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Oracle 1Z0-808 問題練習

Java SE 8 Programmer I 試験

最新更新時間: 2019/05/15,合計216問。

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Question No : 1
Given the following classes:



Which two options fail to compile when placed at line n1 of the main method?

正解:
Explanation:

Question No : 2
Given:



What is the result?

正解:

Question No : 3
Given the code fragment:



What is the result?

正解:

Question No : 4
Which two are benefits of polymorphism?

正解:
Explanation:
Reference: https://www.cs.princeton.edu/courses/archive/fall98/cs441/mainus/node5.html

Question No : 5
Given:



What is the result?

正解:

Question No : 6
Given the following code for the classes MyException and Test:



What is the result?

正解:

Question No : 7
Given:



What is the result?

正解:

Question No : 8
Given the code fragment:



Which three code fragments can be independently inserted at line nl to enable the code to print one?

正解:

Question No : 9
Given:



What is the result?

正解:

Question No : 10
Given:



How many MarkList instances are created in memory at runtime?

正解:

Question No : 11
Which statement is true about Java byte code?

正解:
Explanation:
Reference:http://www.math.uni-hamburg.de/doc/java/tutorial/getStarted/intro/definition.html

Question No : 12
Given the following class declarations:
- public abstract class Animal
- public interface Hunter -public class Cat extends Animalimplements Hunter
- public class Tiger extends Cat
Which answer fails to compile?



正解:

Question No : 13
Given:



What is the result?

正解:

Question No : 14
Given the code fragment:
int [] array = {I, 2, 3, 4, 5};
And given the requirements:
- Process all the elements of the array in the order of entry.
- Process all the elements of the array in the reverse order of entry.
- Process alternating elements of the array in the order of entry.
Which two statements are true?

正解:

Question No : 15
Given the content of three files:



Which statement is true?
A. Only the A.Java file compiles successfully.
B. Only the B.java file compiles successfully.
C. Only the C.java file compiles successfully.
D. The A.Java and B.java files compile successfully.
E. The B.java and C.java files compile successfully.
F. The A.Java and C.java files compile successfully.

正解: E

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