05 May, 2021

A Review Of Simulation 1Z0-819 Training Materials

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Online 1Z0-819 free questions and answers of New Version:

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Total 175 questions Full Exam Access

Question 1

Given:

Which expression when added at line 1 will produce the output of 1.17?

float z = (float)(Math.round((float)x/y*100)/100);

float z = Math.round((int)(x/y),2);

float z = Math.round((float)x/y,2);

float z = Math.round((float)x/y*100)/(float)100;

Question 2

Given:

What is the result?

A ClassCastException is thrown at runtime.

AnotherClass#methodA()AnotherClass#methodA()

The compilation fails.

SomeClass#methodA()AnotherClass#methodA()

AnotherClass#methodA()SomeClass#methodA()

SomeClass#methodA()SomeClass#methodA()

Question 3

Analyze the code:
1Z0-819 dumps exhibit

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 4

Which two statements are correct about modules in Java? (Choose two.)

java.base exports all of the Java platforms core packages.

module-info.java can be placed in any folder inside module-path.

A module must be declared in module-info.java file.

module-info.java cannot be empty.

By default, modules can access each other as long as they run in the same folder.

Question 5

Given:

What is the output?

Hello world!Bonjour le monde!

Hello world!Hello world!

Bonjour le monde!Hello world!

Bonjour le monde!Bonjour le monde!

Question 6

Which describes an aspect of Java that contributes to high performance?

Java prioritizes garbage collection.

Java has a library of built-in functions that can be used to enable pipeline burst execution.

Java monitors and optimizes code that is frequently executed.

Java automatically parallelizes code execution.

Question 7

What makes Java dynamic?

At runtime, classes are loaded as needed, and new code modules can be loaded on demand.

The runtime can process machine language sources as well as executables from different language compilers.

The Java compiler uses reflection to test if class methods are supported by resources of a target platform.

The Java compiler preprocesses classes to run on specific target platforms.

Question 8

Given:

Which two methods facilitate valid ways to read instance fields? (Choose two.)

getTCount

getACount

getTotalCount

getCCount

getGCount

Question 9

Given the code fragment:
1Z0-819 dumps exhibit

What is the result?

-1 : 2

2 : -1

2 : 3

3 : 0

Question 10

Given:

What code must you insert on Line 1 to enable the code to print Hello world?

Hello.Greeting myG = new Hello.Greeting() myG.sayHi();

Hello myH = new Hello();Hello.Greeting myG = myH.new Greeting(); myG.sayHi();

Hello myH = new Hello();Hello.Greeting myG = myH.new Hello.Greeting(); myG.sayHi();

Hello myH = new Hello(); Greeting myG = new Greeting(); myG.sayHi ();

Question 11

Given:

Which two are correct? (Choose two.)

The output will be exactly 2 1 3 4 5.

The program prints 1 4 2 3, but the order is unpredictable.

Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5, but the order is unpredictable.

Replacing forEach() with forEachOrdered(), the program prints 1 2 3 4 5.

Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5.

Question 12

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 13

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 API

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 API

If any are found, the results with suggested replacements are output in the console.

Question 14

Which two statements independently compile? (Choose two.)

List<? super Short> list = new ArrayList<Number>();

List<? super Number> list = new ArrayList<Integer>();

List<? extends Number> list = new ArrayList<Byte>();

List<? extends Number> list = new ArrayList<Object>();

List<? super Float> list = new ArrayList<Double>();

Question 15

Which three guidelines are used to protect confidential information? (Choose three.)

Limit access to objects holding confidential information.

Clearly identify and label confidential information.

Manage confidential and other information uniformly.

Transparently handle information to improve diagnostics.

Treat user input as normal information.

Validate input before storing confidential information.

Encapsulate confidential information.

Question 16

Given the code fragment:
1Z0-819 dumps exhibit

What is the result?

The program prints nothing.

It prints 1 in the infinite loop.

Question 17

Given:

What is the result?

An exception is thrown at runtim

42=(x+y)=42

42=(x+y)=6

6=(x+y)=42

6=(x+y)=6

Question 18

Which two describe reasons to modularize the JDK? (Choose two.)

easier to understand the Java language

improves security and maintainability

easier to expose implementation details

improves application robustness

easier to build a custom runtime linking application modules and JDK modules

Question 19

Given:

What is known about the Sportscar class?

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

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

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

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

Question 20

Given:

What is the output?

:APPLE:ORANGE:BANANAappleorangebanana

:APPLE:ORANGE:BANANA

APPLE:apple ORANGE:orange BANANA:banana

appleorangebanana:APPLE:ORANGE:BANANA

apple:APPLE orange:ORANGE banana:BANANA

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Total 175 questions Full Exam Access