Latest [Oct 28, 2021] Oracle 1Z0-819 Exam Practice Test To Gain Brilliante Result [Q67-Q88]

Latest [Oct 28, 2021] Oracle 1Z0-819 Exam Practice Test To Gain Brilliante Result

Take a Leap Forward in Your Career by Earning Oracle 1Z0-819

NEW QUESTION 67
Given:

What is true?

A. This should print the same result each time the program runs.
B. This may not print the same result each time the program runs.
C. The compilation fails.
D. A NoSuchElementExceptionis thrown at run time.

Answer: B

Explanation:

NEW QUESTION 68
Given the code fragment:

What is the result?

A. The compilation fails.
B. abc def
C. ab cd ef
D. ad be cf
E. An ArrayIndexOutOfBoundsException is thrown at runtime.

Answer: D

NEW QUESTION 69
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. /scratch/exam/new.txt and /scratch/new.txt are deleted.
B. A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.
C. The program throws a NoSuchFileException.
D. The program throws a FileaAlreadyExistsException.

Answer: C

Explanation:

NEW QUESTION 70
Given:

After which line can we insert assert i < 0 || values[i] <= values[i + 1]; to verify that the values array is partially sorted?

A. after line 10
B. after line 8
C. after line 5
D. after line 6

Answer: D

Explanation:

NEW QUESTION 71
Given:

Which two independent changes will make the Main class compile? (Choose two.)

A. Change line 1 to public class Student {.
B. Change line 1 to static class Student {.
C. Move the entire Student class declaration to a separate Java file, Student.java.
D. Change line 2 to public Student(String classname).
E. Change line 3 to Student student = new Student("Biology");.

Answer: D,E

Explanation:

NEW QUESTION 72
Given:

Which code, when inserted at one or more marked positions, would allow classes B and C to compile?

A. public void z() { } // position 3
B. implements A // position 1@Override // position 2
C. @Override // position 3void x () {} // position 3@Override // position 3public void z() { } // position 3
D. @Override // position 2public void z() { } // position 3

Answer: D

NEW QUESTION 73
Given:

What is the result?

A. this is it 3
B. An IndexOutOfBoundsException is thrown at runtime.
C. is it 1
D. this is it 2
E. is it 0

Answer: D

Explanation:

NEW QUESTION 74
Which two statements independently compile? (Choose two.)

A. List<? extends Number> list = new ArrayList<Object>();
B. List<? extends Number> list = new ArrayList<Byte>();
C. List<? super Float> list = new ArrayList<Double>();
D. List<? super Short> list = new ArrayList<Number>();
E. List<? super Number> list = new ArrayList<Integer>();

Answer: B,D

Explanation:

NEW QUESTION 75
Given:

Which would cause s to be AQCD?

A. s.replace(s.indexOf("B"), s.indexOf("B"), "Q");
B. s.replace(s.indexOf("B"), s.indexOf("C"), "Q");
C. s.replace(s.indexOf("A"), s.indexOf("B"), "Q");
D. s.replace(s.indexOf("A"), s.indexOf("C"), "Q");

Answer: B

NEW QUESTION 76
Which three initialization statements are correct? (Choose three.)

A. boolean true = (4 == 4);
B. byte b = 10;char c = b;
C. int[][] e = {{1,1},{2,2}};
D. int x = 12_34;
E. float x = 1.99;
F. short sh = (short)'A';
G. String contact# = "(+2) (999) (232)";

Answer: C,D,F

NEW QUESTION 77
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, C], [A, B, C]]
B. [[A, B], [A, B, C]]
C. An exception is thrown at run time.
D. [[A, B],[A, B]]

Answer: C

Explanation:

NEW QUESTION 78
Given:

You want to examine the items list it contains an item for which the variable count is below zero.
Which code fragment at line 1 accomplish this?

A. If (items.stream () .anymatch (i -> count < 0) < 0) ) {
B. If (items.stream () .allmatch (i -> count < 0) < 0) ) {
C. If (items.stream () .filter (i -> count < 0) . findAny () ) {
D. If (items.stream () .filter (i -> count < 0) . findFirst () ) {

Answer: D

NEW QUESTION 79
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(priority=100)
B. @Resource(name="Customer1")
C. @Resource(name="Customer1", priority=100)
D. @Resource(priority=0)
E. @Resource

Answer: A,D

NEW QUESTION 80
Which two interfaces are considered to be functional interfaces? (Choose two.)
@FunctionalInterface

A. interface InterfaceD {
int breed(int x);
}
@FunctionalInterface
B. int GERM = 13;
public default int getGERM() { return get(); }
private int get() { return GERM; }
public boolean equals(Object o);
int breed(int x);
}
C. interface InterfaceC {
public boolean equals(Object o);
int breed(int x);
int calculate(int x, int y);
}
@FunctionalInterface
D. int GERM = 13;
public default int getGERM() { return GERM; }
}
interface InterfaceB {
E. interface InterfaceE {
public boolean equals(int i);
int breed(int x);
}
interface InterfaceA {