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Oracle 1Z0-819: Java SE 11 Developer

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Question 1

Given:
1Z0-819 dumps exhibit
Which two statements can be added at line 1 in Bar to successfully compile it? (Choose two.)

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

B. public ArrayList foo(Set m) { ... }

C. public List foo(TreeSet m) { ... }

D. public List foo(Set m) { ... }

E. public List<Object> foo(Set m) { ... }

F. public ArrayList foo(Set m) { ... }

Correct Answer:BC

Question 2

Given:
1Z0-819 dumps exhibit
What is the result?

A. null

B. nothing

C. It fails to compile.

D. java.lang.IllegalAccessException is thrown.

E. Student

Correct Answer:C

Question 3

Given:
1Z0-819 dumps exhibit
What is required to make the Foo class thread safe?

A. No change is required.

B. Make the declaration of lock static.

C. Replace the lock constructor call with new ReentrantLock (true).

D. Move the declaration of lock inside the foo method.

Correct Answer:C

Question 4

Which set of commands is necessary to create and run a custom runtime image from Java source files?

A. java, jdeps

B. javac, jlink

C. jar, jlink

D. javac, jar

Correct Answer:B

Question 5

Given the Person class with age and name along with getter and setter methods, and this code fragment:
1Z0-819 dumps exhibit
What will be the result?

A. Aman Tom Peter

B. Tom Aman Peter

C. Aman Peter Tom

D. Tom Peter Aman

Correct Answer:C

Question 6

Given:
1Z0-819 dumps exhibit
What is known about the Sportscar class?

A. The Sportscar class is a subclass of Automobile and inherits its methods.

B. The Sportscar subclass cannot override setTurbo method from the superclass Automobile.

C. The Sportscar class is a superclass that has more functionality than the Automobile class.

D. The Sportscar class inherits the setTurbo method from the superclass Automobile.

Correct Answer:A

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