Get 100% Passing Success With True 1z1-819 Exam! [Apr-2023]
Oracle 1z1-819 PDF Questions - Exceptional Practice To Java SE 11 Developer
The exam consists of 80 questions and has a time limit of 180 minutes. The passing score for the exam is 63%, and candidates can retake the exam if they do not pass on their first attempt. Oracle also offers study materials, including official training courses and practice exams, to help candidates prepare for the exam.
NEW QUESTION # 63
Given:
What is the output?
- A. 1 2 [1, 2, 3, 4] 3 4
- B. 1 2 [1, 2, 3, four] 3 four
- C. 1 2 [1, 2, 3, four] 3 4
- D. 1 2 [1, 2, 3, 4] 3 four
Answer: A
NEW QUESTION # 64
Given:
You want to implement the java.io.Serializable interface to the MyPersistenceData class.
Which method should be overridden?
- A. nothing
- B. the readExternal method
- C. the readExternal and writeExternal method
- D. the writeExternal method
Answer: C
NEW QUESTION # 65
Given the declaration:
Examine this code fragment:
/* Loc1 */ class ProcessOrders { ... }
Which two annotations may be applied at Loc1 in the code fragment? (Choose two.)
- A. @Resource(name="Customer1")
- B. @Resource(priority=100)
- C. @Resource
- D. @Resource(name="Customer1", priority=100)
- E. @Resource(priority=0)
Answer: B,E
NEW QUESTION # 66
Given:
This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?
- A. Consumer consumer = System.out::print;
- B. Consumer consumer = msg -> { return System.out.print(msg); };
- C. Consumer consumer = (String args) > System.out.print(args);
- D. Consumer consumer = var arg > {System.out.print(arg);};
Answer: A
Explanation:
NEW QUESTION # 67
Given:
What is the result?
- A. The compilation fails.
- B. adf
- C. abd
- D. abcd
- E. abdf
Answer: D
NEW QUESTION # 68
Given:
What is the result?
- A. 0-6
- B. 0-6
2-4 - C. The compilation fails due to an error in line 1.
- D. 1-5
2-4 - E. 0-6
1-5
2-4 - F. 1-5
- G. 2-4
Answer: F
Explanation:
Explanation
Graphical user interface, text, application Description automatically generated
NEW QUESTION # 69
Given:
It is required that if p instanceof Pair then p.isValid() returns true.
Which is the smallest set of visibility changes to insure this requirement is met?
- A. setLeft and setRight must be protected.
- B. isValid must be public.
- C. left and right must be private.
- D. left, right, setLeft, and setRight must be private.
Answer: C
NEW QUESTION # 70
Which two are functional interfaces? (Choose two.)
- A. Option A
- B. Option E
- C. Option B
- D. Option D
- E. Option C
Answer: B,E
NEW QUESTION # 71
Given:
You want to obtain the Stream object on reading the file. Which code inserted on line 1 will accomplish this?
- A. Stream<String> lines = Files.lines(INPUT_FILE_NAME);
- B. var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
- C. var lines = Files.lines(Paths.get(INPUT_FILE_NAME));
- D. Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
Answer: B
NEW QUESTION # 72
Given:
What code must you insert on Line 1 to enable the code to print Hello world?
- A. Hello myH = new Hello();
Hello.Greeting myG = myH.new Hello.Greeting();
myG.sayHi(); - B. Hello.Greeting myG = new Hello.Greeting() myG.sayHi();
- C. Hello myH = new Hello();
Hello.Greeting myG = myH.new Greeting();
myG.sayHi(); - D. Hello myH = new Hello(); Greeting myG = new Greeting(); myG.sayHi ();
Answer: C
NEW QUESTION # 73
Given:
Automobile.java
Car.java
What must you do so that the code prints 4?
- A. Replace the code in line 2 with Car ob = new Car();
- B. Remove abstract keyword in line 1.
- C. Remove the parameter from wheels method in line 3.
- D. Add @Override annotation in line 2.
Answer: D
Explanation:
NEW QUESTION # 74
Your organization makes mlib.jar available to your cloud customers. While working on a new feature for mlib.jar, you see that the customer visible method public void enableService(String hostName, String portNumber) executes this code fragment
and you see this grant is in the security policy file:
What security vulnerability does this expose to your cloud customer's code?
- A. SQL injection attack against the specified host and port
- B. denial of service attack against any reachable machine
- C. none because the customer code base must also be granted SocketPermission
- D. XML injection attack against any mlib server
- E. privilege escalation attack against the OS running the customer code
Answer: A
NEW QUESTION # 75
Given:
What is the result?
- A. 6104 3
- B. 0
- C. 10126 3
- D. 6910 3
Answer: A
Explanation:
NEW QUESTION # 76
Given:
And the command:
java Main Helloworld
What is the result ?
- A. Input:
Then block until any input comes from System.in. - B. A NullPointerException is thrown at run time.
- C. Input: Echo:
- D. Input: Helloworld Echo: Helloworld
- E. Input:
Echo: Helloworld
Answer: A
Explanation:
NEW QUESTION # 77
Given:
What is the output?
- A. I am an object array
- B. I am an array
- C. The compilation fails due to an error in line 1.
- D. I am an object
Answer: D
NEW QUESTION # 78
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. fruits.stream().filter(f -> f.contains("n")).forEachOrdered(System.out::print);
- B. Optional<String> result = fruits.stream().filter(f -> f.contains ("n")).findFirst ();
- C. String result = fruits.stream().filter(f -> f.contains("n")).findAny();
- D. Optional<String> result = fruits.stream().anyMatch(f -> f.contains("n"));
Answer: A
Explanation:
NEW QUESTION # 79
Which code fragment prints 100 random numbers?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer: D
NEW QUESTION # 80
Given:
Which two lines cause compilation errors? (Choose two.)
- A. line 8
- B. line 9
- C. line 12
- D. line 7
- E. line 6
Answer: D,E
NEW QUESTION # 81
Given:
What is the result?
- A. 5 4 3 2 1 4 3 2 1 3 2 1 2 1 1
- B. nothing
- C. 0
- D. 5 4 3 2 1
Answer: B
Explanation:
Explanation
Graphical user interface, application Description automatically generated
NEW QUESTION # 82
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
Answer: A
NEW QUESTION # 83
Given the code fragment:
What is the result?
- A. 3 : 0
- B. -1 : 2
- C. 2 : 3
- D. 2 : -1
Answer: D
NEW QUESTION # 84
Given:
What is the result?
- A. Tuesday
- B. WorkingUnknown
- C. Working
- D. Unknown
- E. The compilation fails.
- F. TuesdayUnknown
Answer: D
Explanation:
NEW QUESTION # 85
......
The 1Z0-819 exam covers a wide range of Java SE 11 topics, including Java classes, interfaces, and objects, Java data types, Java collections, Java streams, Java IO and NIO, Java concurrency, Java annotations, Java generics, and Java exceptions. The exam also covers Java development tools, such as Java Development Kit (JDK), Java Integrated Development Environment (IDE), and Java Virtual Machine (JVM).
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