Oracle 1Z0-819 Online Practice Questions and Exam Preparation

Oracle 1Z0-819 Online Questions & Answers

• Question 41:

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

• Question 42:

  Given:

  

  What is the expected result of javac?

  A. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: package java does not exist
  B. javac compiles Mycar.java without errors or warnings.
  C. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: expected import java.lang
  D. javac fails to compile the class and prints the error message, Error: Could not find or load main class Mycar.class
  B. javac compiles Mycar.java without errors or warnings.

• Question 43:

  Given:

  

  What code must you insert on Line 1 to enable the code to print Hello world?

  A. Hello.Greeting myG = new Hello.Greeting() myG.sayHi();
  B. Hello myH = new Hello(); Hello.Greeting myG = myH.new Greeting(); myG.sayHi();
  C. Hello myH = new Hello(); Hello.Greeting myG = myH.new Hello.Greeting(); myG.sayHi();
  D. Hello myH = new Hello(); Greeting myG = new Greeting(); myG.sayHi ();
  B. Hello myH = new Hello(); Hello.Greeting myG = myH.new Greeting(); myG.sayHi();

• Question 44:

  Given: And the command: java Main Helloworld What is the result ?

  

  A. Input: Echo:
  B. Input: Helloworld Echo: Helloworld
  C. Input: Then block until any input comes from System.in.
  D. Input: Echo: Helloworld
  E. A NullPointerException is thrown at run time.
  C. Input: Then block until any input comes from System.in.

• Question 45:

  Given the Customer table structure:

  ID Number Primary Key NAME Text Nullable Given code fragment:

  

  Which statement inserted on line 14 sets NAME column to a NULL value?

  A. Stmt.setNull(2, java,sql. Types, VARCHAR);
  B. Stmt.setNull(2 string, class);
  C. Stmt.setNull(2, null);
  D. Stmt.setNull(2, java.lang, string);
  A. Stmt.setNull(2, java,sql. Types, VARCHAR);

• Question 46:

  Given the code fragment:

  

  What is the result?

  A. 13 5 7 9
  B. 1 3 5 7 9 11
  C. 2 4 6 B 10
  D. 2 4 6 8
  B. 1 3 5 7 9 11

• Question 47:

  Given:

  

  You want to implement the java.io.Serializable interface to the MyPersistenceData class. Which method should be overridden?

  A. the readExternal method
  B. nothing
  C. the readExternal and writeExternal method
  D. the writeExternal method
  B. nothing

• Question 48:

  Given: What is the type of the local variable x?

  

  A. Character
  B. char
  C. String[ ]
  D. String
  D. String

• Question 49:

  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.
  D. A runtime exception is thrown.

• Question 50:

  Examine this excerpt from the declaration of the java.se module:

  

  What does the transitive modifier mean?

  A. Only a module that requires the java.se module is permitted to require the java.sql module.
  B. Any module that requires the java.se module does not need to require the java.sql module.
  C. Any module that attempts to require the java.se module actually requires the java.sql module instead.
  D. Any module that requires the java.sql module does not need to require the java.se module.
  A. Only a module that requires the java.se module is permitted to require the java.sql module.