[Dec-2022] Oracle 1Z0-819 Test Engine PDF - All Free Dumps from PrepAwayTest [Q33-Q53]

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[Dec-2022] Oracle 1Z0-819 Test Engine PDF – All Free Dumps from PrepAwayTest

Get New 1Z0-819 Certification – Valid Exam Dumps Questions

Q33. Given:

What is the type of the local variable x?

Character

char

String[ ]

String

Q34. Your organization makes mlib.jar available to your cloud customers. While working on a code cleanup project for mlib.jar, you see this method by customers:

What security measures should be added to this method so that it meets the requirements for a customer accessible method?

Create a method that validates the hostName and portNumber parameters before opening the socket.

Make enableService private.

Enclose the call to new Socket In an AccessController.doPrivileged block.

Q35. Given:
List<String> longlist = List.of(“Hello”,”World”,”Beat”);
List<String> shortlist = new ArrayList<>();
Which code fragment correctly forms a short list of words containing the letter “e”?

Option A

Option B

Option C

Option D

Q36. Given:

Which code fragment on line 1 makes the m map contain the employee with the highest salary for each neighborhood?
A)

B)

C)

D)

Option A

Option B

Option C

Option D

Q37. Given:

Which two lines inserted in line 1 will allow this code to compile? (Choose two.)

protected void walk(){}

void walk(){}

abstract void walk();

private void walk(){}

public abstract void walk();

Q38. Given:
var data = new ArrayList<>();
data.add(“Peter”);
data.add(30);
data.add(“Market Road”);
data.set(1, 25);
data.remove(2);
data.set(3, 1000L);
System.out.print(data);
What is the output?

[Market Road, 1000]

[Peter, 30, Market Road]

[Peter, 25, null, 1000]

An exception is thrown at run time.

Q39. Given:

Which two statements can be added at line 1 in Bar to successfully compile it? (Choose two.)

public List<Integer> foo(Set<CharSequence> m) { … }

public ArrayList<Number> foo(Set<CharSequence> m) { … }

public List<Integer> foo(TreeSet<String> m) { … }

public List<Integer> foo(Set<String> m) { … }

public List<Object> foo(Set<CharSequence> m) { … }

public ArrayList<Integer> foo(Set<String> m) { … }

Q40. Given:

What is the result?

is it 1

An IndexOutOfBoundsException is thrown at runtime.

is it 0

this is it 2

this is it 3

Q41. Given the code fragment:

What is the result?

The compilation fails at line

The compilation fails at line 16.

The compilation fails at line 13.

Q42. Given:

What is the result?

The compilation fails.

1.99,2.99,0

1.99,2.99,0.0

1.99,2.99

Q43. Given:

What is the result?

watermelonorangelemongrapeapricotapple

nothing

appleapricotgrapelemonorangewatermelon

appleorangegrapelemonapricotwatermelon

Q44. Given the formula to calculate a monthly mortgage payment:

and these declarations:

How can you code the formula?

m = p * (r * Math.pow(1 + r, n) / (Math.pow(1 + r, n) – 1));

m = p * ((r * Math.pow(1 + r, n) / (Math.pow(1 + r, n)) – 1));

m = p * r * Math.pow(1 + r, n) / Math.pow(1 + r, n) – 1;

m = p * (r * Math.pow(1 + r, n) / Math.pow(1 + r, n) – 1);

Q45. Given:

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

Option A

Option B

Option C

Option D

Option E

Q46. Given:

Which line of code results in a compilation error?

line n1

line n3

line n2

line n4

Q47. Given:

and

What is the result?
Joe

null
null

Mary
Joe

Marry
null

null

Q48. 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.

Q49. 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!

Q50. Given:

What is the result?

It throws a runtime exception.

Value of Euler = 2.71828

The code does not compile.

Value of Euler = “2.71828”

Q51. Given the code fragment:

Which code fragment replaces the for statement?

IntStream.rangeClosed(l, 100).map(FizzBuzz::convert).forEach(System.out::println);

IntStream.ranged, 100).map(FizzBuzz::convert).forEach(System.out::println);

intstream.rangeclosed(l, 100).mapToObj{FizzBuzz::convert).forEach(System.out::printIn);

IntStream.range(1, 100).mapToObj(FizzBuzz::convert).forEach(System.out::println);

Q52. Given:

What is the result?

An exception is thrown at runtime.

Q53. A company has an existing Java app that includes two Java 8 jar files, sales-3.10. jar and clients-10.2.jar.
The jar file ,sales -8, 10, jar reference packages in clients -10.2 jar, but clients-10.2 jar does not reference packages in sales -8.10, jar.
They have decided to modularize clients-10.2.jar.
Which module-info. Java file would work for the new library version clients-10.3 jar?
A)

B)

C)

D)