Oracle Oracle Certifications 1Z0-815 Questions & Answers

• Question 31:

  Which command line runs the main class com.acme.Main from the module com.example?

  A. java --module-path mods com.example/com.acme.Main

  B. java –classpath com.example.jar com.acme.Main

  C. java --module-path mods -m com.example/com.acme.Main

  D. java -classpath com.example.jar –m com.example/com.acme.Main

  Correct Answer: D

• Question 32:

  Given: 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: D

• Question 33:

  Given:

  

  Why does D cause a compilation error?

  A. D inherits a() only from C.

  B. D inherits a() from B and C but the return types are incompatible.

  C. D extends more than one interface.

  D. D does not define any method.

  Correct Answer: D

• Question 34:

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

  A. java.base exports all of the Java platforms core packages.

  B. module-info.java can be placed in any folder inside module-path.

  C. A module must be declared in module-info.java file.

  D. module-info.java cannot be empty.

  E. By default, modules can access each other as long as they run in the same folder.

  Correct Answer: CE

  Reference: http://tutorials.jenkov.com/java/modules.html

• Question 35:

  Which two describe reasons to modularize the JDK? (Choose two.)

  A. easier to understand the Java language

  B. improves security and maintainability

  C. easier to expose implementation details

  D. improves application robustness

  E. easier to build a custom runtime linking application modules and JDK modules

  Correct Answer: BD

• Question 36:

  Given:

  

  What is the result?

  A. compilation error

  B. 0 5

  C. 6 13

  D. 5 12

  Correct Answer: A

  

• Question 37:

  Given:

  

  Which two methods modify field values? (Choose two.)

  A. setAllCounts

  B. setACount

  C. setGCount

  D. setCCount

  E. setTCount

  Correct Answer: BE

• Question 38:

  Given:

  

  What is the result?

  A. b1

  B. 2

  C. b2

  D. 1

  E. b3

  F. 3

  G. The compilation fails due to an error in line 1.

  Correct Answer: F

  

• Question 39:

  Given the code fragment:

  

  What is the result?

  A. 0

  B. 0

  C. 1

  D. The program prints nothing.

  E. It prints 1 in the infinite loop.

  Correct Answer: D

• Question 40:

  Given:

  

  What is the type of the local variable x?

  A. Character

  B. char C. String[ ]

  D. String

  Correct Answer: D