1Z0-819 Oracle Exam Questions and Free Practice Test

Question 31

Given this enum declaration:
1Z0-819 dumps exhibit
Examine this code: System.out.println(Alphabet.getFirstLetter());
What code should be written at line 3 to make this code print A?

A. final String getFirstLetter() { return A.toString(); }

B. static String getFirstLetter() { return Alphabet.values()[1].toString(); }

C. static String getFirstLetter() { return A.toString(); }

D. String getFirstLetter() { return A.toString(); }

Correct Answer:C

Question 32

Given:
1Z0-819 dumps exhibit
Which two allow a.Main to allocate a new Person? (Choose two.)

A. In Line 1, change the access modifier to privateprivate Person() {

B. In Line 1, change the access modifier to publicpublic Person() {

C. In Line 2, add extends Person to the Main classpublic class Main extends Person {and change Line 3 to create a new Main objectPerson person = new Main();

D. In Line 2, change the access modifier to protectedprotected class Main {

E. In Line 1, remove the access modifierPerson() {

Correct Answer:BC

Question 33

Which three annotation uses are valid? (Choose three.)

A. Function<String, String> func = (@NonNull x) > x.toUpperCase();

B. var v = “Hello” + (@Interned) “World”

C. Function func = (var @NonNull x) > x.toUpperCase();

D. Function func = (@NonNull var x) > x.toUpperCase();

E. var myString = (@NonNull String) str;

F. var obj = new @Interned MyObject();

Correct Answer:ACF

Question 34

Which code is correct?

A. Runnable r = “Message” > System.out.println();

B. Runnable r = () > System.out::print;

C. Runnable r = () -> {System.out.println(“Message”);};

D. Runnable r = > System.out.println(“Message”);

E. Runnable r = {System.out.println(“Message”)};

Correct Answer:C

Question 35

Given:
1Z0-819 dumps exhibit
Which one is correct?

A. An IllegalThreadStateException is thrown at run time.

B. Three threads are created.

C. The compilation fails.

D. Four threads are created.

Correct Answer:A
1Z0-819 dumps exhibit

Question 36

Given:
1Z0-819 dumps exhibit
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);

Correct Answer:C

START 1Z0-819 EXAM