Oracle 1Z0-803 Online Practice Questions and Exam Preparation

Oracle 1Z0-803 Online Questions & Answers

• Question 211:

  Given: Given:

  public class SuperTest { public static void main(String[] args) { statement1 statement2 statement3 } }

  class Shape {

  public Shape() {

  System.out.println("Shape: constructor");

  }

  public void foo() {

  System.out.println("Shape: foo");

  }

  }

  class Square extends Shape {

  public Square() {

  super();

  }

  public Square(String label) {

  System.out.println("Square: constructor");

  }

  public void foo() {

  super.foo();

  }

  public void foo(String label) {

  System.out.println("Square: foo");

  }

  }

  }

  }

  What should statement1, statement2, and statement3, be respectively, in order to produce the result?

  Shape: constructor

  Square: foo

  Shape: foo

  A. Square square = new Square ("bar"); square.foo ("bar"); square.foo();
  B. Square square = new Square ("bar"); square.foo ("bar"); square.foo ("bar");
  C. Square square = new Square (); square.foo (); square.foo(bar);
  D. Square square = new Square (); square.foo (); square.foo("bar");
  E. Square square = new Square (); square.foo (); square.foo ();
  F. Square square = new Square(); square.foo("bar"); square.foo();
  F. Square square = new Square(); square.foo("bar"); square.foo();

  ---

  Incorrect answers:

  A: Produces Shape: constructor Square: constructor Square: foo Shape: foo

  B: Produces Shape: constructor Square: constructor Square: foo Square: foo

  C: Produces Shape: constructor Shape: foo Square: foo

  E: Produces Shape: constructor Shape: foo Shape: foo

• Question 212:

  Given:

  public class MyClass {

  public static void main(String[] args) {

  while (int ii = 0; ii < 2) {

  ii++;

  System.out.println("ii = " + ii);

  }

  }

  }

  What is the result?

  A. ii = 1 ii = 2
  B. Compilation fails
  C. The program prints nothing
  D. The program goes into an infinite loop with no output
  E. The program goes to an infinite loop outputting: ii = 1 ii = 1
  B. Compilation fails

  ---

  The while statement is incorrect. It has the syntax of a for statement.

  The while statement continually executes a block of statements while a particular condition is true. Its syntax can be expressed as:

  while (expression) {

  statement(s)

  }

  The while statement evaluates expression, which must return a boolean value. If the expression evaluates to true, the while statement executes the statement(s) in the while block. The while statement continues testing the expression and

  executing its block until the expression evaluates to false.

  Reference: The while and do-while Statements

• Question 213:

  Given the code fragment:

  for (int ii = 0; ii < 3;ii++) {

  int count = 0;

  for (int jj = 3; jj > 0; jj--) {

  if (ii == jj) {

  ++count;

  break;

  }

  }

  System.out.print(count);

  continue;

  }

  What is the result?

  A. 011
  B. 012
  C. 123
  D. 000
  A. 011

• Question 214:

  Given the code in a file Traveler.java:

  

  And the commands:

  Javac Traveler.java Java Traveler Java Duke What is the result?

  A. Happy Journey! Duke
  B. Happy Journey! Java
  C. An exception is thrown at runtime
  D. The program fails to execute due to a runtime error
  D. The program fails to execute due to a runtime error

• Question 215:

  Given:

  

  What is the result?

  A. 2 4 6 8 10 12
  B. 2 4 6 8 10 12 14
  C. Compilation fails
  D. The program prints multiple of 2 infinite times
  E. The program prints nothing
  B. 2 4 6 8 10 12 14

• Question 216:

  Given:

  public class TestLoop1 {

  public static void main(String[] args) {

  int a = 0, z=10;

  while (a < z) {

  a++;

  --z;

  }

  System.out.print(a + " : " + z);

  }

  }

  What is the result?

  A. 5 : 5
  B. 6 : 4
  C. 6 : 5
  D. 5 : 4
  A. 5 : 5