Oracle 1Z0-819 Dumps – The Sure Way To Pass Exam [Q139-Q153]

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Oracle 1Z0-819 Dumps – The Sure Way To Pass Exam

1Z0-819 Exam Questions (Updated 2026) 100% Real Question Answers

Oracle 1z1-819 (Java SE 11 Developer) Certification Exam is an important certification for Java developers who want to showcase their skills and knowledge in the industry. Java SE 11 Developer certification is recognized globally and is highly valued by employers in the IT industry. 1Z0-819 exam is designed to test a developer’s ability to design and develop applications using Java SE 11. Candidates who pass the exam can demonstrate their proficiency in Java programming language, which can lead to better job opportunities and higher salaries.

NO.139 Given the Customer table structure:
* ID Number Primary Key
* NAME Text Nullable
Given code fragment:

Which statement inserted on line 14 sets NAME column to a NULL value?

Stmt.setNull(2, java,sql. Types, VARCHAR);

Stmt.setNull(2 string, class);

Stmt.setNull(2, null);

Stmt.setNull(2, java.lang, string);

NO.140 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?

String result = fruits.stream().filter(f -> f.contains(“n”)).findAny();

fruits.stream().filter(f -> f.contains(“n”)).forEachOrdered(System.out::print);

Optional<String> result = fruits.stream().filter(f -> f.contains (“n”)).findFirst ();

Optional<String> result = fruits.stream().anyMatch(f -> f.contains(“n”));

NO.141 Your organization provides a cloud server to your customer to run their Java code. You are reviewing the changes for the next release and you see this change in one of the config files:

Which is correct?

You accept the change because -noverify is necessary for your code to run with the latest version of Java.

You reject the change because -Xms8g -Xmx8g uses too much system memory.

You accept the change because -noverify is a standard option that has been supported since Java 1.0.

You reject the change because -noverify is a critical security risk.

NO.142 Given:
List<String> longlist = List.of(“Hello”,”World”,”Beat”);
List<String> shortlist = new ArrayList<>();
Which code fragment correctly forms a short list of words containing the letter “e”?

Option A

Option B

Option C

Option D

NO.143 Given:

Which one is correct?

An IllegalThreadStateException is thrown at run time.

Three threads are created.

The compilation fails.

Four threads are created.

NO.144 Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.

A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.

An implementation of country.countryDetails can be added to the main module.

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.

To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.

NO.145 Given:

Examine these requirements:
* Eliminate code duplication.
* Keep constant the number of methods other classes may implement from this interface.
Which method can be added to meet these requirements?

Option A

Option B

Option C

Option D

NO.146 Given the Person class with age and name along with getter and setter methods, and this code fragment:

What will be the result?

Aman Tom Peter

Tom Aman Peter

Aman Peter Tom

Tom Peter Aman

NO.147 Given:

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

@Override // position 3void x () {} // position 3@Override // position 3public void z() { } // position 3

@Override // position 2public void z() { } // position 3

implements A // position 1@Override // position 2

public void z() { } // position 3

NO.148 Which three annotation uses are valid? (Choose three.)

Function<String, String> func = (@NonNull x) > x.toUpperCase();

var v = “Hello” + (@Interned) “World”

Function<String, String> func = (var @NonNull x) > x.toUpperCase();

Function<String, String> func = (@NonNull var x) > x.toUpperCase();

var myString = (@NonNull String) str;

var obj = new @Interned MyObject();

NO.149 Given:

What is the output?

null

A NoSuchElementException is thrown at run time.

Duke

A NullPointerException is thrown at run time.

NO.150 Given:

You want to implement the java.io.Serializable interface to the MyPersistenceData class.
Which method should be overridden?

the readExternal method

nothing

the readExternal and writeExternal method

the writeExternal method

NO.151 Given:

Which two lines inserted in line 1 will allow this code to compile? (Choose two.)

protected void walk(){}

void walk(){}

abstract void walk();

private void walk(){}

public abstract void walk();

NO.152 Given:

Which two lines of code when inserted in line 1 correctly modifies instance variables? (Choose two.)

setCCount(c) = cCount;

tCount = tCount;

setGCount(g);

cCount = setCCount(c);

aCount = a;

NO.153 Given:

Which two allow a.Main to allocate a new Person? (Choose two.)

In Line 1, change the access modifier to privateprivate Person() {

In Line 1, change the access modifier to publicpublic Person() {

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();

In Line 2, change the access modifier to protectedprotected class Main {

In Line 1, remove the access modifierPerson() {

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Oracle 1z1-819 exam is a multiple-choice exam that consists of 80 questions. 1Z0-819 exam duration is 180 minutes, and the passing score for the exam is 63%. 1Z0-819 exam is available in English, Japanese, and Simplified Chinese.

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