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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 exam dumps:

Define and use fields and methods, including instance, static and overloaded methods
Create, apply, and process annotations
Declare and instantiate Java objects including nested class objects, and explain objects' lifecycles (including creation, dereferencing by reassignment, and garbage collection)
Connect to and perform database SQL operations, process query results using JDBC APIAnnotations
Deploy and execute modular applications, including automatic modules
Declare, use, and expose modules, including the use of services
Create and use subclasses and superclasses, including abstract classes
Read and write console and file data using I/O Streams
Understand variable scopes, apply encapsulation and make objects immutable
Create and use interfaces, identify functional interfaces, and utilize private, static, and default methods
Implement serialization and deserialization techniques on Java objects

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The Oracle 1z1-819 (Java SE 11 Developer) Certification Exam is designed to test the skills and knowledge of Java developers. This certification is meant for those who have experience in Java programming and want to showcase their skills to potential employers. By passing this exam, candidates can demonstrate their proficiency in Java SE 11 and earn a valuable credential that can enhance their career prospects.

Oracle Java SE 11 Developer Sample Questions (Q144-Q149):

NEW QUESTION # 144
Given:

Which statement on line 1 enables this code to compile?

A. Function<Integer> f = n > n * 2;
B. Function f = n > n * 2;
C. Function<Integer, Integer> f = n > n * 2;
D. Function<int, int> f = n > n * 2;
E. Function<int> f = n > n * 2;

Answer: C

Explanation:

NEW QUESTION # 145
Examine this excerpt from the declaration of the java.se module:

What does the transitive modifier mean?

A. Only a module that requires the java.se module is permitted to require the java.sql module.
B. Any module that requires the java.se module does not need to require the java.sql module.
C. Any module that requires the java.sql module does not need to require the java.se module.
D. Any module that attempts to require the java.se module actually requires the java.sql module instead.

Answer: A

NEW QUESTION # 146
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. fruits.stream().filter(f > f.contains("n")).forEachOrdered(System.out::print);
C. String result = fruits.stream().filter(f > f.contains("n")).findAny();
D. Optional<String> result = fruits.stream().filter(f > f.contains ("n")).findFirst ();

Answer: B

Explanation:

NEW QUESTION # 147
Which two are functional interfaces? (Choose two.)

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

Answer: C,D

NEW QUESTION # 148
Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

A. To compile without an error, the application must have at least one module in the module source path that provides an implementation of country.CountryDetails.
B. A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.
C. An implementation of country.countryDetails can be added to the main module.
D. To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.
E. A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.

Answer: A,E

Explanation:
Reference:
/java-9-error-not-in-a-module-on-the-module-source- path

NEW QUESTION # 149
......

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