Oracle 1Z0-808 Online Practice Questions and Exam Preparation

Oracle 1Z0-808 Online Questions & Answers

• Question 91:

  Given the code fragment:

  

  What is the result?

  A. 3142
  B. 2413
  C. 1324
  D. 4231
  D. 4231

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  Explanation/Reference:

  

• Question 92:

  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

  ---

  Explanation/Reference:

  

• Question 93:

  You are asked to create a method that accepts an array of integers and returns the highest value from that

  array.

  Given the code fragment:

  

  Which method signature do you use at line n1?

  A. public int findMax (int [] numbers)
  B. static int[] findMax (int[] max)
  C. static int findMax (int [] numbers)
  D. final int findMax (int [] )
  B. static int[] findMax (int[] max)

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  Explanation/Reference:

• Question 94:

  Given the code fragment

  int var1 = -5;

  int var2 = var1--;

  int var3 = 0;

  if (var2 < 0) {

  var3 = var2++;

  } else {

  var3 = --var2;

  }

  System.out.println(var3);

  What is the result?

  A. ?6
  B. ?4
  C. ?5
  D. 5
  E. 4
  F. Compilation fails
  C. ?5

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  Explanation/Reference:

• Question 95:

  Which three are advantages of the Java exception mechanism?

  A. Improves the program structure because the error handling code is separated from the normal program function
  B. Provides a set of standard exceptions that covers all the possible errors
  C. Improves the program structure because the programmer can choose where to handle exceptions
  D. Improves the program structure because exceptions must be handled in the method in which they occurred
  E. Allows the creation of new exceptions that are tailored to the particular program being created
  A. Improves the program structure because the error handling code is separated from the normal program function
  C. Improves the program structure because the programmer can choose where to handle exceptions
  E. Allows the creation of new exceptions that are tailored to the particular program being created

• Question 96:

  Given:

  

  What is the output?

  A. [21, 13, 11]
  B. [30]
  C. []
  D. Compilation fails due to error at line 7
  E. Compilation tails due to error at line 10
  D. Compilation fails due to error at line 7

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  Explanation/Reference:

  Option D is the correct answer.

  Code fails to compile as we can't use primitive for collections type, so in this code trying to use int at line 7, causes a compile error. We should have use wrapper. Integer there. So option D is correct.

  https://docs.oracle.eom/javase/8/docs/api/java/util/ArrayList.html

• Question 97:

  Given the code fragment:

  

  Which code fragment, when inserted at line 3, enables the code to print 10:20?

  A. int[] array n= new int[2];
  B. int[] array; array = int[2];
  C. int array = new int[2];
  D. int array [2] ;
  A. int[] array n= new int[2];

• Question 98:

  Given the code fragment:

  

  What is the result?

  A. Found Red Found Default
  B. Found Teal
  C. Found Red Found Blue Found Teal
  D. Found Red Found Blue Found Teal Found Default
  E. Found Default
  B. Found Teal

• Question 99:

  Given the definitions of the Bird class and the Peacock class:

  

  and the code fragment:

  

  Which code snippet can be inserted to print Fly.Dance. ?

  A. Bird p = new Peacock();
  B. Bird b = new Bird(); Peacock p = (Peacock) b;
  C. Peacock b = new Peacock (); Bird p = (Bird) b;
  D. Bird b = new Peacock (); Peacock p = (Peacock) b;
  D. Bird b = new Peacock (); Peacock p = (Peacock) b;

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  Explanation/Reference:

  Answer is D.

  To test:

  class Bird {

  public void fly() {

  System.out.print("Fly.");

  }

  }

  class Peacock extends Bird {

  public void dance() {

  System.out.print("Dance.");

  }

  }

  public class Test {

  public static void main(String[] args) {

  Bird b = new Peacock (); Peacock p = (Peacock) b;

  p.fly();

  p.dance();

  }

  }

• Question 100:

  Given:

  

  What is the result?

  

  A. B. C. D.
  B

  ---

  Explanation/Reference:

  Answer is B

  public class Main {

  public static void doSum(Integer x, Integer y) {

  System.out.println("Integer sum is " + (x + y));

  }

  public static void doSum(double x, double y) {

  System.out.println("Double sum is " + (x + y));

  }

  public static void doSum(float x, float y) {

  System.out.println("Float sum is " + (x + y));

  }

  public static void doSum(int x, int y) {

  System.out.println("Int sum is " + (x + y));

  }

  public static void main(String[] args) {

  doSum(10, 20);

  doSum(10.0, 20.0);

  }