Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 241:

  Which two commands are used to identify class and module dependencies? (Choose two.)

  A. java --show-module-resolution
  B. jmod describe
  C. java Hello.java
  D. jdeps --list-deps
  E. jar --show-module-resolution
  B. jmod describe
  D. jdeps --list-deps

• Question 242:

  Given:

  

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

  

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

• Question 243:

  Given:

  

  executed using this command: java Myclass My Car is red What is the output of this class?

  A. Car--red--My
  B. My--Car--is
  C. My--is--java
  D. java--Myclass--My
  E. Myclass--Car--red
  A. Car--red--My

• Question 244:

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

• Question 245:

  Given:

  

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

• Question 246:

  Given:

  

  What is the result?

  A. 3, 4, 3, 14
  B. 3, 4, 3
  C. The program prints 3 4 and throws a ClassCastException
  D. 3, 4
  C. The program prints 3 4 and throws a ClassCastException

• Question 247:

  Which interface in the java.util.function package will return a void return type?

  A. Supplier
  B. Predicate
  C. Function
  D. Consumer
  D. Consumer

• Question 248:

  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?

  A. If (items.stream () .filter (i -> count < 0) . findFirst () ) {
  B. If (items.stream () .filter (i -> count < 0) . findAny () ) {
  C. If (items.stream () .allmatch (i -> count < 0) < 0) ) { D. If (items.stream () .anymatch (i -> count < 0) < 0) ) {
  A. If (items.stream () .filter (i -> count < 0) . findFirst () ) {

• Question 249:

  Given:

  

  You want the code to produce this output:

  John

  Joe

  Jane

  Which code fragment should be inserted on line 1 and line 2 to produce the output?

  A. Insert Comparator on line 1. Insert public int compare(Person p1, Person p2) { return p1.name.compare(p2.name); } on line 2.
  B. Insert Comparator on line 1. Insert public int compareTo(Person person) { return person.name.compareTo(this.name); } on line 2.
  C. Insert Comparable on line 1. Insert public int compare(Person p1, Person p2) { return p1.name.compare(p2.name); } on line 2.
  D. Insert Comparator on line 1. Insert public int compare(Person person) { return person.name.compare(this.name); } on line 2.
  B. Insert Comparator on line 1. Insert public int compareTo(Person person) { return person.name.compareTo(this.name); } on line 2.

• Question 250:

  Given:

  

  Which is true about line 1?

  A. If the value is not present, a NoSuchElementException is thrown at run time.
  B. It always executes the System.out::print statement.
  C. If the value is not present, a NullPointerException is thrown at run time.
  D. If the value is not present, nothing is done.
  D. If the value is not present, nothing is done.