Real Oracle 1z1-819 Exam Questions Study Guide [Q156-Q178]

Real Oracle 1z1-819 Exam Questions Study Guide

Updated and Accurate 1z1-819 Questions for passing the exam Quickly

The Oracle 1Z0-819 (Java SE 11 Developer) certification exam is widely recognized in the industry and is highly valued by employers. Passing this exam demonstrates that a developer has a deep understanding of Java SE 11 and is capable of developing high-quality applications using this technology. It also opens up new career opportunities and can lead to higher salaries and more challenging roles within an organization.

The Oracle 1z1-819 certification exam is a valuable credential for Java developers, as it demonstrates their proficiency in the language and validates their skills to potential employers. By passing this exam, developers can enhance their career prospects and stand out in a competitive job market.

To prepare for the Oracle 1z1-819 (Java SE 11 Developer) Certification Exam, candidates should have a solid understanding of Java SE 11 development. Candidates should be familiar with Java syntax, data types, control structures, and object-oriented programming principles. Additionally, candidates should practice writing Java code to solve problems. There are many resources available to help candidates prepare for the exam, including online courses, books, and practice exams.

NEW QUESTION # 156
Given:

What is the result?

A. [0,0] = Red[1,0] = Black[2,0] = Blue
B. [0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet
C. java.lang.ArrayIndexOutOfBoundsException thrown
D. [0,0] = Red[0,1] = White[1,0] = Black[2,0] = Blue[2,1] = Yellow[2,2] = Green[2,3] = Violet

Answer: D

Explanation:

NEW QUESTION # 157
Given:

What is the output?

A. A NullPointerException is thrown at run time.
B. A NoSuchElementException is thrown at run time.
C. null
D. Duke

Answer: D

Explanation:

NEW QUESTION # 158
Given:

What is the result?

A. Good Night, Potter
B. Good Night, Harry
C. Good Morning, Harry
D. Good Morning, Potter

Answer: A

Explanation:

NEW QUESTION # 159
Which code fragment compiles?

A. Option B
B. Option D
C. Option A
D. Option C

Answer: B

Explanation:

NEW QUESTION # 160
Given:

Which two method implementations are correct, when inserted independently in line 1? (Choose two.)

A. Option A
B. Option D
C. Option B
D. Option E
E. Option C

Answer: A,D

NEW QUESTION # 161
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. B, because enquoting values provided by the calling code prevents SQL injection.
B. B, because all values provided by the calling code should be enquoted.
C. A and B are functionally equivalent.
D. A, because it is unnecessary to enclose identifiers in quotes.
E. A, because it sends exactly the value of user provided by the calling code.

Answer: E

NEW QUESTION # 162
Given:

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

A. getTotalCount
B. getACount
C. getCCount
D. getGCount
E. getTCount

Answer: A,C

NEW QUESTION # 163
Given:

Which loop incurs a compile time error?

A. the loop starting line 14
B. the loop starting line 11
C. the loop starting line 3
D. the loop starting line 7

Answer: A

NEW QUESTION # 164
Given:

Which annotation should be used to remove warnings from compilation?

A. @SuppressWarnings on the main and print methods
B. @SuppressWarnings("rawtypes") on main and @SafeVarargs on the print method
C. @SuppressWarnings("all") on the main and print methods
D. @SuppressWarnings("unchecked") on main and @SafeVarargs on the print method

Answer: D

Explanation:

NEW QUESTION # 165
Given the code fragment:

You want to display the value of currency as $100.00.
Which code inserted on line 1 will accomplish this?

A. NumberFormat formatter = NumberFormat.getInstance(locale);
B. NumberFormat formatter = NumberFormat.getInstance(locale).getCurrency();
C. NumberFormat formatter = NumberFormat.getCurrencyInstance(locale);
D. NumberFormat formatter = NumberFormat.getCurrency(locale);

Answer: B

NEW QUESTION # 166
Given:

You want to obtain the Filechannel object on line 1.
Which code fragment will accomplish this?
A)

B)

C)

D)

A. Option A
B. Option D
C. Option B
D. Option C

Answer: A

NEW QUESTION # 167
Given:

What is the correct definition of the JsonField annotation that makes the Point class compile?
A)

B)

C)

A. Option A
B. Option B
C. Option C

Answer: A

NEW QUESTION # 168
Given:

Which statement is true?

A. Only LocalDate class from java.time package is loaded.
B. Class Tester does not need to import java.time.LocalDate because it is already visible to members of the package test.
C. All classes from the package java.time. are loaded for the class Diary.
D. Tester must import java.time.LocalDate in order to compile.

Answer: B

NEW QUESTION # 169
Given:

When run and all three files exist, what is the state of each reader on Line 1?

A. All three readers have been closed.
B. The compilation fails.
C. Only reader1 has been closed.
D. All three readers are still open.

Answer: B

NEW QUESTION # 170
Given the code fragment:
var pool = Executors.newFixedThreadPool(5);
Future outcome = pool.submit(() > 1);
Which type of lambda expression is passed into submit()?

A. java.util.function.Predicate
B. java.util.function.Function
C. java.lang.Runnable
D. java.util.concurrent.Callable

Answer: D

NEW QUESTION # 171
Given:

You want to obtain the Stream object on reading the file. Which code inserted on line 1 will accomplish this?

A. var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
B. Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
C. var lines = Files.lines(Paths.get(INPUT_FILE_NAME));
D. Stream<String> lines = Files.lines(INPUT_FILE_NAME);

Answer: A

NEW QUESTION # 172
Given the code fragment:

Which can replace line 11?

A. UnaryOperator<Interger >uo = var x -> { return x 3 ; };
B. UnaryOperator<Interger > uo = (var x ) -> (x * 3);
C. UnaryOperator<Interger >uo = (int x) -> x * 3;
D. UnaryOperator<Interger >uo = x -> { return x * 3; };

Answer: B

NEW QUESTION # 173
Given the code fragment:

What is the result?

A. false false true
B. false true true
C. true false false
D. false true false

Answer: D

Explanation:

NEW QUESTION # 174
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?