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The Oracle 1Z0-819 exam is intended for developers who have a strong foundation in Java programming and have experience with Java SE 11. It is suitable for developers who want to demonstrate their ability to build applications in Java, including desktop, web, and mobile applications.
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NEW QUESTION # 89
Given:
Which two statements are valid to be written in this interface? (Choose two.)
- A. public String methodD();
- B. public int x;
- C. public void methodF(){System.out.println("F");}
- D. final void methodE();
- E. private abstract void methodC();
- F. public abstract void methodB();
- G. final void methodG(){System.out.println("G");}
Answer: A,F
NEW QUESTION # 90
Given the code fragment:
What is the result?
- A. False
- B. A java.lang.NullPointerException is thrown.
- C. True
- D. A java.lang, UnsupportedOperationException is thrown.
Answer: D
NEW QUESTION # 91
Given:
You want to obtain the Filechannel object on line 1.
Which code fragment will accomplish this?
- A.
- B.
- C.
- D.
Answer: D
NEW QUESTION # 92
Given the code fragment:
Path currentFile = Paths.get("/scratch/exam/temp.txt");
Path outputFile = Paths get("/scratch/exam/new.txt");
Path directory = Paths.get("/scratch/");
Files.copy(currentFile, outputFile);
Files.copy(outputFile, directory);
Files.delete (outputFile);
The /scratch/exam/temp.txt file exists. The /scratch/exam/new.txt and /scratch/new.txt files do not exist.
What is the result?
- A. The program throws a FileaAlreadyExistsException.
- B. /scratch/exam/new.txt and /scratch/new.txt are deleted.
- C. A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.
- D. The program throws a NoSuchFileException.
Answer: D
Explanation:
NEW QUESTION # 93
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
- E. The compilation fails.
Answer: D
NEW QUESTION # 94
Which two statements are correct about modules in Java? (Choose two.)
- A. module-info.java cannot be empty.
- B. By default, modules can access each other as long as they run in the same folder.
- C. A module must be declared in module-info.java file.
- D. java.base exports all of the Java platforms core packages.
- E. module-info.java can be placed in any folder inside module-path.
Answer: C,D
NEW QUESTION # 95
Which code fragment added to line 1 enables the code to compile and print Hello Joe?
- A.
- B.
- C.
- D.
Answer: A
NEW QUESTION # 96
Given:
What is the result?
- A. 42=(x+y)=42
- B. 42=(x+y)=6
- C. 6=(x+y)=42
- D. 6=(x+y)=6
- E. An exception is thrown at runtime.
Answer: C
Explanation:
NEW QUESTION # 97
Given:
What is the result?
- A. The program prints nothing.
- B. Orange Juice
- C. The compilation fails.
- D. Orange Juice Apple Pie Lemmon Ice Raspberry Tart
Answer: D
Explanation:
NEW QUESTION # 98
Given:
Which statement is true about the Fox class?
- A. Fox class must provide implementation for the inhabit method.
- B. The inhabit method implementation from the first interface that Fox implements will take precedence.
- C. Fox class does not have to override inhabit method, so long as it does not try to call it.
- D. Fox class must implement either Forest or Town interfaces, but not both.
- E. Fox class does not have to override the inhabit method if Forest and Town provide compatible implementations.
Answer: E
NEW QUESTION # 99
Given:
Which two codes, independently, can be inserted in line to 1 compile?
- A. Abacus aba = (int e, int f) -> { return e * f; };
- B. Abacus aba = (a, b) -> a * b;
- C. Abacus aba = (int i, j) -> ( return i * j; };
- D. Abacus aba = v, w -> x * y;
- E. Abacus aba = (int m, int n) -> { m * n };
Answer: B,C
NEW QUESTION # 100
Given these two classes:
And given this fragment:
Which describes the fragment?
- A. It throws IllegalMonitorStateException.
- B. It is subject to livelock.
- C. It is subject to deadlock.
- D. The code does not compile.
Answer: D
NEW QUESTION # 101
Which two statements independently compile? (Choose two.)
- A. List<? super Float> list = new ArrayList<Double>();
- B. List<? extends Number> list = new ArrayList<Byte>();
- C. List<? super Short> list = new ArrayList<Number>();
- D. List<? extends Number> list = new ArrayList<Object>();
- E. List<? super Number> list = new ArrayList<Integer>();
Answer: B,C
Explanation:
NEW QUESTION # 102
Given:
and
What is the result?
- A. A ClassCastException is thrown at run time.
- B. A NullPointerException is thrown at run time.
- C. The compilation fails.
- D. 1
1
1 - E. 1
Null
null
Answer: C
Explanation:
NEW QUESTION # 103
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 A
- B. Option B
- C. Option C
- D. Option D
Answer: C
NEW QUESTION # 104
Given the code fragment:
What is the output?
- A. [-3, -2, -1]
- B. [-1, -2, -3]
- C. The compilation fails.
- D. A runtime exception is thrown.
Answer: D
NEW QUESTION # 105
Given:
Assume the file on path does not exist. What is the result?
- A. The compilation fails.
- B. /u01/work/filestore.txt is deleted.
- C. Exception
- D. /u01/work/filestore.txt is not deleted.
Answer: A
Explanation:
NEW QUESTION # 106
Given:
What is the result?
- A. null
- B. The compilation fails due to an error in line 1.
- C. p1
- D. Joe Bloggs
Answer: B
Explanation:
NEW QUESTION # 107
Give:
And the code fragment:
Which three code fragments, at line n1 prints SPRING?
- A. System.out.printin(Season,values(1)};
- B. System.out.printin (sa(0)}:
- C. System.out.printin (Season.valueof ('s') );
- D. System.out.printin(Season.SPRING);
- E. System.out.printin (Season.valueof(''SPRING").ordinal() );
- F. System.out.printin(Season.valueOf(''SPRING"). Ordinal() );
- G. System.out.printin (sA(1)};
Answer: D,E,G
NEW QUESTION # 108
Given:
What is the result?
- A. 5 4 3 2 1 4 3 2 1 3 2 1 2 1 1
- B. nothing
- C. 5 4 3 2 1
- D. 0
Answer: B
Explanation:
NEW QUESTION # 109
......
Oracle 1Z0-819 certification exam is designed for Java developers who want to validate their knowledge and skills in Java SE 11. Java SE 11 Developer certification exam is the replacement for the previous Java SE 11 Programmer II exam (1Z0-816) and covers a wide range of topics related to Java programming.
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