The Secret Of Oracle 1Z0-819 Training

NEW QUESTION 1
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<String, String> func = (var @NonNull x) > x.toUpperCase();
• D. Function<String, String> func = (@NonNull var x) > x.toUpperCase();
• E. var myString = (@NonNull String) str;
• F. var obj = new @Interned MyObject();

Answer: ACF

NEW QUESTION 2
Given:

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() {

Answer: BC

NEW QUESTION 3
Given:

What is the result?

• A. watermelonorangelemongrapeapricotapple
• B. nothing
• C. appleapricotgrapelemonorangewatermelon
• D. appleorangegrapelemonapricotwatermelon

Answer: A

Explanation:

NEW QUESTION 4
Given:

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

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

Answer: CE

NEW QUESTION 5
Given:

Which is true?

• A. System.out is the standard output strea
• B. The stream is open only when System.out is called.
• C. System.in cannot reassign the other stream.
• D. System.out is an instance of java.io.OutputStream by default.
• E. System.in is the standard input strea
• F. The stream is already open.

Answer: D

NEW QUESTION 6
Given:

Which three classes successfully override printOne()? (Choose three.)

• A. Option A
• B. Option B
• C. Option C
• D. Option D
• E. Option E
• F. Option F

Answer: ACD

NEW QUESTION 7
Given:
jdeps -jdkinternals C:\workspace4\SimpleSecurity\jar\classes.jar
Which describes the expected output?

• A. jdeps lists the module dependencies and the package names of all referenced JDK internal API
• B. If any are found, the suggested replacements are output in the console.
• C. jdeps outputs an error message that the -jdkinternals option requires either the -summary or the - verbose options to output to the console.
• D. The -jdkinternals option analyzes all classes in the .jar and prints all class-level dependencies.
• E. The -jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal API
• F. If any are found, the results with suggested replacements are output in the console.

Answer: A

Explanation:
-jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.

NEW QUESTION 8
Given:

What is the result?

• A. 42
• B. The compilation fails due to an error in line 4.
• C. 17
• D. The compilation fails due to an error in line 3.
• E. The compilation fails due to an error in line 2.
• F. The compilation fails due to an error in line 1.
• G. The compilation fails due to an error in line 5.

Answer: A

NEW QUESTION 9
Given:

What is the result?

• A. is it 1
• B. An IndexOutOfBoundsException is thrown at runtime.
• C. is it 0
• D. this is it 2
• E. this is it 3

Answer: D

Explanation:

NEW QUESTION 10
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

Answer: A

NEW QUESTION 11
Which two statements are correct about try blocks? (Choose two.)

• A. A try block can have more than one catch block.
• B. A finally block in a try-with-resources statement executes before the resources declared are closed.
• C. A finally block must be immediately placed after the try or catch blocks.
• D. A try block must have a catch block and a finally block.
• E. catch blocks must be ordered from generic to specific exception types.

Answer: AC

NEW QUESTION 12
Given:

Which two statements are true if the method is added to Bar? (Choose two.)

• A. public Collection<String> foo(Collection<String> arg) { ... } overrides Foo.foo.
• B. public <T> Collection<T> foo(Stream<T> arg) { ... } overloads Foo.foo.
• C. public <T> List<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
• D. public <T> Collection<T> foo(Collection<T> arg) { ... } overloads Foo.foo.
• E. public <T> Collection<T> bar(Collection<T> arg) { ... } overloads Foo.foo.
• F. public <T> Iterable<T> foo(Collection<T> arg) { ... } overrides Foo.foo.

Answer: CF

NEW QUESTION 13
Given:

What is the result?

• A. [0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet
• B. [0,0] = Red[1,0] = Black[2,0] = Blue
• 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 14
Examine these module declarations:

Which two statements are correct? (Choose two.)

• A. The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.
• B. The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.
• C. The Consumer module should require the ServiceProvider module.
• D. The ServiceProvider module should export the com.myimpl package.
• E. The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the com.example.api API.

Answer: AC

NEW QUESTION 15
Given:

Which two lines cause compilation errors? (Choose two.)

• A. line 12
• B. line 6
• C. line 9
• D. line 8
• E. line 7

Answer: BE

NEW QUESTION 16
Given the code fragment:

What is the result?

• A. 23
• B. 12
• C. 123
• D. 13

Answer: A

Explanation:

NEW QUESTION 17
Given:

What is the result?

• A. JoeMarry
• B. Joenull
• C. nullnull
• D. nullMary

Answer: D

Explanation:

NEW QUESTION 18
......