Oracle Oracle Certifications 1Z0-815 Questions & Answers

• Question 21:

  Given:

  

  What is the result?

  A. An exception is thrown at runtime.

  B. 42=(x+y)=42

  C. 42=(x+y)=6

  D. 6=(x+y)=42

  E. 6=(x+y)=6

  Correct Answer: D

  

• Question 22:

  Given:

  

  Which expression when added at line 1 will produce the output of 1.17?

  A. float z = (float)(Math.round((float)x/y*100)/100);

  B. float z = Math.round((int)(x/y),2);

  C. float z = Math.round((float)x/y,2);

  D. float z = Math.round((float)x/y*100)/(float)100;

  Correct Answer: D

  

• Question 23:

  Given:

  

  What is the result?

  A. Map: 0 Keys: 0 Values: 0

  B. The compilation fails.

  C. Map: 4 Keys: 4 Values: 4

  D. Map: 4 Keys: 0 Values: 0

  E. Map: 0 Keys: 4 Values: 4

  Correct Answer: D

  

• Question 24:

  Given:

  

  What is the result?

  A. Dr. Who

  B. Dr. Null

  C. An exception is thrown at runtime.

  D. null

  Correct Answer: D

  

• Question 25:

  Given:

  

  What is the result?

  A. 9

  B. An exception is thrown at runtime.

  C. 3

  D. 6

  Correct Answer: D

  

• Question 26:

  Given: Which statement is true?

  

  A. Class Tester does not need to import java.time.LocalDate because it is already visible to members of the package test.

  B. All classes from the package java.time. are loaded for the class Diary.

  C. Only LocalDate class from java.time package is loaded.

  D. Tester must import java.time.LocalDate in order to compile.

  Correct Answer: A

• Question 27:

  Given: 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 28:

  Given:

  

  What is the type of x?

  A. char

  B. List

  C. String

  D. List

  Correct Answer: B

• Question 29:

  Which statement about access modifiers is correct?

  A. An instance variable can be declared with the static modifier.

  B. A local variable can be declared with the final modifier.

  C. An abstract method can be declared with the private modifier.

  D. An inner class cannot be declared with the public modifier.

  E. An interface can be declared with the protected modifier.

  Correct Answer: E

  Reference: https://javabeginnerstutorial.com/core-java-tutorial/instance-variable-java/

• Question 30:

  Given the code fragment:

  

  What is the output?

  A. The compilation fails.

  B. [-1, -2, -3]

  C. [-3, -2, -1]

  D. A runtime exception is thrown.

  Correct Answer: A