Oracle Oracle Certifications 1Z0-808 Questions & Answers

• Question 311:

  Which of the following will print current time?

  A. System.out.print(new LocalTime()-now0);

  B. System.out.print(new LocalTime());

  C. System.ouLprint(LocalTime.now());

  D. System.ouLprint(LocalTime.today());

  E. None of the above.

  Correct Answer: C

  The LocalTime is an interface, so we can't use new keyword with them. So options A and C are incorrect. To get current time we can call now method on LocalTime interface. So option C is correct. Option D is incorrect as there is no method called today as in LocalTime interface https://docs.oracle.com/javase/ tutorial/datetime/iso/datetime.html

• Question 312:

  Given:

  

  What is the result?

  A. The program prints nothing

  B. d

  C. A StringIndexOutOfBoundsException is thrown at runtime.

  D. AnArrayIndexOutOfBoundsException is thrown at runtime.

  E. A NullPointerException is thrown at runtime.

  Correct Answer: C

• Question 313:

  Which statement is true about Java byte code?

  A. It can run on any platform.

  B. It can run on any platform only if it was compiled for that platform.

  C. It can run on any platform that has the Java Runtime Environment.

  D. It can run on any platform that has a Java compiler.

  E. It can run on any platform only if that platform has both the Java Runtime Environment and a Java compiler.

  Correct Answer: C

• Question 314:

  Given:

  

  What is the output?

  A. [21, 13, 11]

  B. [30]

  C. []

  D. Compilation fails due to error at line 7

  E. Compilation tails due to error at line 10

  Correct Answer: D

  Option D is the correct answer.

  Code fails to compile as we can't use primitive for collections type, so in this code trying to use int at line 7,

  causes a compile error. We should have use wrapper. Integer there. So option D is correct.

  https://docs.oracle.eom/javase/8/docs/api/java/util/ArrayList.html

• Question 315:

  Given the code fragments: What is the result?

  

  A. Super Sub Sub

  B. Contract Contract Super

  C. Compilation fails at line n1

  D. Compilation fails at line n2

  Correct Answer: D

• Question 316:

  Given the code fragment:

  

  A. Super Sub Sub

  B. Contract Contract Super

  C. Compilation fails at line n1

  D. Compilation fails at line n2

  Correct Answer: D

• Question 317:

  Given the following two classes: How should you write methods in the ElectricAccount class at line n1 so that the member variable bill is always equal to the value of the member variable kwh multiplied by the member variable rate?

  

  Any amount of electricity used by a customer (represented by an instance of the customer class) must contribute to the customer's bill (represented by the member variable bill) through the method useElectricity method. An instance of the customer class should never be able to tamper with or decrease the value of the member variable bill.

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: B

• Question 318:

  Given:

  

  What is the result?

  A. 400 200

  B. 200 200

  C. 400 400

  D. Compilation fails.

  Correct Answer: A

• Question 319:

  Given:

  

  What is the result?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: D

• Question 320:

  The protected modifier on a Field declaration within a public class means that the field ______________.

  A. Cannot be modified

  B. Can be read but not written from outside the class

  C. Can be read and written from this class and its subclasses only within the same package

  D. Can be read and written from this class and its subclasses defined in any package

  Correct Answer: D

  Reference: http://beginnersbook.com/2013/05/java-access-modifiers/