[Aug-2023] Practice Oracle 1z1-819 exam. Online Exam Practice Tests with detailed explanations! Pass 1z1-819 with confidence! [Q79-Q103]

Rate this post

Practice Oracle Java SE 1z1-819 exam. Online Exam Practice Tests with detailed explanations! Pass 1z1-819 with confidence!

1z1-819 – Java SE 11 Developer Practice Tests 2023 | BraindumpsIT

NEW QUESTION 79
Given:

What is the result?

nothing

It fails to compile.

A java.lang.IllegalArgumentException is thrown.

NEW QUESTION 80
Given:

Which two are secure serialization of these objects? (Choose two.)

Define the serialPersistentFields array field.

Declare fields transient.

Implement only readResolve to replace the instance with a serial proxy and not writeReplace.

Make the class abstract.

Implement only writeReplace to replace the instance with a serial proxy and not readResolve.

NEW QUESTION 81
Given:

Which three classes successfully override printOne()? (Choose three.)

Option A

Option B

Option C

Option D

Option E

Option F

NEW QUESTION 82
Given:

What is the result?

5 4 3 2 1

nothing

5 4 3 2 1 4 3 2 1 3 2 1 2 1 1

Explanation
Graphical user interface, application Description automatically generated

NEW QUESTION 83
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.

NEW QUESTION 84
Given the code fragment:

What is the result?

-1 : 2

2 : -1

2 : 3

3 : 0

NEW QUESTION 85
Given:

Which three are true? (Choose three.)

b1.foo(c) prints Bonjour le monde!

f1.foo(c) prints Hello world!

f1.foo(c) prints Ola Mundo!

b1.foo(c) prints Hello world!

f2.foo(c) prints Ola Mundo!

b1.foo(c) prints Ola Mundo!

f2.foo(c) prints Bonjour le monde!

f2.foo(c) prints Hello world!

f1.foo(c) prints Bonjour le monde!

NEW QUESTION 86
You are working on a functional bug in a tool used by your development organization. In your investigation, you find that the tool is executed with a security policy file containing this grant.

What action should you take?

Nothing, because it is an internal tool and not exposed to the public.

Remove the grant because it is excessive.

Nothing, because it is not related to the bug you are investigating.

File a security bug against the tool referencing the excessive permission granted.

Nothing, because listing just the required permissions would be an ongoing maintenance challenge.

NEW QUESTION 87
Given:

Which two interfaces can be used in lambda expressions? (Choose two.)

MyInterface4

MyInterface5

MyInterface1

MyInterface3

MyInterface2

NEW QUESTION 88
Given:

What is the result?

NEW QUESTION 89
Given:

Which two methods modify field values? (Choose two.)

setAllCounts

setACount

setGCount

setCCount

setTCount

NEW QUESTION 90
var numbers = List.of(0,1,2,3,4,5,6,7,8,9);
You want to calculate the average of numbers. Which two codes will accomplish this? (Choose two.)

double avg = numbers.stream().parallel().averagingDouble(a -> a);

double avg = numbers.parallelStream().mapToInt (m -> m).average().getAsDouble ();

double avg = numbers.stream().mapToInt (i -> i).average().parallel();

double avg = numbers.stream().average().getAsDouble();

double avg = numbers.stream().collect(Collectors.averagingDouble(n -> n));

NEW QUESTION 91
Given:

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

The compilation fails.

/u01/work/filestore.txt is not deleted.

Exception

/u01/work/filestore.txt is deleted.

NEW QUESTION 92
Given TripleThis.java:

Compiling TripleThis.java gives this compiler warning:
Note: TripleThis.java uses unchecked or unsafe operations.
Which two replacements done together remove this compiler warning?

Replace line 9 with function<Integer> tripler = x-> – { return (Integer) X * 3 ; }.

Replace line 12 with public static void printValue function<Integer> f, int num) {.

Replace line 12 with public static int printValue function<Integer, Integer>, f, T num {.

Replace line 12 with public static <T> void printValue (Function<T, T> f, T num ) {,

Replace line 9 with function<Integer>, Integer> = X -> { return (integer) x * 3; }.

NEW QUESTION 93
Given:

executed with this command:
java Main one two three
What is the output of this class?

The compilation fails.

1) one2) two3) three

A java.lang.ArrayIndexOutOfBoundsException is thrown.

1) one

nothing

NEW QUESTION 94
Given the code fragment:

What is the result?

NEW QUESTION 95
Given:

Assuming that this code compiles correctly, which three statements are true? (Choose three.)

B cannot be abstract.

B is a subtype of A.

A cannot be abstract.

A cannot be final.

B cannot be final.

A is a subtype of B.

NEW QUESTION 96
Given:

What is the result?

The compilation fails.

1.99,2.99,0

1.99,2.99,0.0

1.99,2.99

NEW QUESTION 97
Given:

What is the result?

385

The compilation fails.

NEW QUESTION 98
Given:

What is the output?

A compilation error is thrown.

Message from Copier: Attempt00

Message from Abstract Copier: Attempt00

A runtime error is thrown.

NEW QUESTION 99
Given:

What is the result?

The compilation fails due to an error in line 4.

The compilation fails due to an error in line 3.

The compilation fails due to an error in line 2.

The compilation fails due to an error in line 1.

The compilation fails due to an error in line 5.

NEW QUESTION 100
A company has an existing sales application using a Java 8 jar file containing packages:
com.company.customer;
com.company.customer.orders;
com.company.customer.info;
com.company.sales;
com.company.sales.leads;
com.company.sales.closed;
com.company.orders;
com.company.orders.pending;
com.company.orders.shipped.
To modularize this jar file into three modules, customer, sales, and orders, which module-info.java would be correct?
A)

B)

C)

D)

Option A

Option B

Option C

Option D

NEW QUESTION 101
Given the code fragment:

What change on line 1 will make this code compile?

Add catch (L |N e).

Add catch (L |M N e).

Add catch (L e).

Add catch (N | L | M e).

Add catch (M |L e).

NEW QUESTION 102
Assuming the Widget class has a getPrice method, this code does not compile:

Which two statements, independently, would allow this code to compile? (Choose two.)