Oracle 1Z0-808 Online Practice Questions and Exam Preparation

Oracle 1Z0-808 Online Questions & Answers

• Question 1:

  Given the content of the Customer.java and Trader.java files:

  

  Which two methods can be overridden in the Trader class from the Customer class? (Choose two.)

  A. m2()
  B. m3()
  C. m4()
  D. m1()
  B. m3()
  D. m1()

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  explanation:

  Explanation/Reference:

  B: m3 is protected, but can be accessed if the other class extends the parent class even though it is in a different package.

  D: m1 is public, just by importing the package you can access it normally.

• Question 2:

  Given:

  

  What is the result?

  A. myStr: 7007, myNum: 7007
  B. Error
  C. myStr: 9009, myNum: 7007
  D. myStr: 7007, myNum: 9009
  C. myStr: 9009, myNum: 7007

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  explanation:

  Explanation/Reference:

  

• Question 3:

  Given the code fragment: Which action enables the code to print Helping... Done?

  

  A. replace class Humanoid extends Robot { with abstract class Humanoid extends Robot {
  B. replace interface Speakable { with abstract class Speakable
  C. replace public void process(); with public abstract void process();
  D. replace abstract class Robot implements Speakable { with class Robot extends Speakable {
  C. replace public void process(); with public abstract void process();

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  explanation:

  

  Explanation/Reference:

• Question 4:

  Which two code fragments cause compilation errors? (Choose two.)

  A. double y1 = 203.22; float fit = y1;
  B. float fit = (float) 1_11.00;
  C. Float fit = 100.00;
  D. int y2 = 100; float fit = (float) y2;
  E. float fit = 100.00F;
  A. double y1 = 203.22; float fit = y1;
  C. Float fit = 100.00;

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  explanation:

  Explanation/Reference:

• Question 5:

  Given:

  

  What is the result?

  A. c=null b=true f=0.0
  B. c= b=false f=0.0
  C. c=null b=false f=0.0
  D. c=0 b=false f=0.0F
  C. c=null b=false f=0.0

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  explanation:

  Explanation/Reference:

  

• Question 6:

  Given:

  

  What is the result?

  A. double sum is 30.0 float sum is 30.0
  B. float sum is 30.0 double sum is 30.0
  C. Integer sum is 30 double sum is 30.0
  D. Integer sum is 30 float sum is 30.0
  B. float sum is 30.0 double sum is 30.0

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  explanation:

  Explanation/Reference:

  

• Question 7:

  Given the code fragment:

  

  Which code snippet at line 9 prints true?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  B. Option B

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  explanation:

  Explanation/Reference:

  

• Question 8:

  Examine the content of App.java:

  

  Which is true?

  A. The App.class file is stored within the p1 folder. The Test.class file is stored within the p2 sub-folder of p1.
  B. The App class is accessible within the Test class without an import statement.
  C. import p1.App; is used to access the App class within the Test class.
  D. It is optional to have the package statement as the first line of class definitions.
  C. import p1.App; is used to access the App class within the Test class.

• Question 9:

  Given:

  

  Which two code fragments can be inserted at line n1?

  A. String str = "Java";
  B. for(int iVal = 0; iVal
  C. Test() {}
  D. package p1;
  E. import java.io.*;
  A. String str = "Java";
  C. Test() {}

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  explanation:

  Explanation/Reference:

  The correct answer is AC B -> You can't put a for loop outside the main method D -> This one is very wrong, you can only declare the package in the first line of code E -> This one is as wrong as the letter D, you can only import one package before instantiating the class and if you have a package declared, the declaration can only be made between it and the class declaration, anything outside of that is wrong

• Question 10:

  Given:

  

  What is the result?

  A. 0:0 100:0
  B. null:0 100:0
  C. 0:0 100:200
  D. null:null 100:null
  A. 0:0 100:0

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  explanation:

  Explanation/Reference: