[Q120-Q138] Pass Oracle 1Z0-819 Exam in First Attempt Guaranteed [May-2023] – IT Certification Exam Questions & Answers

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Pass Oracle 1Z0-819 Exam in First Attempt Guaranteed [May-2023]

Exam Sure Pass Oracle Certification with 1Z0-819 exam questions

Oracle 1Z0-819 Exam Syllabus Topics:

Topic	Details
Topic 1	Understand variable scopes, apply encapsulation and make objects immutable Connect to and perform database SQL operations, process query results using JDBC API
Topic 2	Deploy and execute modular applications, including automatic modules Implement functional interfaces using lambda expressions
Topic 3	Secure resource access including filesystems, manage policies and execute privileged code Develop thread-safe code, using different locking mechanisms
Topic 4	Develop code that mitigates security threats such as denial of service Use Java Streams to filter, transform and process data
Topic 5	Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting Sort collections and arrays using Comparator and Comparable interfaces

QUESTION 120
Given:

Which two changes need to be made to make this class compile? (Choose two.)

Change Line 1 to an abstract class:public abstract class API {

Change Line 2 access modifier to protected:protected void checkValue(Object value)throws IllegalArgumentException;

Change Line 1 to a class:public class API {

Change Line 1 to extend java.lang.AutoCloseable:public interface API extends AutoCloseable {

Change Line 2 to an abstract method:public abstract void checkValue(Object value)throws IllegalArgumentException;

QUESTION 121
Given:

Which statement on line 1 enables this code to compile?

Function<Integer, Integer> f = n -> n * 2;

Function<Integer> f = n -> n * 2;

Function<int> f = n -> n * 2;

Function<int, int> f = n -> n * 2;

Function f = n -> n * 2;

QUESTION 122
Given:

Which two codes, independently, can be inserted in line to 1 compile?

Abacus aba = (int m, int n) -> { m * n };

Abacus aba = (int e, int f) -> { return e * f; };

Abacus aba = (a, b) -> a * b;

Abacus aba = v, w -> x * y;

Abacus aba = (int i, j) -> ( return i * j; };

QUESTION 123
Which module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI module?
module PrintServiceProvider {

requires PrintServiceAPI;
exports org.printservice.spi;
}
module PrintServiceProvider {

requires PrintServiceAPI;
provides org.printservice.spi.Print with
com.provider.PrintService;
}
module PrintServiceProvider {

requires PrintServiceAPI;
uses com.provider.PrintService;
}
module PrintServiceProvider {

requires PrintServiceAPI;
exports org.printservice.spi.Print with
com.provider.PrintService;
}

QUESTION 124
Given:

Which two statements are valid to be written in this interface? (Choose two.)

public abstract void methodB();

final void methodG(){System.out.println(“G”);}

private abstract void methodC();

public String methodD();

public int x;

final void methodE();

public void methodF(){System.out.println(“F”);}

QUESTION 125
Given:

Which two changes need to be made to make this class compile? (Choose two.)

Change Line 1 to an abstract class:public abstract class API {

Change Line 2 access modifier to protected:protected void checkValue(Object value)throws IllegalArgumentException;

Change Line 1 to a class:public class API {

Change Line 1 to extend java.lang.AutoCloseable:public interface API extends AutoCloseable {

Change Line 2 to an abstract method:public abstract void checkValue(Object value)throws IllegalArgumentException;

QUESTION 126
Given:
jdeps -jdkinternals C:workspace4SimpleSecurityjarclasses.jar
Which describes the expected output?

jdeps lists the module dependencies and the package names of all referenced JDK internal APIs. If any are found, the suggested replacements are output in the console.

jdeps outputs an error message that the -jdkinternals option requires either the -summary or the – verbose options to output to the console.

The -jdkinternals option analyzes all classes in the .jar and prints all class-level dependencies.

The -jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.

Explanation
-jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.

QUESTION 127
Given this requirement:
Module vehicle depends on module part and makes its com.vehicle package available for all other modules.
Which module-info.java declaration meets the requirement?

Option A

Option B

Option C

Option D

QUESTION 128
Given:

What is the output?

A compilation error is thrown.

Message from Copier: Attempt00

Message from Abstract Copier: Attempt00

A runtime error is thrown.

QUESTION 129
Given:

What is the result?

An indexOutofBoundsException is thrown at runtime.

At once 0

Hat at store 4

At once 1

Hat at store 1

QUESTION 130
Given:

You want the code to produce this output:
John
Joe
Jane
Which code fragment should be inserted on line 1 and line 2 to produce the output?

Insert Comparator<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2.

Insert Comparator<Person> on line 1.
Insert
public int compareTo(Person person) {
return person.name.compareTo(this.name);
}
on line 2.

Insert Comparable<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2.

Insert Comparator<Person> on line 1.
Insert
public int compare(Person person) {
return person.name.compare(this.name);
}
on line 2.

QUESTION 131
Examine this excerpt from the declaration of the java.se module:

What does the transitive modifier mean?

Only a module that requires the java.se module is permitted to require the java.sql module.

Any module that requires the java.se module does not need to require the java.sql module.

Any module that attempts to require the java.se module actually requires the java.sql module instead.

Any module that requires the java.sql module does not need to require the java.se module.

QUESTION 132
Given:

What is the result?

The compilation fails.
[0). D, | 1). i, | 2). a]

[). o, | 1). a, | 2).]

[0). o, | 1). i, | 2). r]

ArrayIndexOutOfBounds Exception is thrown at runtime.

QUESTION 133
Analyze the code:

Which two options can you insert inside println method to produce Global:namescope? (Choose two.)

Test.prefix+Test.name

new Test().prefix+new Test().name

Test.prefix+Test.getName()

Test.getName+prefix

prefix+Test.name

prefix+name

QUESTION 134
Given:

Which two statements are valid to be written in this interface? (Choose two.)

public abstract void methodB();

final void methodG(){System.out.println(“G”);}

private abstract void methodC();

public String methodD();

public int x;

final void methodE();

public void methodF(){System.out.println(“F”);}

QUESTION 135
Given:

Which three are correct? (Choose three.)

b1.foo(li) prints Hello world!

f1.foo(li) prints Bonjour le monde!

f1.foo(li) prints Hello world!

f1.foo(li) prints Hola Mundo!

b1.foo(li) prints Bonjour le monde!

f2.foo(li) prints Hola Mundo!

f2.foo(li) prints Bonjour le monde!

b1.foo(li) prints Hola Mundo!

f2.foo(li) prints Hello world!

QUESTION 136
Given the code fragment:

What is the result?

-1

-3

QUESTION 137
Given:

Which two constructors will compile and set the class field strings? (Choose two.)

Option A

Option B

Option C

Option D

Option E

QUESTION 138
Given:
public class X {
}
and
public final class Y extends X {
}
What is the result of compiling these two classes?

The compilation fails because there is no zero args constructor defined in class X.

The compilation fails because either class X or class Y needs to implement the toString() method.

The compilation fails because a final class cannot extend another class.

The compilation succeeds.

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IT Certification Exam Questions & Answers

Oracle 1Z0-819 Exam Syllabus Topics:

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