Oracle 1Z0-803 Online Practice Questions and Exam Preparation

Oracle 1Z0-803 Online Questions & Answers

• Question 131:

  An unchecked exception occurs in a method dosomething() Should other code be added in the dosomething() method for it to compile and execute?

  A. The Exception must be caught
  B. The Exception must be declared to be thrown.
  C. The Exception must be caught or declared to be thrown.
  D. No other code needs to be added.
  D. No other code needs to be added.

  ---

  Because the Java programming language does not require methods to catch or to specify unchecked exceptions (RuntimeException, Error, and their subclasses), programmers may be tempted to write code that throws only unchecked exceptions or to make all their exception subclasses inherit from RuntimeException. Both of these shortcuts allow programmers to write code without bothering with compiler errors and without bothering to specify or to catch any exceptions. Although this may seem convenient to the programmer, it sidesteps the intent of the catch or specify requirement and can cause problems for others using your classes.

• Question 132:

  Given:

  

  Which statement, when inserted into line 5, is valid change?

  A. asc = sc;
  B. sc = asc;
  C. asc = (object) sc;
  D. asc = sc.clone ()
  B. sc = asc;

  ---

  Works fine.

  Incorrect answers: asc = sc.clone(); Incompatible types.

  asc =sc; Incompatible types.

  asc = (object) sc; Syntax error

• Question 133:

  Given:

  public class Test1 {

  static void doubling (Integer ref, int pv) {

  ref =20;

  pv = 20;

  }

  public static void main(String[] args) {

  Integer iObj = new Integer(10);

  int iVar = 10;

  doubling(iObj++, iVar++);

  System.out.println(iObj+ ", "+iVar);

  What is the result?

  A. 11, 11
  B. 10, 10
  C. 21, 11
  D. 20, 20
  E. 11, 12
  A. 11, 11

  ---

  The code doubling(iObj++, iVar++); increases both variables from to 10 to 11.

• Question 134:

  Given the code fragment:

  

  What is the result?

  A. Values are : [EE, ME]
  B. Values are : [EE, EE, ME]
  C. Values are : [EE, ME, EE]
  D. Values are : [SE, EE, ME, EE]
  E. Values are : [EE, ME, SE, EE]
  E. Values are : [EE, ME, SE, EE]

• Question 135:

  Given the code fragment:

  public static void main(String[] args) {

  int iArray[] = {65, 68, 69};

  iArray[2] = iArray[0];

  iArray[0] = iArray[1];

  iArray[1] = iArray[2];

  for (int element : iArray) {

  System.out.print(element + " ");

  }

  A. 68, 65, 69
  B. 68, 65, 65
  C. 65, 68, 65
  D. 65, 68, 69
  E. Compilation fails
  B. 68, 65, 65

• Question 136:

  Given:

  public class TestLoop {

  public static void main(String[] args) {

  int array[] = {0, 1, 2, 3, 4};

  int key = 3;

  for (int pos = 0; pos < array.length; ++pos) {

  if (array[pos] == key) {

  break;

  }

  }

  System.out.print("Found " + key + "at " + pos);

  }

  }

  What is the result?

  A. Found 3 at 2
  B. Found 3 at 3
  C. Compilation fails
  D. An exception is thrown at runtime
  C. Compilation fails

  ---

  The following line does not compile: System.out.print("Found " + key + "at " + pos);

  The variable pos is undefined at this line, as its scope is only valid in the for loop. Any variables created inside of a loop are LOCAL TO THE LOOP.

• Question 137:

  Given:

  

  Which code fragment, when inserted at line 7, enables the code print true?

  

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

• Question 138:

  Given:

  public class TestField {

  int x;

  int y;

  public void doStuff(int x, int y) {

  this.x = x;

  y =this.y;

  }

  public void display() {

  System.out.print(x + " " + y + " : ");

  }

  public static void main(String[] args) {

  TestField m1 = new TestField();

  m1.x = 100;

  m1.y = 200;

  TestField m2 = new TestField();

  m2.doStuff(m1.x, m1.y);

  m1.display();

  m2.display();

  }

  }

  What is the result?

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

• Question 139:

  View the exhibit.

  

  Given the code fragment:

  

  Which change enables the code to print the following?

  James age: 20 Williams age: 32

  A. Replacing line 5 with public static void main (String [] args) throws MissingInfoException, AgeOutofRangeException {
  B. Replacing line 5 with public static void main (String [] args) throws.Exception {
  C. Enclosing line 6 and line 7 within a try block and adding: catch(Exception e1) { //code goes here} catch (missingInfoException e2) { //code goes here} catch (AgeOutofRangeException e3) {//code goes here}
  D. Enclosing line 6 and line 7 within a try block and adding: catch (missingInfoException e2) { //code goes here} catch (AgeOutofRangeException e3) {//code goes here}
  C. Enclosing line 6 and line 7 within a try block and adding: catch(Exception e1) { //code goes here} catch (missingInfoException e2) { //code goes here} catch (AgeOutofRangeException e3) {//code goes here}

• Question 140:

  Given:

  

  The class is poorly encapsulated. You need to change the circle class to compute and return the area instead.

  Which two modifications are necessary to ensure that the class is being properly encapsulated?

  A. Remove the area field.
  B. Change the getArea( ) method as follows: public double getArea ( ) { return Match.PI * radius * radius; }
  C. Add the following method: public double getArea ( ) {area = Match.PI * radius * radius; }
  D. Change the cacess modifier of the SerRadius ( ) method to be protected.
  B. Change the getArea( ) method as follows: public double getArea ( ) { return Match.PI * radius * radius; }
  D. Change the cacess modifier of the SerRadius ( ) method to be protected.