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Oracle 1z1-819 Exam Syllabus Topics:

Topic	Details
Topic 1	Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting Sort collections and arrays using Comparator and Comparable interfaces
Topic 2	Create and use subclasses and superclasses, including abstract classes Use local variable type inference, including as lambda parameters
Topic 3	Develop code that mitigates security threats such as denial of service Use Java Streams to filter, transform and process data
Topic 4	Secure resource access including filesystems, manage policies and execute privileged code Develop thread-safe code, using different locking mechanisms
Topic 5	Deploy and execute modular applications, including automatic modules Implement functional interfaces using lambda expressions
Topic 6	Create and use interfaces, identify functional interfaces Initialize objects and their members using instance and static initialiser statements and constructors

Understanding functional and technical aspects of Java SE 11 Developer Exam Number: 1Z0-819

The following will be discussed in the ORACLE 1Z0-006 exam dumps:

Handle text using String and StringBuilder classes
Use local variable type inference, including as lambda parameters
Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting

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Oracle Java SE 11 Developer Sample Questions (Q42-Q47):

NEW QUESTION # 42
Given:

Assume the file on path does not exist. What is the result?

A. /u01/work/filestore.txt is not deleted.
B. The compilation fails.
C. Exception
D. /u01/work/filestore.txt is deleted.

Answer: B

Explanation:

NEW QUESTION # 43
Given:

Which is true?

A. The compilation fails due to an error in line 4.
B. The compilation fails due to an error in line 9.
C. The compilation succeeds.
D. The compilation fails due to an error in line 2.
E. The compilation fails due to an error in line 6.
F. The compilation fails due to an error in line 10.
G. The compilation fails due to an error in line 7.

Answer: E

NEW QUESTION # 44
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. Optional<String> result = fruits.stream().anyMatch(f > f.contains("n"));
B. Optional<String> result = fruits.stream().filter(f > f.contains ("n")).findFirst ();
C. fruits.stream().filter(f > f.contains("n")).forEachOrdered(System.out::print);
D. String result = fruits.stream().filter(f > f.contains("n")).findAny();

Answer: C

Explanation:

NEW QUESTION # 45
Given:
public class X {
}
and
public final class Y extends X {
}
What is the result of compiling these two classes?

A. The compilation fails because a final class cannot extend another class.
B. The compilation succeeds.
C. The compilation fails because there is no zero args constructor defined in class X.
D. The compilation fails because either class X or class Y needs to implement the toString() method.

Answer: D

Explanation:

NEW QUESTION # 46
Given this enum declaration:

Examine this code:
System.out.println(Letter.values()[1]);
What code should be written at line 5 for this code to print 200?

A. String toString() { return "200"; }
B. public String toString() { return String.valueOf(ALPHA.v); }
C. public String toString() { return String.valueOf(v); }
D. public String toString() { return String.valueOf(Letter.values()[1]); }

Answer: C

Explanation:

NEW QUESTION # 47
......

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