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NEW QUESTION 80
Given:

Which statement on line 1 enables this code to compile?

A. Function<int, int> f = n > n * 2;
B. Function<Integer> f = n > n * 2;
C. Function<Integer, Integer> f = n > n * 2;
D. Function f = n > n * 2;
E. Function<int> f = n > n * 2;

Answer: C

Explanation:

NEW QUESTION 81
Given:

What is the result?

A. The code does not compile.
B. It throws a runtime exception.
C. Value of Euler = 2.71828
D. Value of Euler = "2.71828"

Answer: A

NEW QUESTION 82
Given:

Why does D cause a compilation error?

A. D inherits a() only from C.
B. D does not define any method.
C. D extends more than one interface.
D. D inherits a() from B and C but the return types are incompatible.

Answer: D

NEW QUESTION 83
Which is a proper JDBC URL?

A. jdbc:mysql://localhost:3306/database
B. http://localhost mysql.jdbc:3306/database
C. http://localhost.mysql.com:3306/database
D. jdbe.mysql.com://localhost:3306/database

Answer: A

NEW QUESTION 84
Given:

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.

Answer: A

Explanation:

NEW QUESTION 85
Which two statements are correct about modules in Java? (Choose two.)

A. module-info.java cannot be empty.
B. java.base exports all of the Java platforms core packages.
C. A module must be declared in module-info.java file.
D. module-info.java can be placed in any folder inside module-path.
E. By default, modules can access each other as long as they run in the same folder.

Answer: B,C

NEW QUESTION 86
Given the code fragment:

What is the result?

A. abc def
B. The compilation fails.
C. ab cd ef
D. ad be cf
E. An ArrayIndexOutOfBoundsException is thrown at runtime.

Answer: D

NEW QUESTION 87

How many Thing objects are eligible for garbage collection in line 1?

A. 0
B. 1
C. 2
D. 3
E. 4

Answer: E

NEW QUESTION 88
Which two modules include APIs in the Java SE Specification? (Choose two.)

A. jdk.httpserver
B. jdk.jartool
C. java.logging
D. javafx
E. java.desktop

Answer: A,C

NEW QUESTION 89
Given:

What is the result?

A. Keys: 0 Values: 0 Map: 0
B. Keys: 4 Values: 4 Map: 0
C. The compilation fails.
D. Keys: 4 Values: 4 Map: 4
E. Keys: 0 Values: 0 Map:

Answer: D

NEW QUESTION 90
Given:

And the command:
java Main Helloworld
What is the result ?

A. Input: Helloworld Echo: Helloworld
B. A NullPointerException is thrown at run time.
C. Input: Echo:
D. Input: Echo: Helloworld
E. Input: Then block until any input comes from System.in.

Answer: E

Explanation:

NEW QUESTION 91
Given:

What is the result?

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

Answer: B

Explanation:

NEW QUESTION 92
Which two statements correctly describe capabilities of interfaces and abstract classes? (Choose two.)

A. Both interfaces and abstract classes can have final methods.
B. Interfaces cannot have static methods but abstract classes can.
C. Interfaces cannot have methods with bodies but abstract classes can.
D. Interfaces cannot have protected methods but abstract classes can.
E. Interfaces cannot have instance fields but abstract classes can.

Answer: D,E

NEW QUESTION 93
Given:

What is the type of the local variable x?

A. String[ ]
B. String
C. char
D. Character

Answer: B

NEW QUESTION 94
Given:

Which statement is equivalent to line 1?

A. double totalSalary = list.stream().map(e -> e.getSalary() * ratio).reduce (bo).ifPresent (p -> p.doubleValue());
B. double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);
C. double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).reduce(starts, bo);
D. double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).sum;

Answer: B

Explanation:

NEW QUESTION 95
Why does this compilation fail?

A. In method x. print (Collection), system. Out :: prints is an invalid Java identifier.
B. The method Y. print (object) does not call the method super.print (object)
C. The method print (object) and the method print (object...) are duplicates of each other.
D. The method x. print (object) is not accessible to Y.
E. The method Y. print (object...) cannot override the final method x.print (object....).

Answer: C

NEW QUESTION 96
And the code fragment:

Which situation will occur on code fragment execution?

A. Race Condition
B. Starvation
C. Deadlock
D. Livelock

Answer: B

NEW QUESTION 97
Given the code fragment:

What is the result?

A. 0
B. The compilation fails at line 13.
C. 1
D. The compilation fails at line
E. The compilation fails at line 16.

Answer: A

NEW QUESTION 98
Given:

You want to implement the java. Io, serializable interface to the MypersisteneData class.
Which method should be overriden?

A. The writeExternal method
B. The readExternal and writeExternal method
C. The readExternal method
D. nothing

Answer: B

NEW QUESTION 99
Given:

Assuming that this code compiles correctly, which three statements are true? (Choose three.)

A. B cannot be final.
B. A is a subtype of B.
C. A cannot be final.
D. B cannot be abstract.
E. A cannot be abstract.
F. B is a subtype of A.

Answer: C,D,F

NEW QUESTION 100
......

Certification Path for Java SE 11 Developer Exam Number: 1Z0-819

Java SE 11 Developer Exam Number: 1Z0-819 is a fundamental exam. Successful completion by candidates will allow them to achieve Oracle Certified Professional: Java SE 11 Developer.