires PrintServiceAPI;
uses com.provider.PrintService;
} - C. module PrintServiceProvider {
requires PrintServiceAPI;
exports org.printservice.spi.Print with
D18912E1457D5D1DDCBD40AB3BF70D5D
com.provider.PrintService;
} - D. module PrintServiceProvider {
requires PrintServiceAPI;
provides org.printservice.spi.Print with
com.provider.PrintService;
}
Answer: A
NEW QUESTION # 133
Given:
Which two methods modify field values? (Choose two.)
- A. setACount
- B. setCCount
- C. setTCount
- D. setAllCounts
- E. setGCount
Answer: D,E
NEW QUESTION # 134
Which code fragment represents a valid Comparatorimplementation?
- A.
- B.
- C.
- D.
Answer: B
NEW QUESTION # 135
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. var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
- C. Stream<String> lines = Files.lines(INPUT_FILE_NAME);
- D. Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
Answer: B
NEW QUESTION # 136
Given:
Which loop incurs a compile time error?
- A. the loop starting line 14
- B. the loop starting line 7
- C. the loop starting line 11
- D. the loop starting line 3
Answer: A
NEW QUESTION # 137
Given:
When run and all three files exist, what is the state of each reader on Line 1?
- A. All three readers have been closed.
- B. Only reader1 has been closed.
- C. The compilation fails.
- D. All three readers are still open.
Answer: C
NEW QUESTION # 138
Given:
What is the result?
A)
B)
C)
D)
- A. Option C
- B. Option A
- C. Option D
- D. Option B
Answer: B
NEW QUESTION # 139
Given:
executed with this command:
java Main one two three
What is the result?
- A. 0). one1). two2). three
- B. A java.lang.NullPointerException is thrown.
- C. It creates an infinite loop printing:0). one1). two1). two...
- D. The compilation fails.
- E. 0). one
Answer: C
NEW QUESTION # 140
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 # 141
Given:
What is the output?
- A. Bonjour le monde!Bonjour le monde!
- B. Bonjour le monde!Hello world!
- C. Hello world!Hello world!
- D. Hello world!Bonjour le monde!
Answer: B
Explanation:
NEW QUESTION # 142
Given:
What is the result?
- A. NullPointerException is thrown at line 4.
- B. A compilation error occurs.
- C. Hello
- D. NullPointerException is thrown at line 10.
Answer: C
Explanation:
NEW QUESTION # 143
Given:
Which loop incurs a compile time error?
- A. the loop starting line 14
- B. the loop starting line 7
- C. the loop starting line 11
- D. the loop starting line 3
Answer: A
NEW QUESTION # 144
Given:
var data = new ArrayList<>();
data.add("Peter");
data.add(30);
data.add("Market Road");
data.set(1, 25);
data.remove(2);
data.set(3, 1000L);
System.out.print(data);
What is the output?
- A. [Market Road, 1000]
- B. An exception is thrown at run time.
- C. [Peter, 30, Market Road]
- D. [Peter, 25, null, 1000]
Answer: B
Explanation:
NEW QUESTION # 145
Given:
Which two methods facilitate valid ways to read instance fields? (Choose two.)
- A. getACount
- B. getGCount
- C. getTCount
- D. getCCount
- E. getTotalCount
Answer: D,E
NEW QUESTION # 146
Given:
What is the result?
- A. null
Mary - B. Joe
Marry - C. null
null - D. Joe
null
Answer: D
Explanation:
Explanation
Graphical user interface, application Description automatically generated
NEW QUESTION # 147
Which code fragment prints 100 random numbers?
- A. Option C
- B. Option B
- C. Option D
- D. Option A
Answer: C
NEW QUESTION # 148
Given:
Which two interfaces can be used in lambda expressions? (Choose two.)
- A. MyInterface3
- B. MyInterface1
- C. MyInterface5
- D. MyInterface2
- E. MyInterface4
Answer: A,D
NEW QUESTION # 149
Given:
Which two lines inserted in line 1 will allow this code to compile? (Choose two.)
- A. protected void walk(){}
- B. abstract void walk();
- C. void walk(){}
- D. private void walk(){}
- E. public abstract void walk();
Answer: A,E
NEW QUESTION # 150
......
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