Oracle 1Z0-803 Online Practice Questions and Exam Preparation

Oracle 1Z0-803 Online Questions & Answers

• Question 121:

  Given:

  

  And the commands: Javac Test.java Java Test 12345

  What is the result?

  A. Number us : 12345
  B. A NullPointerException is thrown at runtime
  C. A NumberFormatException is thrown at runtime
  D. AnArrayIndexOutOfBoundException is thrown at runtime.
  A. Number us : 12345

• Question 122:

  Given:

  

  Which line causes a compilation error?

  A. line x1
  B. line x2
  C. line x3
  D. line x4
  B. line x2

  ---

  The variable x2 is used before it has been declared.

• Question 123:

  Given:

  

  Which code fragment, when inserted at line 14, enables the code to print Mike Found?

  A. int f = ps.indexOf {new patient ("Mike")};
  B. int f = ps.indexOf (patient("Mike"));
  C. patient p = new Patient ("Mike"); int f = pas.indexOf(P)
  D. int f = ps.indexOf(p2);
  C. patient p = new Patient ("Mike"); int f = pas.indexOf(P)

• Question 124:

  Given the code fragment:

  Boolean b1 = true;

  Boolean b2 = false;

  int i = 0;

  while (foo) { }

  Which one is valid as a replacement for foo?

  A. b1.compareTo(b2)
  B. i = 1
  C. i == 2? -1 : 0
  D. "foo".equals("bar")
  D. "foo".equals("bar")

  ---

  Equals works fine on strings equals produces a Boolean value.

  Incorrect answers:

  the compareTo method produces and int, not a boolean.

  i = 1 is an assignment, not a comparison.

  i == 2? -1:0 would produce the integer 0. A Boolean value is needed.

• Question 125:

  Given:

  

  What is the result?

  A. 10 : 22 : 20
  B. 10 : 22 : 22
  C. 10 : 22 : 6
  D. 10 : 30 : 6
  B. 10 : 22 : 22

• Question 126:

  Which two statements are true for a two-dimensional array?

  A. It is implemented as an array of the specified element type.
  B. Using a row by column convention, each row of a two-dimensional array must be of the same size.
  C. At declaration time, the number of elements of the array in each dimension must be specified.
  D. All methods of the class Object may be invoked on the two-dimensional array.
  A. It is implemented as an array of the specified element type.
  D. All methods of the class Object may be invoked on the two-dimensional array.

• Question 127:

  Given:

  public class SampleClass {

  public static void main(String[] args) {

  AnotherSampleClass asc = new AnotherSampleClass(); SampleClass sc = new SampleClass(); sc = asc; System.out.println("sc: " + sc.getClass());

  System.out.println("asc: " + asc.getClass());

  }}

  class AnotherSampleClass extends SampleClass {

  }

  What is the result?

  A. sc: class Object asc: class AnotherSampleClass
  B. sc: class SampleClass asc: class AnotherSampleClass
  C. sc: class AnotherSampleClass asc: class SampleClass
  D. sc: class AnotherSampleClass asc: class AnotherSampleClass
  D. sc: class AnotherSampleClass asc: class AnotherSampleClass

• Question 128:

  Given the code fragment:

  System.out.printIn ("Result: " +3+5); System.out.printIn ("Result: " + (3+5)); What is the result?

  A. Result: 8 Result: 8
  B. Result: 35 Result: 8
  C. Result: 8 Result: 35
  D. Result: 35 Result: 35
  B. Result: 35 Result: 8

  ---

  In the first statement 3 and 5 are treated as strings and are simply concatenated. In the first statement 3 and 5 are treated as integers and their sum is calculated.

• Question 129:

  Given:

  class Base {

  public static void main(String[] args) {

  System.out.println("Base " + args[2]);

  }

  }

  public class Sub extends Base{

  public static void main(String[] args) {

  System.out.println("Overriden " + args[1]);

  }

  }

  And the commands:

  javac Sub.java java Sub 10 20 30

  What is the result?

  A. Base 30
  B. Overridden 20
  C. Overridden 20 Base 30
  D. Base 30 Overridden 20
  B. Overridden 20

• Question 130:

  boolean log3 = ( 5.0 != 6.0) andand ( 4 != 5); boolean log4 = (4 != 4) || (4 == 4); System.out.println("log3:"+ log3 + \nlog4" + log4);

  What is the result?

  A. log3:false log4:true
  B. log3:true log4:true
  C. log3:true log4:false
  D. log3:false log4:false
  B. log3:true log4:true