2021 Realistic Verified 1z1-819 exam dumps Q&As - 1z1-819 Free Update
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Understanding functional and technical aspects of Java SE 11 Developer Exam Number: 1Z0-819
The following will be discussed in the ORACLE 1Z0-006 dumps:
- Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting
- Use local variable type inference, including as lambda parameters
- Handle text using String and StringBuilder classes
For more info read reference:
1Z0-006 Official Certification Site Oracle Cloud Learning Resources
NEW QUESTION 102
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 D
- B. Option A
- C. Option C
- D. Option B
Answer: D
NEW QUESTION 103
Assume ds is a DataSource and the EMP table is defined appropriately.
What does executing this code fragment do?
- A. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', 'HR')
- B. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', NULL)
- C. throws a SQLException
- D. inserts one row (101, 'SMITH', 'HR')
Answer: D
NEW QUESTION 104
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, C], [A, B, C]]
- C. [[A, B], [A, B, C]]
- D. An exception is thrown at run time.
Answer: D
Explanation:
NEW QUESTION 105
Given the code fragment:
Which two code snippets inserted independently inside print method print Mondial: domainmodal?
- A. prefix + getName
- B. Main.prefix + Main.name
- C. prefix + Main, name
- D. Main.prefix + Main.getName()
- E. new Main (} .prefix + new Main().name
- F. prefix + name
Answer: C,E
NEW QUESTION 106
Given:
What must be added in line 1 to compile this class?
- A. catch(IOException e) { }
- B. catch(FileNotFoundException | IndexOutOfBoundsException e) { }
- C. catch(IndexOutOfBoundsException e) { }catch(FileNotFoundException e) { }
- D. catch(FileNotFoundException | IOException e) { }
- E. catch(FileNotFoundException e) { }catch(IndexOutOfBoundsException e) { }
Answer: A
NEW QUESTION 107
Given:
Which code, when inserted at one or more marked positions, would allow classes B and C to compile?
- A. @Override // position 2public void z() { } // position 3
- B. implements A // position 1@Override // position 2
- C. public void z() { } // position 3
- D. @Override // position 3void x () {} // position 3@Override // position 3public void z() { } // position 3
Answer: A
NEW QUESTION 108
Given the code fragment:
Which action enables Computatorclass to compile?
- A. change Line 4 to for (Double n : collection) {
- B. change Line 5 to List<Double> numbers = List.of(5, 4, 6, 3, 7, 2, 8, 1, 9);
- C. change Line 2 to public Double sum ( C collection) {
- D. change Line 1 to add throws NumberFormatException
- E. change Line 3 to Double sum = 0.0;
Answer: C
NEW QUESTION 109
Which statement about access modifiers is correct?
- A. An abstract method can be declared with the private modifier.
- B. A local variable can be declared with the final modifier.
- C. An inner class cannot be declared with the public modifier.
- D. An instance variable can be declared with the static modifier.
- E. An interface can be declared with the protected modifier.
Answer: B
NEW QUESTION 110
Given:
When run and all three files exist, what is the state of each reader on Line 1?
- A. All three readers are still open.
- B. All three readers have been closed.
- C. Only reader1 has been closed.
- D. The compilation fails.
Answer: D
NEW QUESTION 111
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 112
Given:
Which loop incurs a compile time error?
- A. the loop starting line 3
- B. the loop starting line 7
- C. the loop starting line 11
- D. the loop starting line 14
Answer: D
NEW QUESTION 113
Given:
What prevents this code from compiling?
- A. Cylinderrequires an implementation of calculateSurfaceAreawith two parameters.
- B. The calculateSurfaceAreamethod within Cylinder must be declared default.
- C. The calculateSurfaceAreamethod within Rectangle and Ellipserequires a publicaccess modifier.
- D. Cylinderis not properly calling the Rectangle and Ellipseinterfaces' calculateSurfaceArea methods.
Answer: D
NEW QUESTION 114
Given the code fragment:
What is the result?
- A. false true false
- B. true false false
- C. false false true
- D. false true true
Answer: A
Explanation:
NEW QUESTION 115
Given:
What is the result?
- A. 6 13
- B. 0 5
- C. compilation error
- D. 5 12
Answer: C
Explanation:
NEW QUESTION 116
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 117
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
NEW QUESTION 118
Given:
What is the result?
- A. Joenull
- B. nullnull
- C. JoeMarry
- D. nullMary
Answer: D
Explanation:
NEW QUESTION 119
Given:
Which two codes, independently, can be inserted in line to 1 compile?
- A. Abacus aba = (int i, j) -> ( return i * j; };
- B. Abacus aba = (int m, int n) -> { m * n };
- C. Abacus aba = (a, b) -> a * b;
- D. Abacus aba = v, w -> x * y;
- E. Abacus aba = (int e, int f) -> { return e * f; };
Answer: A,C
NEW QUESTION 120
What makes Java dynamic?
- A. The Java compiler uses reflection to test if class methods are supported by resources of a target platform.
- B. The runtime can process machine language sources as well as executables from different language compilers.
- C. At runtime, classes are loaded as needed, and new code modules can be loaded on demand.
- D. The Java compiler preprocesses classes to run on specific target platforms.
Answer: C
NEW QUESTION 121
Given the code fragment:
What change on line 1 will make this code compile?
- A. Add catch (L e).
- B. Add catch (N | L | M e).
- C. Add catch (L |N e).
- D. Add catch (M |L e).
- E. Add catch (L |M N e).
Answer: A
NEW QUESTION 122
A bookstore's sales are represented by a list of Sale objects populated with the name of the customer and the books they purchased.
public class Sale {
private String customer;
private List<Book> items;
// constructor, setters and getters not shown
}
public class Book {
private String name;
private double price;
// constructor, setters and getters not shown
}
Given a list of Sale objects, tList, which code fragment creates a list of total sales for each customer in ascending order?
- A. Option D
- B. Option B
- C. Option A
- D. Option C
Answer: D
NEW QUESTION 123
Given:
executed with this command:
java Main one two three
What is the result?
- A. 0). one
- B. A java.lang.NullPointerException is thrown.
- C. It creates an infinite loop printing:0). one1). two1). two...
- D. The compilation fails.
- E. 0). one1). two2). three
Answer: C
NEW QUESTION 124
Given:
Which two allow a.Main to allocate a new Person? (Choose two.)
- A. In Line 2, add extends Person to the Main classpublic class Main extends Person {and change Line 3 to create a new Main objectPerson person = new Main();
- B. In Line 1, change the access modifier to privateprivate Person() {
- C. In Line 1, remove the access modifierPerson() {
- D. In Line 2, change the access modifier to protectedprotected class Main {
- E. In Line 1, change the access modifier to publicpublic Person() {
Answer: A,E
NEW QUESTION 125
Given:
What is the result?
- A. 0
- B. b1
- C. b2
- D. The compilation fails due to an error in line 1.
- E. 1
- F. b3
- G. 2
Answer: A
Explanation:
NEW QUESTION 126
......
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