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Oracle 1z0-809 (Java SE 8 Programmer II) exam is designed for experienced Java developers who want to validate their skills and knowledge in Java programming. It is a professional-level certification that demonstrates your advanced knowledge of Java SE 8 programming language. 1z1-809 Exam covers a wide range of topics related to Java programming, including advanced Java concepts, concurrency, IO, and security.

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Oracle Java SE 8 Programmer II Sample Questions (Q39-Q44):

NEW QUESTION # 39
Given the code fragment:
Map<Integer, String> books = new TreeMap<>();
books.put (1007, "A");
books.put (1002, "C");
books.put (1003, "B");
books.put (1003, "B");
System.out.println (books);
What is the result?

A. {1007=A, 1003=B, 1003=B, 1002=C}
B. {1007=A, 1003=B, 1002=C}
C. {1002=C, 1003=B, 1007=A}
D. {1007=A, 1002=C, 1003=B, 1003=B}

Answer: C

NEW QUESTION # 40
Given the code fragment:

What is the result?

A. Compilation fails only at line n2.
B. Compilation fails at both line n1 and line n2.
C. Jesse 25
Walter 52
D. Compilation fails only at line n1.

Answer: B

NEW QUESTION # 41
Which two methods from the java.util.stream.Stream interface perform a reduction operation? (Choose two.)

A. filter ()
B. distinct ()
C. peek ()
D. count ()
E. collect ()

Answer: D,E

Explanation:
References:

NEW QUESTION # 42
Given:
public class Counter {
public static void main (String[ ] args) {
int a = 10;
int b = -1;
assert (b >=1) : "Invalid Denominator";
int = a / b;
System.out.println (c);
}
}
What is the result of running the code with the -da option?

A. 0
B. A compilation error occurs.
C. An AssertionError is thrown.
D. 1

Answer: D

NEW QUESTION # 43
Given the following array:

Which two code fragments, independently, print each element in this array?

A. Option C
B. Option A
C. Option E
D. Option D
E. Option F
F. Option B

Answer: B,C

NEW QUESTION # 44
......

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