[Mar 02, 2024] Get New 1Z0-819 Certification Practice Test Questions Exam Dumps [Q30-Q49]

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[Mar 02, 2024] Get New 1Z0-819 Certification Practice Test Questions Exam Dumps

Real 1Z0-819 Exam Dumps Questions Valid 1Z0-819 Dumps PDF

QUESTION 30
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.

QUESTION 31
Given:

and
checkQuality(QUALITY.A);
and

Which code fragment can be inserted into the switch statement to print Best?

QUALITY.A.ValueOf()

A.toString()

QUALITY.A

QUESTION 32
Given:

What will secure this code from a potential Denial of Service condition?

After Line 4, add indexReader.close().

On Line 3, enclose processData(dataReader) with try with resources.

After Line 3, add dataReader.close().

On Line 1, use try with resources when opening each dataReader.

Before Line 1, check the size of dataFiles to make sure it does not exceed a threshold.

QUESTION 33
Given:

Which two independent changes will make the Main class compile? (Choose two.)

Move the entire Student class declaration to a separate Java file, Student.java.

Change line 2 to public Student(String classname).

Change line 1 to public class Student {.

Change line 3 to Student student = new Student(“Biology”);.

Change line 1 to static class Student {.

QUESTION 34
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

QUESTION 35
Given the content:

What Is the result?
A)

B)

C)

D)

E)
User Username

Option A

Option B

Option C

Option D

Option

QUESTION 36

A)

B)

C)

D)

Option A

Option B

Option C

Option D

QUESTION 37
Given the code fragment:

What is the result?

EUR -> 0.84
GBP -> 0.75
USD -> 1.00
CNY -> 6.42

The compilation fails.

CNY -> 6.42
EUR -> 0.84
GBP -> 0.75
USD -> 1.00

USD -> 1.00
GBP -> 0.75
EUR -> 0.84
CNY -> 6.42

QUESTION 38
Given:

You want to examine the items list it contains an item for which the variable count is below zero.
Which code fragment at line 1 accomplish this?

If (items.stream () .filter (i -> count < 0) . findFirst () ) {

If (items.stream () .filter (i -> count < 0) . findAny () ) {

If (items.stream () .allmatch (i -> count < 0) < 0) ) {

If (items.stream () .anymatch (i -> count < 0) < 0) ) {

QUESTION 39
Given:

What is the output?

300

Exception

200

100

QUESTION 40
Which method throws an exception for not-a-number and infinite input values?
A)

B)

C)

D)

Option A

Option B

Option C

Option D

QUESTION 41
Given:

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

Option A

Option B

Option C

Option D

Option E

Option F

QUESTION 42
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.)

Replace line 5 with widgetStream.filter(a -> ((Widget)a).getPrice() > 20.00).

Replace line 1 with List<Widget> widgetStream = widgets.stream();.

Replace line 5 with widgetStream.filter((Widget a) -> a.getPrice() > 20.00).

Replace line 4 with Stream<Widget> widgetStream = widgets.stream();.

QUESTION 43
Given:

Which option should you choose to enable the code to print Something happened?

Add extends GeneralException on line 1.
Add extends Exception on line 2.

Add extends SpecificException on line 1.
Add extends GeneralException on line 2.

Add extends Exception on line 1.
Add extends Exception on line 2.

Add extends Exception on line 1.
Add extends GeneralException on line 2.

QUESTION 44
Which two statements set the default locale used for formatting numbers, currency, and percentages? (Choose two.)

Locale.setDefault(Locale.Category.FORMAT, “zh-CN”);

Locale.setDefault(Locale.Category.FORMAT, Locale.CANADA_FRENCH);

Locale.setDefault(Locale.SIMPLIFIED_CHINESE);

Locale.setDefault(“en_CA”);

Locale.setDefault(“es”, Locale.US);

QUESTION 45
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 46
Given:

If file “App.config” is not found, what is the result?

Configuration is OK

The compilation fails.

Exception in thread “main” java.lang.Error:Fatal Error: Configuration File, App.config, is missing.

nothing

QUESTION 47
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.

QUESTION 48
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.

QUESTION 49
Assume ds is a DataSource and the EMP table is defined appropriately.

What does executing this code fragment do?

inserts two rows (101, ‘SMITH’, ‘HR’) and (102, ‘JONES’, NULL)

inserts two rows (101, ‘SMITH’, ‘HR’) and (102, ‘JONES’, ‘HR’)

inserts one row (101, ‘SMITH’, ‘HR’)

throws a SQLException

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[Mar 02, 2024] Get New 1Z0-819 Certification Practice Test Questions Exam Dumps [Q30-Q49]

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