Oracle Java SE 7 Programmer II - 1Z0-804 FREE EXAM DUMPS QUESTIONS & ANSWERS]

Question 1

Given: And the commands: javac Counter.java java ea Counter

What is the result?

A. Compilation fails B. 3 C. AssertionError is thrown at runtime D. 2 E. NullPointException is thrown at runtime

Discussion 0

Correct Answer: B Vote an answer

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Question 2

Given the code fragment:

What is the result, if the file salesreport.dat does not exist?

A. Compilation fails at line 6 and 13 B. Class java.io.FileNotFoundException C. Compilation fails only at line 6 D. Class java.io.IOException E. Compilation fails only at line 13

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Correct Answer: E Vote an answer

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Question 3

Which two are true about Singletons?

A. Singletons can be designed to be thread-safe. B. A Singleton must implement serializable. C. A Singleton implements a factory method. D. A Singleton has only the default constructor. E. A Singleton improves a class's cohesion.

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Correct Answer: A,C Vote an answer

Question 4

Given: Which statement, inserted at line 8, enables the code to compile?

A. new Task().new Counter().increment(); B. Task.Counter().increment(); C. Task.Counter.increment(); D. new Task().Counter().increment(); E. new Task.Counter().increment();

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Correct Answer: E Vote an answer

Question 5

Given the fragment: If thread a and thread b are running, but not completing, which two could be occurring?

A. loose coupling B. starvation C. livelock D. cohesion E. deadlock

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Correct Answer: C,E Vote an answer

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Question 6

Given:

What is the result?

A. Compilation succeeds B. Compilation fails at line 9 C. Compilation fails at line 5 D. Compilation fails at line 3 E. Compilation fails at line 10

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Correct Answer: E Vote an answer

Question 7

What are two differences between Callable and Runnable?

A. A Callable can return a value when executing, but a Runnable cannot. B. A Callable can be passed to a Thread, but a Runnable cannot. C. A Callable can be executed by a ExecutorService, but a Runnable cannot. D. A Callable can throw an Exception when executing, but a Runnable cannot.

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Correct Answer: A,D Vote an answer

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Question 8

Given the code fragment:

What is the result?

A. Java B. Java 7 java 6 C. Java 6 D. Java 7 E. Java 7, Java 6

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Correct Answer: E Vote an answer

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Question 9

The two methods of code reuse that aggregate the features located in multiple classes are ____________ ?

A. Composition B. Virtual Method Invocation C. Refactoring D. Inheritance E. Copy and Paste

Discussion 0

Correct Answer: A,D Vote an answer

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Question 10

Given the code fragment: Which two try statements, when inserted at line ***, enable you to print files with the extensions.java, .htm, and .jar.

A. try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir,"*.{java*,htm*,jar*}")) { B. try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir,"*.{java,htm,jar}")){ C. try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir,"**.{java,htm,jar}")) { D. try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir,"*. [java,htm,jar]")) {

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Correct Answer: B,C Vote an answer

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