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Java SE 11 Developer

Last Update 19 hours ago Total Questions : 296

The Java SE 11 Developer content is now fully updated, with all current exam questions added 19 hours ago. Deciding to include 1z0-819 practice exam questions in your study plan goes far beyond basic test preparation.

You'll find that our 1z0-819 exam questions frequently feature detailed scenarios and practical problem-solving exercises that directly mirror industry challenges. Engaging with these 1z0-819 sample sets allows you to effectively manage your time and pace yourself, giving you the ability to finish any Java SE 11 Developer practice test comfortably within the allotted time.

Question # 41

Your organization makes mlib.jar available to your cloud customers. While working on a new feature for mlib.jar , you see that the customer visible method

public void enableService(String hostName, String portNumber)

executes this code fragment

and you see this grant is in the security policy file:

What security vulnerability does this expose to your cloud customer ' s code?

A.

privilege escalation attack against the OS running the customer code

B.

SQL injection attack against the specified host and port

C.

XML injection attack against any mlib server

D.

none because the customer code base must also be granted SocketPermission

E.

denial of service attack against any reachable machine

Question # 42

Given:

What is the result?

A.

2-4

B.

0-6

1-5

2-4

C.

1-5

D.

1-5

2-4

E.

The compilation fails due to an error in line 1.

F.

0-6

G.

0-6

2-4

Question # 43

Which statement about a functional interface is true?

A.

It must be defined with the public access modifier.

B.

It must be annotated with @FunctionalInterface.

C.

It is declared with a single abstract method.

D.

It is declared with a single default method.

E.

It cannot have any private methods and static methods.

Question # 44

Given:

What is the result?

A.

A ClassCastException is thrown at runtime.

B.

AnotherClass#methodA()AnotherClass#methodA()

C.

The compilation fails.

D.

SomeClass#methodA()AnotherClass#methodA()

E.

AnotherClass#methodA()SomeClass#methodA()

F.

SomeClass#methodA()SomeClass#methodA()

Question # 45

Which two commands are used to identify class and module dependencies? (Choose two.)

A.

jmod describe

B.

java Hello.java

C.

jdeps --list-deps

D.

jar --show-module-resolution

E.

java --show-module-resolution

Question # 46

Given:

What must be added in line 1 to compile this class?

A.

catch(IOException e) { }

B.

catch(FileNotFoundException | IndexOutOfBoundsException e) { }

C.

catch(FileNotFoundException | IOException e) { }

D.

catch(IndexOutOfBoundsException e) { }catch(FileNotFoundException e) { }

E.

catch(FileNotFoundException e) { }catch(IndexOutOfBoundsException e) { }

Question # 47

Given:

What is known about the Sportscar class?

A.

The Sportscar class is a subclass of Automobile and inherits its methods.

B.

The Sportscar subclass cannot override setTurbo method from the superclass Automobile.

C.

The Sportscar class is a superclass that has more functionality than the Automobile class.

D.

The Sportscar class inherits the setTurbo method from the superclass Automobile.

Question # 48

Given:

Which three are true? (Choose three.)

A.

b1.foo(c) prints Bonjour le monde!

B.

f1.foo(c) prints Hello world!

C.

f1.foo(c) prints Olá Mundo!

D.

b1.foo(c) prints Hello world!

E.

f2.foo(c) prints Olá Mundo!

F.

b1.foo(c) prints Olá Mundo!

G.

f2.foo(c) prints Bonjour le monde!

Question # 49

Given these classes:

And this code fragment:

What is the result?

A.

The program prints: A

B.

The program fails to compile.

C.

The program prints: c

D.

The program throws an exception.

Question # 50

Given:

And the command:

java Main Helloworld

What is the result ?

A.

Input: Echo:

B.

Input: Helloworld Echo: Helloworld

C.

Input:

Then block until any input comes from System.in.

D.

Input:

Echo: Helloworld

E.

A NullPointerException is thrown at run time.

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