2023 Updated Oracle 1Z0-819 Dumps PDF – Want To Pass 1Z0-819 Fast [Q131-Q154]

1Z0-819 Oracle

admin • March 22, 2023

2023 Updated Oracle 1Z0-819 Dumps PDF – Want To Pass 1Z0-819 Fast [Q131-Q154]

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2023 Updated Oracle 1Z0-819 Dumps PDF – Want To Pass 1Z0-819 Fast

1Z0-819 Practice Exam Dumps – 99% Marks In Oracle Exam

Q131. 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.

Q132. Given:

It is required that if p instanceof Pairthen p.isValid()returns true.
Which is the smallest set of visibility changes to insure this requirement is met?

left, right, setLeft, and setRightmust be private.

setLeftand setRightmust be protected.

leftand rightmust be private.

isValidmust be public.

Q133. 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

Q134. 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”

Q135. Given:

and

Which two method definitions at line n1 in the Bar class compile? (Choose two.)

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

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

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

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

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

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

Q136. Given:

executed using command:
java Hello “Hello World” Hello World
What is the output?

An exception is thrown at runtime.

Hello WorldHello World

Hello World Hello World

Hello WorldHelloWorld

HelloHello WorldHelloWorld

Q137. 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);

Q138. Given:

And the command:
java Main Helloworld
What is the result ?

Input: Echo:

Input: Helloworld Echo: Helloworld

Input:
Then block until any input comes from System.in.

Input:
Echo: Helloworld

A NullPointerException is thrown at run time.

Q139. Consider this method declaration:

A) “SET SESSION AUTHORIZATION ” + user
B) “SET SESSION AUTHORIZATION ” + stmt.enquoteIdentifier(user)
Is A or B the correct replacement for <EXPRESSION> and why?

A, because it sends exactly the value of user provided by the calling code.

B, because enquoting values provided by the calling code prevents SQL injection.

A and B are functionally equivalent.

A, because it is unnecessary to enclose identifiers in quotes.

B, because all values provided by the calling code should be enquoted.

Q140. Given the code fragment:

What is the result?

A java.lang, UnsupportedOperationException is thrown.

True

False

A java.lang.NullPointerException is thrown.

Q141. Given:

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

setAllCounts

setACount

setGCount

setCCount

setTCount

Q142. Given:

and

What is the result?

A NullPointerException is thrown at run time.

The compilation fails.

1
Null
null

1
1
1

A ClassCastException is thrown at run time.

Q143. Given:

What is the output?

300

Exception

200

100

Q144. Given:

Which statement is true?

Class Tester does not need to import java.time.LocalDate because it is already visible to members of the package test.

All classes from the package java.time. are loaded for the class Diary.

Only LocalDate class from java.time package is loaded.

Tester must import java.time.LocalDate in order to compile.

Q145. Which code fragment prints 100 random numbers?

Option A

Option B

Option C

Option D

Q146. Given:

What is the result?

The compilation fails.

1.99,2.99,0

1.99,2.99,0.0

1.99,2.99

Q147. Given:

What is the result?

[A, B, C]
followed by an exception thrown on line 11.

[A, B, C]
[A, B]

[A, B, C]
[A, B, C]

On line 9, an exception is thrown at run time.

Explanation
Graphical user interface, text, application Description automatically generated

Q148.

Why does this compilation fail?

The method Y. print (object) does not call the method super.print (object)

The method x. print (object) is not accessible to Y.

In method x. print (Collection), system. Out :: prints is an invalid Java identifier.

The method print (object) and the method print (object…) are duplicates of each other.

The method Y. print (object…) cannot override the final method x.print (object….).

Q149. Given:

A) An exception is thrown at run time.
B)

C) The compilation fails due to an error on line 2.
D) The compilation fails due to an error on line 1.
E)

F)
The compilation fails due to an error on line 3.